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    <title>DEV Community: Shuvo</title>
    <description>The latest articles on DEV Community by Shuvo (@0shuvo0).</description>
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      <title>DEV Community: Shuvo</title>
      <link>https://dev.to/0shuvo0</link>
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    <item>
      <title>Before AI we had ...</title>
      <dc:creator>Shuvo</dc:creator>
      <pubDate>Fri, 22 May 2026 04:12:37 +0000</pubDate>
      <link>https://dev.to/0shuvo0/before-ai-we-had--5a0g</link>
      <guid>https://dev.to/0shuvo0/before-ai-we-had--5a0g</guid>
      <description>&lt;p&gt;Nowadays you will hear a lot of people saying &lt;strong&gt;Why should I hire a software developer when I can vibecode it my self with about $100 worth of AI tools?&lt;/strong&gt;&lt;/p&gt;

&lt;p&gt;&lt;em&gt;Well they aren't wrong about that!&lt;/em&gt;&lt;/p&gt;

&lt;p&gt;But getting an app made and running was never the hard part. Before &lt;strong&gt;AI or vibe coding&lt;/strong&gt; we had platforms like &lt;strong&gt;Fiverr/UpWork&lt;/strong&gt; where people could just pay a third world country developer &lt;strong&gt;$50-$100&lt;/strong&gt; to build them their app.&lt;/p&gt;

&lt;p&gt;So getting a &lt;strong&gt;working APP&lt;/strong&gt; or at least &lt;strong&gt;MVP&lt;/strong&gt; was never really very hard or expensive rather its the &lt;strong&gt;distribution&lt;/strong&gt; part that kills 99% of the apps.&lt;/p&gt;

&lt;blockquote&gt;
&lt;p&gt;And for handling complex apps or codebases &lt;strong&gt;cheap developers&lt;/strong&gt; were not reliable then, &lt;strong&gt;AI tools&lt;/strong&gt; are not reliable now!&lt;/p&gt;
&lt;/blockquote&gt;

&lt;p&gt;&lt;a href="https://www.gitmission.com/" rel="noopener noreferrer"&gt;&lt;img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fwzzlb8ltgzwelahgpuyy.png" alt="GitMission Preview" width="799" height="471"&gt;&lt;/a&gt;&lt;/p&gt;

</description>
      <category>ai</category>
      <category>programming</category>
      <category>discuss</category>
      <category>coding</category>
    </item>
    <item>
      <title>Frontend rate limiting can save you $10,000</title>
      <dc:creator>Shuvo</dc:creator>
      <pubDate>Thu, 21 May 2026 04:04:07 +0000</pubDate>
      <link>https://dev.to/0shuvo0/frontend-rate-limiting-can-save-you-10000-272l</link>
      <guid>https://dev.to/0shuvo0/frontend-rate-limiting-can-save-you-10000-272l</guid>
      <description>&lt;blockquote&gt;
&lt;p&gt;Fastest Requests Are the Ones You Never Make&lt;/p&gt;
&lt;/blockquote&gt;

&lt;p&gt;While backend rate limiting is absolutely crucial, &lt;strong&gt;it comes at a cost&lt;/strong&gt;.&lt;/p&gt;

&lt;p&gt;For backend rate limiting, we usually store a user's IP and request timestamps in &lt;strong&gt;memory&lt;/strong&gt; or a &lt;strong&gt;Redis database&lt;/strong&gt;. If your app has millions of users, you end up storing a lot of data in memory or a database — and that can get expensive fast.&lt;/p&gt;

&lt;p&gt;But what if &lt;strong&gt;we block requests &lt;em&gt;before&lt;/em&gt; they ever leave the browser/client&lt;/strong&gt;? By handling rate limiting on the client side, we can save a significant number of unnecessary request and read/write operations on the backend. Depending on how many users your app has, this can translate to anywhere between &lt;strong&gt;hundreds to thousands of dollars saved per year&lt;/strong&gt;.&lt;/p&gt;

&lt;h3&gt;
  
  
  1: Basic frontend rate limiter example:
&lt;/h3&gt;



&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight typescript"&gt;&lt;code&gt;&lt;span class="c1"&gt;// utils/rate-limiter.ts&lt;/span&gt;

&lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;MAX_REQUESTS&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="mi"&gt;50&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;           &lt;span class="c1"&gt;// Maximum number of requests allowed&lt;/span&gt;
&lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;TIME_WINDOW&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="mi"&gt;60&lt;/span&gt; &lt;span class="o"&gt;*&lt;/span&gt; &lt;span class="mi"&gt;1000&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;    &lt;span class="c1"&gt;// Time window in milliseconds (1 minute)&lt;/span&gt;

&lt;span class="c1"&gt;// Store timestamps of recent requests&lt;/span&gt;
&lt;span class="kd"&gt;let&lt;/span&gt; &lt;span class="nx"&gt;requestTimestamps&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="kr"&gt;number&lt;/span&gt;&lt;span class="p"&gt;[]&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="p"&gt;[];&lt;/span&gt;

&lt;span class="c1"&gt;// Check if a new request is within the allowed limit&lt;/span&gt;
&lt;span class="kd"&gt;function&lt;/span&gt; &lt;span class="nf"&gt;canMakeRequest&lt;/span&gt;&lt;span class="p"&gt;():&lt;/span&gt; &lt;span class="nx"&gt;boolean&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
    &lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;currentTime&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="nb"&gt;Date&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;now&lt;/span&gt;&lt;span class="p"&gt;();&lt;/span&gt;

    &lt;span class="c1"&gt;// Remove timestamps that have fallen outside the time window&lt;/span&gt;
    &lt;span class="nx"&gt;requestTimestamps&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="nx"&gt;requestTimestamps&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;filter&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;
        &lt;span class="nx"&gt;timestamp&lt;/span&gt; &lt;span class="o"&gt;=&amp;gt;&lt;/span&gt; &lt;span class="nx"&gt;currentTime&lt;/span&gt; &lt;span class="o"&gt;-&lt;/span&gt; &lt;span class="nx"&gt;timestamp&lt;/span&gt; &lt;span class="o"&gt;&amp;lt;&lt;/span&gt; &lt;span class="nx"&gt;TIME_WINDOW&lt;/span&gt;
    &lt;span class="p"&gt;);&lt;/span&gt;

    &lt;span class="k"&gt;return&lt;/span&gt; &lt;span class="nx"&gt;requestTimestamps&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;length&lt;/span&gt; &lt;span class="o"&gt;&amp;lt;&lt;/span&gt; &lt;span class="nx"&gt;MAX_REQUESTS&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;

&lt;span class="c1"&gt;// Drop-in fetch wrapper with rate limiting&lt;/span&gt;
&lt;span class="kd"&gt;function&lt;/span&gt; &lt;span class="nf"&gt;$fetch&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;url&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="kr"&gt;string&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="nx"&gt;options&lt;/span&gt;&lt;span class="p"&gt;?:&lt;/span&gt; &lt;span class="nx"&gt;RequestInit&lt;/span&gt;&lt;span class="p"&gt;):&lt;/span&gt; &lt;span class="nb"&gt;Promise&lt;/span&gt;&lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="nx"&gt;Response&lt;/span&gt;&lt;span class="o"&gt;&amp;gt;&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
    &lt;span class="k"&gt;if &lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="o"&gt;!&lt;/span&gt;&lt;span class="nf"&gt;canMakeRequest&lt;/span&gt;&lt;span class="p"&gt;())&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
        &lt;span class="k"&gt;return&lt;/span&gt; &lt;span class="nb"&gt;Promise&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;reject&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="k"&gt;new&lt;/span&gt; &lt;span class="nc"&gt;Error&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="s1"&gt;Rate limit exceeded. Please try again later.&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="p"&gt;));&lt;/span&gt;
    &lt;span class="p"&gt;}&lt;/span&gt;

    &lt;span class="nx"&gt;requestTimestamps&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;push&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nb"&gt;Date&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;now&lt;/span&gt;&lt;span class="p"&gt;());&lt;/span&gt;
    &lt;span class="k"&gt;return&lt;/span&gt; &lt;span class="nf"&gt;fetch&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;url&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="nx"&gt;options&lt;/span&gt;&lt;span class="p"&gt;);&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;

&lt;span class="k"&gt;export&lt;/span&gt; &lt;span class="k"&gt;default&lt;/span&gt; &lt;span class="nx"&gt;$fetch&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;



&lt;p&gt;&lt;a href="https://www.gitmission.com/" rel="noopener noreferrer"&gt;&lt;img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fwzzlb8ltgzwelahgpuyy.png" alt="GitMission Preview" width="799" height="471"&gt;&lt;/a&gt;&lt;/p&gt;




&lt;h3&gt;
  
  
  2. Better rate limiter with cooldown time and localstorage implementation so user can't just reset limit by refreshing the page
&lt;/h3&gt;



&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight javascript"&gt;&lt;code&gt;&lt;span class="c1"&gt;// Front end rate limiter&lt;/span&gt;
&lt;span class="c1"&gt;// Max number of requests allowed per time window&lt;/span&gt;
&lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;MAX_REQUESTS&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="mi"&gt;50&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt; &lt;span class="c1"&gt;// Maximum number of requests allowed&lt;/span&gt;
&lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;TIME_WINDOW&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="mi"&gt;60&lt;/span&gt; &lt;span class="o"&gt;*&lt;/span&gt; &lt;span class="mi"&gt;1000&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt; &lt;span class="c1"&gt;// Time window in milliseconds (e.g., 1 minute)&lt;/span&gt;
&lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;COOLDOWN_TIME&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="mi"&gt;30&lt;/span&gt; &lt;span class="o"&gt;*&lt;/span&gt; &lt;span class="mi"&gt;1000&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt; &lt;span class="c1"&gt;// Time to wait after hitting the rate limit before requests are allowed again&lt;/span&gt;

&lt;span class="c1"&gt;// localStorage keys for persisting state across page refreshes&lt;/span&gt;
&lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;STORAGE_KEY_TIMESTAMPS&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="s1"&gt;rate_limiter_timestamps&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
&lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;STORAGE_KEY_COOLDOWN&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="s1"&gt;rate_limiter_cooldown_until&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;

&lt;span class="c1"&gt;// --- localStorage helpers ---&lt;/span&gt;

&lt;span class="c1"&gt;// Load request timestamps from localStorage, falling back to an empty array&lt;/span&gt;
&lt;span class="kd"&gt;function&lt;/span&gt; &lt;span class="nf"&gt;loadTimestamps&lt;/span&gt;&lt;span class="p"&gt;():&lt;/span&gt; &lt;span class="nx"&gt;number&lt;/span&gt;&lt;span class="p"&gt;[]&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
    &lt;span class="k"&gt;try&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
        &lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;stored&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="nx"&gt;localStorage&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;getItem&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;STORAGE_KEY_TIMESTAMPS&lt;/span&gt;&lt;span class="p"&gt;);&lt;/span&gt;
        &lt;span class="k"&gt;return&lt;/span&gt; &lt;span class="nx"&gt;stored&lt;/span&gt; &lt;span class="p"&gt;?&lt;/span&gt; &lt;span class="nx"&gt;JSON&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;parse&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;stored&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="p"&gt;[];&lt;/span&gt;
    &lt;span class="p"&gt;}&lt;/span&gt; &lt;span class="k"&gt;catch&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
        &lt;span class="k"&gt;return&lt;/span&gt; &lt;span class="p"&gt;[];&lt;/span&gt;
    &lt;span class="p"&gt;}&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;

&lt;span class="c1"&gt;// Persist the current timestamps array to localStorage&lt;/span&gt;
&lt;span class="kd"&gt;function&lt;/span&gt; &lt;span class="nf"&gt;saveTimestamps&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;timestamps&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="nx"&gt;number&lt;/span&gt;&lt;span class="p"&gt;[]):&lt;/span&gt; &lt;span class="k"&gt;void&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
    &lt;span class="k"&gt;try&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
        &lt;span class="nx"&gt;localStorage&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;setItem&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;STORAGE_KEY_TIMESTAMPS&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="nx"&gt;JSON&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;stringify&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;timestamps&lt;/span&gt;&lt;span class="p"&gt;));&lt;/span&gt;
    &lt;span class="p"&gt;}&lt;/span&gt; &lt;span class="k"&gt;catch&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
        &lt;span class="c1"&gt;// Silently fail if localStorage is unavailable (e.g. private browsing restrictions)&lt;/span&gt;
    &lt;span class="p"&gt;}&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;

&lt;span class="c1"&gt;// Load the cooldown expiry timestamp (ms since epoch), or 0 if none is set&lt;/span&gt;
&lt;span class="kd"&gt;function&lt;/span&gt; &lt;span class="nf"&gt;loadCooldownUntil&lt;/span&gt;&lt;span class="p"&gt;():&lt;/span&gt; &lt;span class="nx"&gt;number&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
    &lt;span class="k"&gt;try&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
        &lt;span class="k"&gt;return&lt;/span&gt; &lt;span class="nc"&gt;Number&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;localStorage&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;getItem&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;STORAGE_KEY_COOLDOWN&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="o"&gt;??&lt;/span&gt; &lt;span class="mi"&gt;0&lt;/span&gt;&lt;span class="p"&gt;);&lt;/span&gt;
    &lt;span class="p"&gt;}&lt;/span&gt; &lt;span class="k"&gt;catch&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
        &lt;span class="k"&gt;return&lt;/span&gt; &lt;span class="mi"&gt;0&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
    &lt;span class="p"&gt;}&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;

&lt;span class="c1"&gt;// Persist the cooldown expiry timestamp to localStorage&lt;/span&gt;
&lt;span class="kd"&gt;function&lt;/span&gt; &lt;span class="nf"&gt;saveCooldownUntil&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;until&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="nx"&gt;number&lt;/span&gt;&lt;span class="p"&gt;):&lt;/span&gt; &lt;span class="k"&gt;void&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
    &lt;span class="k"&gt;try&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
        &lt;span class="nx"&gt;localStorage&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;setItem&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;STORAGE_KEY_COOLDOWN&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="nc"&gt;String&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;until&lt;/span&gt;&lt;span class="p"&gt;));&lt;/span&gt;
    &lt;span class="p"&gt;}&lt;/span&gt; &lt;span class="k"&gt;catch&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
        &lt;span class="c1"&gt;// Silently fail if localStorage is unavailable&lt;/span&gt;
    &lt;span class="p"&gt;}&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;

&lt;span class="c1"&gt;// --- Core rate-limit logic ---&lt;/span&gt;

&lt;span class="c1"&gt;// Function to check if a request can be made&lt;/span&gt;
&lt;span class="kd"&gt;function&lt;/span&gt; &lt;span class="nf"&gt;canMakeRequest&lt;/span&gt;&lt;span class="p"&gt;():&lt;/span&gt; &lt;span class="nx"&gt;boolean&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
    &lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;currentTime&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="nb"&gt;Date&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;now&lt;/span&gt;&lt;span class="p"&gt;();&lt;/span&gt;

    &lt;span class="c1"&gt;// If an active cooldown exists, block all requests until it expires&lt;/span&gt;
    &lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;cooldownUntil&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="nf"&gt;loadCooldownUntil&lt;/span&gt;&lt;span class="p"&gt;();&lt;/span&gt;
    &lt;span class="k"&gt;if &lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;cooldownUntil&lt;/span&gt; &lt;span class="o"&gt;&amp;amp;&amp;amp;&lt;/span&gt; &lt;span class="nx"&gt;currentTime&lt;/span&gt; &lt;span class="o"&gt;&amp;lt;&lt;/span&gt; &lt;span class="nx"&gt;cooldownUntil&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
        &lt;span class="k"&gt;return&lt;/span&gt; &lt;span class="kc"&gt;false&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
    &lt;span class="p"&gt;}&lt;/span&gt;

    &lt;span class="c1"&gt;// Load persisted timestamps so a page refresh doesn't reset the counter&lt;/span&gt;
    &lt;span class="kd"&gt;let&lt;/span&gt; &lt;span class="nx"&gt;requestTimestamps&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="nf"&gt;loadTimestamps&lt;/span&gt;&lt;span class="p"&gt;();&lt;/span&gt;

    &lt;span class="c1"&gt;// Remove timestamps that are outside the time window&lt;/span&gt;
    &lt;span class="nx"&gt;requestTimestamps&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="nx"&gt;requestTimestamps&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;filter&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;
        &lt;span class="nx"&gt;timestamp&lt;/span&gt; &lt;span class="o"&gt;=&amp;gt;&lt;/span&gt; &lt;span class="nx"&gt;currentTime&lt;/span&gt; &lt;span class="o"&gt;-&lt;/span&gt; &lt;span class="nx"&gt;timestamp&lt;/span&gt; &lt;span class="o"&gt;&amp;lt;&lt;/span&gt; &lt;span class="nx"&gt;TIME_WINDOW&lt;/span&gt;
    &lt;span class="p"&gt;);&lt;/span&gt;

    &lt;span class="c1"&gt;// Persist the cleaned-up timestamps&lt;/span&gt;
    &lt;span class="nf"&gt;saveTimestamps&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;requestTimestamps&lt;/span&gt;&lt;span class="p"&gt;);&lt;/span&gt;

    &lt;span class="c1"&gt;// Check if the number of requests in the time window is less than the maximum allowed&lt;/span&gt;
    &lt;span class="k"&gt;return&lt;/span&gt; &lt;span class="nx"&gt;requestTimestamps&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;length&lt;/span&gt; &lt;span class="o"&gt;&amp;lt;&lt;/span&gt; &lt;span class="nx"&gt;MAX_REQUESTS&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;

&lt;span class="c1"&gt;// Function to make a request&lt;/span&gt;
&lt;span class="kd"&gt;function&lt;/span&gt; &lt;span class="nf"&gt;$fetch&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;url&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="nx"&gt;string&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="nx"&gt;options&lt;/span&gt;&lt;span class="p"&gt;?:&lt;/span&gt; &lt;span class="nx"&gt;RequestInit&lt;/span&gt;&lt;span class="p"&gt;):&lt;/span&gt; &lt;span class="nb"&gt;Promise&lt;/span&gt;&lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="nx"&gt;Response&lt;/span&gt;&lt;span class="o"&gt;&amp;gt;&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
    &lt;span class="k"&gt;if &lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="o"&gt;!&lt;/span&gt;&lt;span class="nf"&gt;canMakeRequest&lt;/span&gt;&lt;span class="p"&gt;())&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
        &lt;span class="c1"&gt;// Inform the caller how long (in seconds) they need to wait&lt;/span&gt;
        &lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;remaining&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="nb"&gt;Math&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;ceil&lt;/span&gt;&lt;span class="p"&gt;((&lt;/span&gt;&lt;span class="nf"&gt;loadCooldownUntil&lt;/span&gt;&lt;span class="p"&gt;()&lt;/span&gt; &lt;span class="o"&gt;-&lt;/span&gt; &lt;span class="nb"&gt;Date&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;now&lt;/span&gt;&lt;span class="p"&gt;())&lt;/span&gt; &lt;span class="o"&gt;/&lt;/span&gt; &lt;span class="mi"&gt;1000&lt;/span&gt;&lt;span class="p"&gt;);&lt;/span&gt;
        &lt;span class="k"&gt;return&lt;/span&gt; &lt;span class="nb"&gt;Promise&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;reject&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;
            &lt;span class="k"&gt;new&lt;/span&gt; &lt;span class="nc"&gt;Error&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="s2"&gt;`Rate limit exceeded. Please try again in &lt;/span&gt;&lt;span class="p"&gt;${&lt;/span&gt;&lt;span class="nx"&gt;remaining&lt;/span&gt;&lt;span class="p"&gt;}&lt;/span&gt;&lt;span class="s2"&gt;s.`&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt;
        &lt;span class="p"&gt;);&lt;/span&gt;
    &lt;span class="p"&gt;}&lt;/span&gt;

    &lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;currentTime&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="nb"&gt;Date&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;now&lt;/span&gt;&lt;span class="p"&gt;();&lt;/span&gt;

    &lt;span class="c1"&gt;// Load, update, and persist timestamps before making the request&lt;/span&gt;
    &lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;requestTimestamps&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="nf"&gt;loadTimestamps&lt;/span&gt;&lt;span class="p"&gt;();&lt;/span&gt;
    &lt;span class="nx"&gt;requestTimestamps&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;push&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;currentTime&lt;/span&gt;&lt;span class="p"&gt;);&lt;/span&gt;
    &lt;span class="nf"&gt;saveTimestamps&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;requestTimestamps&lt;/span&gt;&lt;span class="p"&gt;);&lt;/span&gt;

    &lt;span class="c1"&gt;// If this request tips us over the limit, start a cooldown period.&lt;/span&gt;
    &lt;span class="c1"&gt;// The cooldown begins NOW and lasts COOLDOWN_TIME ms, after which&lt;/span&gt;
    &lt;span class="c1"&gt;// canMakeRequest() will unblock and the sliding window will have cleared.&lt;/span&gt;
    &lt;span class="k"&gt;if &lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;requestTimestamps&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;length&lt;/span&gt; &lt;span class="o"&gt;&amp;gt;=&lt;/span&gt; &lt;span class="nx"&gt;MAX_REQUESTS&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
        &lt;span class="nf"&gt;saveCooldownUntil&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;currentTime&lt;/span&gt; &lt;span class="o"&gt;+&lt;/span&gt; &lt;span class="nx"&gt;COOLDOWN_TIME&lt;/span&gt;&lt;span class="p"&gt;);&lt;/span&gt;
    &lt;span class="p"&gt;}&lt;/span&gt;

    &lt;span class="c1"&gt;// Make the actual fetch request&lt;/span&gt;
    &lt;span class="k"&gt;return&lt;/span&gt; &lt;span class="nf"&gt;fetch&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;url&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="nx"&gt;options&lt;/span&gt;&lt;span class="p"&gt;);&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;

&lt;span class="k"&gt;export&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt; &lt;span class="nx"&gt;$fetch&lt;/span&gt; &lt;span class="p"&gt;};&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;






&lt;p&gt;Whenever you need to make a request to the backend, just use &lt;code&gt;$fetch&lt;/code&gt; instead of the native &lt;code&gt;fetch&lt;/code&gt;:&lt;br&gt;
&lt;/p&gt;

&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight typescript"&gt;&lt;code&gt;&lt;span class="c1"&gt;// example usage&lt;/span&gt;
&lt;span class="k"&gt;import&lt;/span&gt; &lt;span class="nx"&gt;$fetch&lt;/span&gt; &lt;span class="k"&gt;from&lt;/span&gt; &lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="s1"&gt;utils/rate-limiter&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;

&lt;span class="k"&gt;try&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
    &lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;data&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="k"&gt;await&lt;/span&gt; &lt;span class="nf"&gt;$fetch&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="s1"&gt;/api/get-data&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
        &lt;span class="na"&gt;method&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="s1"&gt;POST&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt;
        &lt;span class="na"&gt;body&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="nx"&gt;JSON&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;stringify&lt;/span&gt;&lt;span class="p"&gt;({&lt;/span&gt; &lt;span class="na"&gt;key&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="s1"&gt;value&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt; &lt;span class="p"&gt;})&lt;/span&gt;
    &lt;span class="p"&gt;});&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt; &lt;span class="k"&gt;catch &lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;error&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
    &lt;span class="nx"&gt;console&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;error&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;error&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;message&lt;/span&gt;&lt;span class="p"&gt;);&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;






&lt;blockquote&gt;
&lt;p&gt;⚠️ &lt;strong&gt;Warning:&lt;/strong&gt; This will prevent the vast majority of users from flooding your backend, but a determined minority and AI bots may attempt to bypass client-side checks entirely. &lt;strong&gt;Backend rate limiting must still be in place&lt;/strong&gt; as your true line of defense. Think of frontend rate limiting as an optimization layer, not a security layer.&lt;/p&gt;
&lt;/blockquote&gt;




&lt;h2&gt;
  
  
  When to Use Frontend Rate Limiting
&lt;/h2&gt;

&lt;ul&gt;
&lt;li&gt;Your app has a high volume of users and you want to reduce unnecessary backend load&lt;/li&gt;
&lt;li&gt;The endpoint being called is expensive (e.g., hits a third-party API, runs a heavy DB query)&lt;/li&gt;
&lt;li&gt;You want to improve UX by giving users instant feedback instead of waiting for a backend &lt;code&gt;429&lt;/code&gt; response&lt;/li&gt;
&lt;li&gt;You want to reduce cloud costs on services that charge per request or per DB operation&lt;/li&gt;
&lt;/ul&gt;

&lt;h2&gt;
  
  
  When &lt;em&gt;Not&lt;/em&gt; to Use Frontend Rate Limiting
&lt;/h2&gt;

&lt;ul&gt;
&lt;li&gt;As a &lt;strong&gt;replacement&lt;/strong&gt; for backend rate limiting — it is never a substitute&lt;/li&gt;
&lt;li&gt;For protecting sensitive or security-critical endpoints (authentication, payments, etc.)&lt;/li&gt;
&lt;li&gt;When your users are primarily API consumers or developers who interact directly with your backend&lt;/li&gt;
&lt;li&gt;When the client environment is untrusted (e.g., mobile apps that can be reverse-engineered or patched)&lt;/li&gt;
&lt;li&gt;When accurate rate limiting is a hard requirement — client-side state can be reset simply by refreshing the page&lt;/li&gt;
&lt;/ul&gt;

&lt;p&gt;&lt;a href="https://www.gitmission.com/" rel="noopener noreferrer"&gt;&lt;img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fwzzlb8ltgzwelahgpuyy.png" alt="GitMission Preview" width="799" height="471"&gt;&lt;/a&gt;&lt;/p&gt;

</description>
      <category>webdev</category>
      <category>programming</category>
      <category>coding</category>
      <category>javascript</category>
    </item>
    <item>
      <title>Your trycatch sucks - lets fix it</title>
      <dc:creator>Shuvo</dc:creator>
      <pubDate>Thu, 21 May 2026 03:19:50 +0000</pubDate>
      <link>https://dev.to/0shuvo0/your-trycatch-sucks-lets-fix-it-37e9</link>
      <guid>https://dev.to/0shuvo0/your-trycatch-sucks-lets-fix-it-37e9</guid>
      <description>&lt;blockquote&gt;
&lt;p&gt;You're not handling errors. You're &lt;em&gt;hiding&lt;/em&gt; them.&lt;/p&gt;
&lt;/blockquote&gt;

&lt;p&gt;Every app crashes. Every API fails. Every database hiccups at 2am on a Friday.&lt;br&gt;
The difference between a good dev and a great one? &lt;strong&gt;What happens next.&lt;/strong&gt;&lt;/p&gt;

&lt;p&gt;Let's roast your error handling — then make it legendary.&lt;/p&gt;


&lt;h2&gt;
  
  
  🤦 Level 0: The "Trust Me Bro" Dev
&lt;/h2&gt;

&lt;p&gt;No try/catch at all. Just vibes.&lt;br&gt;
&lt;/p&gt;

&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight javascript"&gt;&lt;code&gt;&lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;data&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="k"&gt;await&lt;/span&gt; &lt;span class="nf"&gt;fetchUserData&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;userId&lt;/span&gt;&lt;span class="p"&gt;);&lt;/span&gt;
&lt;span class="nx"&gt;console&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;log&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;data&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;profile&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;name&lt;/span&gt;&lt;span class="p"&gt;);&lt;/span&gt; &lt;span class="c1"&gt;// 💥 TypeError: Cannot read properties of undefined&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;



&lt;p&gt;&lt;strong&gt;The crime:&lt;/strong&gt; One bad response nukes the entire app. Users see a white screen. You get a 3am Slack ping.&lt;/p&gt;




&lt;h2&gt;
  
  
  🐣 Level 1: The Junior — "I Googled try/catch"
&lt;/h2&gt;



&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight javascript"&gt;&lt;code&gt;&lt;span class="k"&gt;try&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
  &lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;data&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="k"&gt;await&lt;/span&gt; &lt;span class="nf"&gt;fetchUserData&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;userId&lt;/span&gt;&lt;span class="p"&gt;);&lt;/span&gt;
  &lt;span class="nf"&gt;setUser&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;data&lt;/span&gt;&lt;span class="p"&gt;);&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt; &lt;span class="k"&gt;catch &lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;err&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
  &lt;span class="nx"&gt;console&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;log&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;err&lt;/span&gt;&lt;span class="p"&gt;);&lt;/span&gt; &lt;span class="c1"&gt;// 👈 and... that's it. shipped.&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;



&lt;p&gt;&lt;strong&gt;What's wrong here?&lt;/strong&gt;&lt;/p&gt;

&lt;ul&gt;
&lt;li&gt;
&lt;code&gt;console.log&lt;/code&gt; in production helps &lt;em&gt;nobody&lt;/em&gt; — users still see a broken UI&lt;/li&gt;
&lt;li&gt;No distinction between a 404 and a 500 — every error is treated the same&lt;/li&gt;
&lt;li&gt;The error disappears into the void (or a DevTools tab nobody has open)&lt;/li&gt;
&lt;li&gt;
&lt;code&gt;err&lt;/code&gt; might be &lt;code&gt;null&lt;/code&gt;, a string, or an &lt;code&gt;Error&lt;/code&gt; object — you're not checking&lt;/li&gt;
&lt;/ul&gt;

&lt;p&gt;&lt;strong&gt;The mindset:&lt;/strong&gt; &lt;em&gt;"At least it won't crash."&lt;/em&gt; — Yeah, it just silently breaks instead. Cool.&lt;/p&gt;

&lt;p&gt;&lt;a href="https://www.gitmission.com/" rel="noopener noreferrer"&gt;&lt;img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fwzzlb8ltgzwelahgpuyy.png" alt="GitMission Preview" width="799" height="471"&gt;&lt;/a&gt;&lt;/p&gt;




&lt;h2&gt;
  
  
  📈 Level 2: The Mid-Level — "I've Been Burned Before"
&lt;/h2&gt;

&lt;p&gt;Now we're thinking. You've seen production fires. You have trust issues with APIs. Good.&lt;/p&gt;

&lt;h3&gt;
  
  
  2a — Typed errors, real messages
&lt;/h3&gt;



&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight javascript"&gt;&lt;code&gt;&lt;span class="k"&gt;try&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
  &lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;data&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="k"&gt;await&lt;/span&gt; &lt;span class="nf"&gt;fetchUserData&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;userId&lt;/span&gt;&lt;span class="p"&gt;);&lt;/span&gt;
  &lt;span class="nf"&gt;setUser&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;data&lt;/span&gt;&lt;span class="p"&gt;);&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt; &lt;span class="k"&gt;catch &lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;err&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
  &lt;span class="k"&gt;if &lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;err&lt;/span&gt; &lt;span class="k"&gt;instanceof&lt;/span&gt; &lt;span class="nx"&gt;NetworkError&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
    &lt;span class="nf"&gt;showToast&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;Connection lost. Check your internet.&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;warning&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="p"&gt;);&lt;/span&gt;
  &lt;span class="p"&gt;}&lt;/span&gt; &lt;span class="k"&gt;else&lt;/span&gt; &lt;span class="k"&gt;if &lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;err&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;status&lt;/span&gt; &lt;span class="o"&gt;===&lt;/span&gt; &lt;span class="mi"&gt;404&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
    &lt;span class="nf"&gt;showToast&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;User not found.&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;error&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="p"&gt;);&lt;/span&gt;
  &lt;span class="p"&gt;}&lt;/span&gt; &lt;span class="k"&gt;else&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
    &lt;span class="nf"&gt;showToast&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;Something went wrong. We're on it.&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;error&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="p"&gt;);&lt;/span&gt;
    &lt;span class="nx"&gt;logger&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;error&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;[fetchUserData]&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt; &lt;span class="nx"&gt;userId&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="nx"&gt;err&lt;/span&gt; &lt;span class="p"&gt;});&lt;/span&gt; &lt;span class="c1"&gt;// 👈 goes to Sentry/Datadog&lt;/span&gt;
  &lt;span class="p"&gt;}&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;



&lt;p&gt;✅ Users get &lt;em&gt;useful&lt;/em&gt; feedback, not a frozen screen&lt;br&gt;
✅ Engineers get &lt;em&gt;structured logs&lt;/em&gt;, not a haystack of &lt;code&gt;console.log&lt;/code&gt;s&lt;/p&gt;


&lt;h3&gt;
  
  
  2b — Undo previous operations (the "atomic mindset")
&lt;/h3&gt;

&lt;p&gt;Imagine you're updating a user's profile &lt;em&gt;and&lt;/em&gt; their avatar. Step 1 succeeds. Step 2 fails.&lt;br&gt;
Congrats — your user now has a corrupted half-state.&lt;br&gt;
&lt;/p&gt;

&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight javascript"&gt;&lt;code&gt;&lt;span class="kd"&gt;let&lt;/span&gt; &lt;span class="nx"&gt;previousProfile&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="kc"&gt;null&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;

&lt;span class="k"&gt;try&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
  &lt;span class="nx"&gt;previousProfile&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="k"&gt;await&lt;/span&gt; &lt;span class="nf"&gt;getProfile&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;userId&lt;/span&gt;&lt;span class="p"&gt;);&lt;/span&gt; &lt;span class="c1"&gt;// snapshot&lt;/span&gt;
  &lt;span class="k"&gt;await&lt;/span&gt; &lt;span class="nf"&gt;updateProfile&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;userId&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="nx"&gt;newProfileData&lt;/span&gt;&lt;span class="p"&gt;);&lt;/span&gt; &lt;span class="c1"&gt;// step 1&lt;/span&gt;
  &lt;span class="k"&gt;await&lt;/span&gt; &lt;span class="nf"&gt;uploadAvatar&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;userId&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="nx"&gt;newAvatar&lt;/span&gt;&lt;span class="p"&gt;);&lt;/span&gt;        &lt;span class="c1"&gt;// step 2 💥 fails here&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt; &lt;span class="k"&gt;catch &lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;err&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
  &lt;span class="nx"&gt;logger&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;error&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;Profile update failed&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt; &lt;span class="nx"&gt;err&lt;/span&gt; &lt;span class="p"&gt;});&lt;/span&gt;

  &lt;span class="c1"&gt;// ↩️ Roll back step 1 since step 2 failed&lt;/span&gt;
  &lt;span class="k"&gt;if &lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;previousProfile&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
    &lt;span class="k"&gt;await&lt;/span&gt; &lt;span class="nf"&gt;updateProfile&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;userId&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="nx"&gt;previousProfile&lt;/span&gt;&lt;span class="p"&gt;);&lt;/span&gt;
  &lt;span class="p"&gt;}&lt;/span&gt;

  &lt;span class="nf"&gt;showToast&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;Update failed. Your profile has been restored.&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;warning&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="p"&gt;);&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;



&lt;p&gt;✅ Users never see broken half-state&lt;br&gt;
✅ Rollback is &lt;em&gt;explicit&lt;/em&gt;, not accidental&lt;/p&gt;


&lt;h3&gt;
  
  
  2c — Wrap it in a clean utility (stop repeating yourself)
&lt;/h3&gt;

&lt;p&gt;Tired of writing &lt;code&gt;try/catch&lt;/code&gt; 50 times? Make a helper:&lt;br&gt;
&lt;/p&gt;

&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight javascript"&gt;&lt;code&gt;&lt;span class="c1"&gt;// utils/tryCatch.js&lt;/span&gt;
&lt;span class="k"&gt;export&lt;/span&gt; &lt;span class="k"&gt;async&lt;/span&gt; &lt;span class="kd"&gt;function&lt;/span&gt; &lt;span class="nf"&gt;tryCatch&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;fn&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="nx"&gt;fallback&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="kc"&gt;null&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
  &lt;span class="k"&gt;try&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
    &lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;result&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="k"&gt;await&lt;/span&gt; &lt;span class="nf"&gt;fn&lt;/span&gt;&lt;span class="p"&gt;();&lt;/span&gt;
    &lt;span class="k"&gt;return&lt;/span&gt; &lt;span class="p"&gt;[&lt;/span&gt;&lt;span class="nx"&gt;result&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="kc"&gt;null&lt;/span&gt;&lt;span class="p"&gt;];&lt;/span&gt;
  &lt;span class="p"&gt;}&lt;/span&gt; &lt;span class="k"&gt;catch &lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;err&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
    &lt;span class="k"&gt;return&lt;/span&gt; &lt;span class="p"&gt;[&lt;/span&gt;&lt;span class="nx"&gt;fallback&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="nx"&gt;err&lt;/span&gt;&lt;span class="p"&gt;];&lt;/span&gt;
  &lt;span class="p"&gt;}&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;

&lt;span class="c1"&gt;// Usage — clean, flat, readable&lt;/span&gt;
&lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="p"&gt;[&lt;/span&gt;&lt;span class="nx"&gt;user&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="nx"&gt;err&lt;/span&gt;&lt;span class="p"&gt;]&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="k"&gt;await&lt;/span&gt; &lt;span class="nf"&gt;tryCatch&lt;/span&gt;&lt;span class="p"&gt;(()&lt;/span&gt; &lt;span class="o"&gt;=&amp;gt;&lt;/span&gt; &lt;span class="nf"&gt;fetchUserData&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;userId&lt;/span&gt;&lt;span class="p"&gt;));&lt;/span&gt;

&lt;span class="k"&gt;if &lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;err&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
  &lt;span class="nf"&gt;showToast&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;Couldn't load user.&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;error&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="p"&gt;);&lt;/span&gt;
  &lt;span class="k"&gt;return&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;

&lt;span class="nf"&gt;setUser&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;user&lt;/span&gt;&lt;span class="p"&gt;);&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;



&lt;p&gt;✅ No more deeply nested try/catch pyramids&lt;br&gt;
✅ Forces you to &lt;em&gt;handle&lt;/em&gt; the error at call site — can't ignore it&lt;/p&gt;


&lt;h2&gt;
  
  
  🧠 Level 3: The Senior — "I've Seen Things"
&lt;/h2&gt;

&lt;p&gt;You don't just &lt;em&gt;catch&lt;/em&gt; errors. You &lt;em&gt;anticipate&lt;/em&gt; them. You build systems that heal themselves.&lt;/p&gt;
&lt;h3&gt;
  
  
  3a — Retry queue with exponential backoff
&lt;/h3&gt;

&lt;p&gt;Networks are flaky. Don't give up on the first failure.&lt;br&gt;
&lt;/p&gt;

&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight javascript"&gt;&lt;code&gt;&lt;span class="k"&gt;async&lt;/span&gt; &lt;span class="kd"&gt;function&lt;/span&gt; &lt;span class="nf"&gt;fetchWithRetry&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;fn&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt; &lt;span class="nx"&gt;retries&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="mi"&gt;3&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="nx"&gt;delay&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="mi"&gt;500&lt;/span&gt; &lt;span class="p"&gt;}&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="p"&gt;{})&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
  &lt;span class="k"&gt;for &lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="kd"&gt;let&lt;/span&gt; &lt;span class="nx"&gt;attempt&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="mi"&gt;1&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt; &lt;span class="nx"&gt;attempt&lt;/span&gt; &lt;span class="o"&gt;&amp;lt;=&lt;/span&gt; &lt;span class="nx"&gt;retries&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt; &lt;span class="nx"&gt;attempt&lt;/span&gt;&lt;span class="o"&gt;++&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
    &lt;span class="k"&gt;try&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
      &lt;span class="k"&gt;return&lt;/span&gt; &lt;span class="k"&gt;await&lt;/span&gt; &lt;span class="nf"&gt;fn&lt;/span&gt;&lt;span class="p"&gt;();&lt;/span&gt;
    &lt;span class="p"&gt;}&lt;/span&gt; &lt;span class="k"&gt;catch &lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;err&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
      &lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;isLast&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="nx"&gt;attempt&lt;/span&gt; &lt;span class="o"&gt;===&lt;/span&gt; &lt;span class="nx"&gt;retries&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
      &lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;isRetryable&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="nx"&gt;err&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;status&lt;/span&gt; &lt;span class="o"&gt;&amp;gt;=&lt;/span&gt; &lt;span class="mi"&gt;500&lt;/span&gt; &lt;span class="o"&gt;||&lt;/span&gt; &lt;span class="nx"&gt;err&lt;/span&gt; &lt;span class="k"&gt;instanceof&lt;/span&gt; &lt;span class="nx"&gt;NetworkError&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;

      &lt;span class="k"&gt;if &lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;isLast&lt;/span&gt; &lt;span class="o"&gt;||&lt;/span&gt; &lt;span class="o"&gt;!&lt;/span&gt;&lt;span class="nx"&gt;isRetryable&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="k"&gt;throw&lt;/span&gt; &lt;span class="nx"&gt;err&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt; &lt;span class="c1"&gt;// don't retry 401s or 404s&lt;/span&gt;

      &lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;backoff&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="nx"&gt;delay&lt;/span&gt; &lt;span class="o"&gt;*&lt;/span&gt; &lt;span class="mi"&gt;2&lt;/span&gt; &lt;span class="o"&gt;**&lt;/span&gt; &lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;attempt&lt;/span&gt; &lt;span class="o"&gt;-&lt;/span&gt; &lt;span class="mi"&gt;1&lt;/span&gt;&lt;span class="p"&gt;);&lt;/span&gt; &lt;span class="c1"&gt;// 500ms → 1s → 2s&lt;/span&gt;
      &lt;span class="nx"&gt;logger&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;warn&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="s2"&gt;`Attempt &lt;/span&gt;&lt;span class="p"&gt;${&lt;/span&gt;&lt;span class="nx"&gt;attempt&lt;/span&gt;&lt;span class="p"&gt;}&lt;/span&gt;&lt;span class="s2"&gt; failed. Retrying in &lt;/span&gt;&lt;span class="p"&gt;${&lt;/span&gt;&lt;span class="nx"&gt;backoff&lt;/span&gt;&lt;span class="p"&gt;}&lt;/span&gt;&lt;span class="s2"&gt;ms...`&lt;/span&gt;&lt;span class="p"&gt;);&lt;/span&gt;
      &lt;span class="k"&gt;await&lt;/span&gt; &lt;span class="nf"&gt;sleep&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;backoff&lt;/span&gt;&lt;span class="p"&gt;);&lt;/span&gt;
    &lt;span class="p"&gt;}&lt;/span&gt;
  &lt;span class="p"&gt;}&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;

&lt;span class="c1"&gt;// Usage&lt;/span&gt;
&lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;data&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="k"&gt;await&lt;/span&gt; &lt;span class="nf"&gt;fetchWithRetry&lt;/span&gt;&lt;span class="p"&gt;(()&lt;/span&gt; &lt;span class="o"&gt;=&amp;gt;&lt;/span&gt; &lt;span class="nf"&gt;fetchUserData&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;userId&lt;/span&gt;&lt;span class="p"&gt;));&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;



&lt;p&gt;✅ Temporary blips are invisible to users&lt;br&gt;
✅ Smart: retries server errors, not client errors (no point retrying a 401)&lt;/p&gt;


&lt;h3&gt;
  
  
  3b — Circuit breaker (stop hammering a dead service)
&lt;/h3&gt;

&lt;p&gt;A retry queue is great — unless the &lt;em&gt;whole service is down&lt;/em&gt;. Then you're just DDoS-ing a corpse.&lt;br&gt;
&lt;/p&gt;

&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight javascript"&gt;&lt;code&gt;&lt;span class="kd"&gt;class&lt;/span&gt; &lt;span class="nc"&gt;CircuitBreaker&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
  &lt;span class="nf"&gt;constructor&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;threshold&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="mi"&gt;5&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="nx"&gt;timeout&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="mi"&gt;30&lt;/span&gt;&lt;span class="nx"&gt;_000&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
    &lt;span class="k"&gt;this&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;failures&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="mi"&gt;0&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
    &lt;span class="k"&gt;this&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;threshold&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="nx"&gt;threshold&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
    &lt;span class="k"&gt;this&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;timeout&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="nx"&gt;timeout&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
    &lt;span class="k"&gt;this&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;state&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;CLOSED&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt; &lt;span class="c1"&gt;// CLOSED = healthy, OPEN = tripped, HALF_OPEN = testing&lt;/span&gt;
    &lt;span class="k"&gt;this&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;nextAttempt&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="nb"&gt;Date&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;now&lt;/span&gt;&lt;span class="p"&gt;();&lt;/span&gt;
  &lt;span class="p"&gt;}&lt;/span&gt;

  &lt;span class="k"&gt;async&lt;/span&gt; &lt;span class="nf"&gt;call&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;fn&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
    &lt;span class="k"&gt;if &lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="k"&gt;this&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;state&lt;/span&gt; &lt;span class="o"&gt;===&lt;/span&gt; &lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;OPEN&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
      &lt;span class="k"&gt;if &lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nb"&gt;Date&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;now&lt;/span&gt;&lt;span class="p"&gt;()&lt;/span&gt; &lt;span class="o"&gt;&amp;lt;&lt;/span&gt; &lt;span class="k"&gt;this&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;nextAttempt&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
        &lt;span class="k"&gt;throw&lt;/span&gt; &lt;span class="k"&gt;new&lt;/span&gt; &lt;span class="nc"&gt;Error&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;Circuit open — service unavailable&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="p"&gt;);&lt;/span&gt;
      &lt;span class="p"&gt;}&lt;/span&gt;
      &lt;span class="k"&gt;this&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;state&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;HALF_OPEN&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
    &lt;span class="p"&gt;}&lt;/span&gt;

    &lt;span class="k"&gt;try&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
      &lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;result&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="k"&gt;await&lt;/span&gt; &lt;span class="nf"&gt;fn&lt;/span&gt;&lt;span class="p"&gt;();&lt;/span&gt;
      &lt;span class="k"&gt;this&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;reset&lt;/span&gt;&lt;span class="p"&gt;();&lt;/span&gt;
      &lt;span class="k"&gt;return&lt;/span&gt; &lt;span class="nx"&gt;result&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
    &lt;span class="p"&gt;}&lt;/span&gt; &lt;span class="k"&gt;catch &lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;err&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
      &lt;span class="k"&gt;this&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;recordFailure&lt;/span&gt;&lt;span class="p"&gt;();&lt;/span&gt;
      &lt;span class="k"&gt;throw&lt;/span&gt; &lt;span class="nx"&gt;err&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
    &lt;span class="p"&gt;}&lt;/span&gt;
  &lt;span class="p"&gt;}&lt;/span&gt;

  &lt;span class="nf"&gt;recordFailure&lt;/span&gt;&lt;span class="p"&gt;()&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
    &lt;span class="k"&gt;this&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;failures&lt;/span&gt;&lt;span class="o"&gt;++&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
    &lt;span class="k"&gt;if &lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="k"&gt;this&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;failures&lt;/span&gt; &lt;span class="o"&gt;&amp;gt;=&lt;/span&gt; &lt;span class="k"&gt;this&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;threshold&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
      &lt;span class="k"&gt;this&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;state&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;OPEN&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
      &lt;span class="k"&gt;this&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;nextAttempt&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="nb"&gt;Date&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;now&lt;/span&gt;&lt;span class="p"&gt;()&lt;/span&gt; &lt;span class="o"&gt;+&lt;/span&gt; &lt;span class="k"&gt;this&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;timeout&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
      &lt;span class="nx"&gt;logger&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;error&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;🔴 Circuit breaker TRIPPED&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="p"&gt;);&lt;/span&gt;
    &lt;span class="p"&gt;}&lt;/span&gt;
  &lt;span class="p"&gt;}&lt;/span&gt;

  &lt;span class="nf"&gt;reset&lt;/span&gt;&lt;span class="p"&gt;()&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
    &lt;span class="k"&gt;this&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;failures&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="mi"&gt;0&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
    &lt;span class="k"&gt;this&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;state&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;CLOSED&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
  &lt;span class="p"&gt;}&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;

&lt;span class="c1"&gt;// Usage&lt;/span&gt;
&lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;userServiceBreaker&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="k"&gt;new&lt;/span&gt; &lt;span class="nc"&gt;CircuitBreaker&lt;/span&gt;&lt;span class="p"&gt;();&lt;/span&gt;
&lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;data&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="k"&gt;await&lt;/span&gt; &lt;span class="nx"&gt;userServiceBreaker&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;call&lt;/span&gt;&lt;span class="p"&gt;(()&lt;/span&gt; &lt;span class="o"&gt;=&amp;gt;&lt;/span&gt; &lt;span class="nf"&gt;fetchUserData&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;userId&lt;/span&gt;&lt;span class="p"&gt;));&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;



&lt;p&gt;✅ Failing fast is &lt;em&gt;kind&lt;/em&gt; — users get an error immediately, not after 10s of retrying&lt;br&gt;
✅ Gives the downstream service a breather to recover&lt;/p&gt;


&lt;h3&gt;
  
  
  3c — Structured error classes (errors that &lt;em&gt;mean something&lt;/em&gt;)
&lt;/h3&gt;

&lt;p&gt;Stop throwing raw strings or generic &lt;code&gt;Error&lt;/code&gt;s. Give your errors context.&lt;br&gt;
&lt;/p&gt;

&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight javascript"&gt;&lt;code&gt;&lt;span class="kd"&gt;class&lt;/span&gt; &lt;span class="nc"&gt;AppError&lt;/span&gt; &lt;span class="kd"&gt;extends&lt;/span&gt; &lt;span class="nc"&gt;Error&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
  &lt;span class="nf"&gt;constructor&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;message&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt; &lt;span class="nx"&gt;code&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="nx"&gt;statusCode&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="mi"&gt;500&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="nx"&gt;context&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="p"&gt;{},&lt;/span&gt; &lt;span class="nx"&gt;retryable&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="kc"&gt;false&lt;/span&gt; &lt;span class="p"&gt;}&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="p"&gt;{})&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
    &lt;span class="k"&gt;super&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;message&lt;/span&gt;&lt;span class="p"&gt;);&lt;/span&gt;
    &lt;span class="k"&gt;this&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;name&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;AppError&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
    &lt;span class="k"&gt;this&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;code&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="nx"&gt;code&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
    &lt;span class="k"&gt;this&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;statusCode&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="nx"&gt;statusCode&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
    &lt;span class="k"&gt;this&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;context&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="nx"&gt;context&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
    &lt;span class="k"&gt;this&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;retryable&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="nx"&gt;retryable&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
    &lt;span class="k"&gt;this&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;timestamp&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="k"&gt;new&lt;/span&gt; &lt;span class="nc"&gt;Date&lt;/span&gt;&lt;span class="p"&gt;().&lt;/span&gt;&lt;span class="nf"&gt;toISOString&lt;/span&gt;&lt;span class="p"&gt;();&lt;/span&gt;
  &lt;span class="p"&gt;}&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;

&lt;span class="c1"&gt;// Subclass for specificity&lt;/span&gt;
&lt;span class="kd"&gt;class&lt;/span&gt; &lt;span class="nc"&gt;AuthError&lt;/span&gt; &lt;span class="kd"&gt;extends&lt;/span&gt; &lt;span class="nc"&gt;AppError&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
  &lt;span class="nf"&gt;constructor&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;message&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="nx"&gt;context&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
    &lt;span class="k"&gt;super&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;message&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt; &lt;span class="na"&gt;code&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;AUTH_ERROR&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="na"&gt;statusCode&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="mi"&gt;401&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="nx"&gt;context&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="na"&gt;retryable&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="kc"&gt;false&lt;/span&gt; &lt;span class="p"&gt;});&lt;/span&gt;
  &lt;span class="p"&gt;}&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;

&lt;span class="kd"&gt;class&lt;/span&gt; &lt;span class="nc"&gt;ServiceUnavailableError&lt;/span&gt; &lt;span class="kd"&gt;extends&lt;/span&gt; &lt;span class="nc"&gt;AppError&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
  &lt;span class="nf"&gt;constructor&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;service&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="nx"&gt;context&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
    &lt;span class="k"&gt;super&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="s2"&gt;`&lt;/span&gt;&lt;span class="p"&gt;${&lt;/span&gt;&lt;span class="nx"&gt;service&lt;/span&gt;&lt;span class="p"&gt;}&lt;/span&gt;&lt;span class="s2"&gt; is unavailable`&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt; &lt;span class="na"&gt;code&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;SERVICE_DOWN&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="na"&gt;statusCode&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="mi"&gt;503&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="nx"&gt;context&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="na"&gt;retryable&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="kc"&gt;true&lt;/span&gt; &lt;span class="p"&gt;});&lt;/span&gt;
  &lt;span class="p"&gt;}&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;

&lt;span class="c1"&gt;// Throwing&lt;/span&gt;
&lt;span class="k"&gt;throw&lt;/span&gt; &lt;span class="k"&gt;new&lt;/span&gt; &lt;span class="nc"&gt;ServiceUnavailableError&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;UserService&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt; &lt;span class="nx"&gt;userId&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="na"&gt;attempt&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="mi"&gt;3&lt;/span&gt; &lt;span class="p"&gt;});&lt;/span&gt;

&lt;span class="c1"&gt;// Catching&lt;/span&gt;
&lt;span class="k"&gt;catch &lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;err&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
  &lt;span class="k"&gt;if &lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;err&lt;/span&gt; &lt;span class="k"&gt;instanceof&lt;/span&gt; &lt;span class="nx"&gt;AuthError&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
    &lt;span class="nf"&gt;redirectToLogin&lt;/span&gt;&lt;span class="p"&gt;();&lt;/span&gt;
  &lt;span class="p"&gt;}&lt;/span&gt; &lt;span class="k"&gt;else&lt;/span&gt; &lt;span class="k"&gt;if &lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;err&lt;/span&gt; &lt;span class="k"&gt;instanceof&lt;/span&gt; &lt;span class="nx"&gt;AppError&lt;/span&gt; &lt;span class="o"&gt;&amp;amp;&amp;amp;&lt;/span&gt; &lt;span class="nx"&gt;err&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;retryable&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
    &lt;span class="nx"&gt;retryQueue&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;add&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;err&lt;/span&gt;&lt;span class="p"&gt;);&lt;/span&gt;
  &lt;span class="p"&gt;}&lt;/span&gt; &lt;span class="k"&gt;else&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
    &lt;span class="nx"&gt;logger&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;error&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;err&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;code&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="nx"&gt;err&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;context&lt;/span&gt;&lt;span class="p"&gt;);&lt;/span&gt;
    &lt;span class="nf"&gt;showToast&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;Unexpected error. Engineers notified.&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="p"&gt;);&lt;/span&gt;
  &lt;span class="p"&gt;}&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;



&lt;p&gt;✅ Catch blocks can make &lt;em&gt;decisions&lt;/em&gt;, not just log and pray&lt;br&gt;
✅ Every error carries its own context — no more guessing what happened&lt;/p&gt;




&lt;h2&gt;
  
  
  🗺️ The Full Picture
&lt;/h2&gt;

&lt;div class="table-wrapper-paragraph"&gt;&lt;table&gt;
&lt;thead&gt;
&lt;tr&gt;
&lt;th&gt;What you do&lt;/th&gt;
&lt;th&gt;Junior&lt;/th&gt;
&lt;th&gt;Mid&lt;/th&gt;
&lt;th&gt;Senior&lt;/th&gt;
&lt;/tr&gt;
&lt;/thead&gt;
&lt;tbody&gt;
&lt;tr&gt;
&lt;td&gt;Catch errors&lt;/td&gt;
&lt;td&gt;✅&lt;/td&gt;
&lt;td&gt;✅&lt;/td&gt;
&lt;td&gt;✅&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td&gt;Inform the user&lt;/td&gt;
&lt;td&gt;❌&lt;/td&gt;
&lt;td&gt;✅&lt;/td&gt;
&lt;td&gt;✅&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td&gt;Send to a logger&lt;/td&gt;
&lt;td&gt;❌&lt;/td&gt;
&lt;td&gt;✅&lt;/td&gt;
&lt;td&gt;✅&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td&gt;Typed/structured errors&lt;/td&gt;
&lt;td&gt;❌&lt;/td&gt;
&lt;td&gt;⚠️ partial&lt;/td&gt;
&lt;td&gt;✅&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td&gt;Rollback on failure&lt;/td&gt;
&lt;td&gt;❌&lt;/td&gt;
&lt;td&gt;✅&lt;/td&gt;
&lt;td&gt;✅&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td&gt;Retry transient errors&lt;/td&gt;
&lt;td&gt;❌&lt;/td&gt;
&lt;td&gt;❌&lt;/td&gt;
&lt;td&gt;✅&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td&gt;Circuit breaker&lt;/td&gt;
&lt;td&gt;❌&lt;/td&gt;
&lt;td&gt;❌&lt;/td&gt;
&lt;td&gt;✅&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td&gt;Errors are self-describing&lt;/td&gt;
&lt;td&gt;❌&lt;/td&gt;
&lt;td&gt;❌&lt;/td&gt;
&lt;td&gt;✅&lt;/td&gt;
&lt;/tr&gt;
&lt;/tbody&gt;
&lt;/table&gt;&lt;/div&gt;




&lt;h2&gt;
  
  
  ✅ The Golden Rules
&lt;/h2&gt;

&lt;ol&gt;
&lt;li&gt;
&lt;strong&gt;Never swallow errors silently.&lt;/strong&gt; A hidden bug is a time bomb.&lt;/li&gt;
&lt;li&gt;
&lt;strong&gt;Always tell the user &lt;em&gt;something&lt;/em&gt;.&lt;/strong&gt; Frozen UI is worse than an error message.&lt;/li&gt;
&lt;li&gt;
&lt;strong&gt;Log with context&lt;/strong&gt;, not just a message — &lt;em&gt;what&lt;/em&gt; failed, &lt;em&gt;who&lt;/em&gt; triggered it, &lt;em&gt;when&lt;/em&gt;.&lt;/li&gt;
&lt;li&gt;
&lt;strong&gt;Not all errors are equal&lt;/strong&gt; — 404 ≠ 500 ≠ NetworkError. Handle them differently.&lt;/li&gt;
&lt;li&gt;
&lt;strong&gt;Retryable ≠ always retry&lt;/strong&gt; — client errors (4xx) should fail fast.&lt;/li&gt;
&lt;li&gt;
&lt;strong&gt;Leave the system in a valid state.&lt;/strong&gt; Roll back or compensate when operations are partial.&lt;/li&gt;
&lt;li&gt;
&lt;strong&gt;Your &lt;code&gt;catch&lt;/code&gt; block is business logic&lt;/strong&gt; — treat it that way.&lt;/li&gt;
&lt;/ol&gt;




&lt;blockquote&gt;
&lt;p&gt;"The mark of a great engineer isn't writing code that never fails.&lt;br&gt;&lt;br&gt;
It's writing code that &lt;em&gt;fails gracefully&lt;/em&gt;."&lt;/p&gt;
&lt;/blockquote&gt;

&lt;p&gt;Now go fix your try/catches. 🛠️&lt;/p&gt;

&lt;p&gt;&lt;a href="https://www.gitmission.com/" rel="noopener noreferrer"&gt;&lt;img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fwzzlb8ltgzwelahgpuyy.png" alt="GitMission Preview" width="799" height="471"&gt;&lt;/a&gt;&lt;/p&gt;

</description>
      <category>javascript</category>
      <category>coding</category>
      <category>programming</category>
      <category>typescript</category>
    </item>
    <item>
      <title>I Built a Fully Automated YouTube Channel That Uploads Every Day - Without Touching It</title>
      <dc:creator>Shuvo</dc:creator>
      <pubDate>Wed, 20 May 2026 04:57:27 +0000</pubDate>
      <link>https://dev.to/0shuvo0/i-built-a-fully-automated-youtube-channel-that-uploads-every-day-without-touching-it-1a2i</link>
      <guid>https://dev.to/0shuvo0/i-built-a-fully-automated-youtube-channel-that-uploads-every-day-without-touching-it-1a2i</guid>
      <description>&lt;blockquote&gt;
&lt;p&gt;Every morning, a video goes live on my YouTube channel. I didn't film it. I didn't edit it. My computer did all of it while I slept.&lt;/p&gt;
&lt;/blockquote&gt;

&lt;p&gt;Here's the story of how I built &lt;strong&gt;&lt;a href="https://www.youtube.com/@ProgressOfYear" rel="noopener noreferrer"&gt;Progress Bar of the Year&lt;/a&gt;&lt;/strong&gt; - a fully automated YouTube Shorts channel that posts a daily update on how much of the current year has passed - and the surprisingly elegant tech stack behind it.&lt;br&gt;
&lt;a href="https://www.youtube.com/@ProgressOfYear" rel="noopener noreferrer"&gt;&lt;img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2F5wk671r70fzcqoj6kz8z.png" alt="YouTube channel preview" width="799" height="671"&gt;&lt;/a&gt;&lt;/p&gt;


&lt;h2&gt;
  
  
  The Idea: Simple, But Strangely Satisfying
&lt;/h2&gt;

&lt;p&gt;The premise couldn't be simpler: every day, a short video goes up showing &lt;strong&gt;what percentage of the year has elapsed&lt;/strong&gt;, paired with a fun historical fact about something that happened on this same day in a previous year.&lt;/p&gt;

&lt;p&gt;That's it.&lt;/p&gt;

&lt;p&gt;But there's something almost meditative about watching the year tick forward - and something genuinely cool about a channel that &lt;em&gt;runs itself&lt;/em&gt;. No burnout, no filming schedule, no editor. Just code, running quietly on a small computer in the corner.&lt;/p&gt;


&lt;h2&gt;
  
  
  The Tech Stack at a Glance
&lt;/h2&gt;

&lt;div class="table-wrapper-paragraph"&gt;&lt;table&gt;
&lt;thead&gt;
&lt;tr&gt;
&lt;th&gt;Layer&lt;/th&gt;
&lt;th&gt;Tool&lt;/th&gt;
&lt;/tr&gt;
&lt;/thead&gt;
&lt;tbody&gt;
&lt;tr&gt;
&lt;td&gt;Core logic&lt;/td&gt;
&lt;td&gt;JavaScript / TypeScript&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td&gt;Historical facts&lt;/td&gt;
&lt;td&gt;Google Gemini API&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td&gt;Video generation&lt;/td&gt;
&lt;td&gt;Remotion&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td&gt;Upload&lt;/td&gt;
&lt;td&gt;YouTube Data API v3&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td&gt;Automation&lt;/td&gt;
&lt;td&gt;Bash + crontab&lt;/td&gt;
&lt;/tr&gt;
&lt;/tbody&gt;
&lt;/table&gt;&lt;/div&gt;

&lt;p&gt;Let's break down each piece.&lt;/p&gt;



&lt;p&gt;&lt;a href="https://www.gitmission.com/" rel="noopener noreferrer"&gt;&lt;img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fwzzlb8ltgzwelahgpuyy.png" alt=" " width="799" height="471"&gt;&lt;/a&gt;&lt;/p&gt;
&lt;h2&gt;
  
  
  Step 1: The Math - How Much of the Year Has Passed?
&lt;/h2&gt;

&lt;p&gt;&lt;strong&gt;What it does:&lt;/strong&gt; Calculates today's date, the total days in the current year, and the percentage of the year that's gone by.&lt;/p&gt;

&lt;p&gt;&lt;strong&gt;How it works:&lt;/strong&gt; This is pure JavaScript - no libraries needed. The logic boils down to three things:&lt;br&gt;
&lt;/p&gt;

&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight javascript"&gt;&lt;code&gt;&lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;now&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="k"&gt;new&lt;/span&gt; &lt;span class="nc"&gt;Date&lt;/span&gt;&lt;span class="p"&gt;();&lt;/span&gt;
&lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;startOfYear&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="k"&gt;new&lt;/span&gt; &lt;span class="nc"&gt;Date&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;now&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;getFullYear&lt;/span&gt;&lt;span class="p"&gt;(),&lt;/span&gt; &lt;span class="mi"&gt;0&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="mi"&gt;1&lt;/span&gt;&lt;span class="p"&gt;);&lt;/span&gt;
&lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;endOfYear&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="k"&gt;new&lt;/span&gt; &lt;span class="nc"&gt;Date&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;now&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;getFullYear&lt;/span&gt;&lt;span class="p"&gt;()&lt;/span&gt; &lt;span class="o"&gt;+&lt;/span&gt; &lt;span class="mi"&gt;1&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="mi"&gt;0&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="mi"&gt;1&lt;/span&gt;&lt;span class="p"&gt;);&lt;/span&gt;

&lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;elapsed&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="nx"&gt;now&lt;/span&gt; &lt;span class="o"&gt;-&lt;/span&gt; &lt;span class="nx"&gt;startOfYear&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
&lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;total&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="nx"&gt;endOfYear&lt;/span&gt; &lt;span class="o"&gt;-&lt;/span&gt; &lt;span class="nx"&gt;startOfYear&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
&lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;percentage&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="p"&gt;((&lt;/span&gt;&lt;span class="nx"&gt;elapsed&lt;/span&gt; &lt;span class="o"&gt;/&lt;/span&gt; &lt;span class="nx"&gt;total&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="o"&gt;*&lt;/span&gt; &lt;span class="mi"&gt;100&lt;/span&gt;&lt;span class="p"&gt;).&lt;/span&gt;&lt;span class="nf"&gt;toFixed&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="mi"&gt;2&lt;/span&gt;&lt;span class="p"&gt;);&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;



&lt;p&gt;It also accounts for &lt;strong&gt;leap years&lt;/strong&gt; automatically, since &lt;code&gt;endOfYear - startOfYear&lt;/code&gt; will naturally be 366 days in a leap year.&lt;/p&gt;

&lt;p&gt;&lt;strong&gt;Why this approach:&lt;/strong&gt; JavaScript's &lt;code&gt;Date&lt;/code&gt; object handles all the heavy lifting. There's no edge case to manually code - the language figures out whether it's February 28th or 29th, whether we're in a leap year, all of it. Simple and bulletproof.&lt;/p&gt;

&lt;p&gt;&lt;strong&gt;Output:&lt;/strong&gt; A number like &lt;code&gt;38.21&lt;/code&gt; - meaning 38.21% of 2026 has already passed.&lt;/p&gt;




&lt;h2&gt;
  
  
  Step 2: The History Hook - Google Gemini API
&lt;/h2&gt;

&lt;p&gt;&lt;strong&gt;What it does:&lt;/strong&gt; Fetches a genuinely interesting historical event that happened on &lt;strong&gt;this exact calendar day&lt;/strong&gt; in a previous year.&lt;/p&gt;

&lt;p&gt;&lt;strong&gt;Why AI instead of a static database?&lt;/strong&gt; A hardcoded database of historical facts would work - but it would be finite, brittle, and boring to maintain. The Gemini API gives us:&lt;/p&gt;

&lt;ul&gt;
&lt;li&gt;An effectively &lt;strong&gt;unlimited&lt;/strong&gt; and varied set of historical facts&lt;/li&gt;
&lt;li&gt;
&lt;strong&gt;Natural language output&lt;/strong&gt; ready to display on screen&lt;/li&gt;
&lt;li&gt;The ability to request facts in a specific format or tone&lt;/li&gt;
&lt;/ul&gt;

&lt;p&gt;&lt;strong&gt;How it works:&lt;/strong&gt; A prompt is sent to the Gemini API each day with the current month and day, asking for a notable historical event:&lt;br&gt;
&lt;/p&gt;

&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight javascript"&gt;&lt;code&gt;&lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;prompt&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="s2"&gt;`
  Give me one interesting historical event that happened on &lt;/span&gt;&lt;span class="p"&gt;${&lt;/span&gt;&lt;span class="nx"&gt;month&lt;/span&gt;&lt;span class="p"&gt;}&lt;/span&gt;&lt;span class="s2"&gt; &lt;/span&gt;&lt;span class="p"&gt;${&lt;/span&gt;&lt;span class="nx"&gt;day&lt;/span&gt;&lt;span class="p"&gt;}&lt;/span&gt;&lt;span class="s2"&gt; 
  in any previous year. Keep it to 1-2 sentences. Be specific with the year.
`&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;

&lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;response&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="k"&gt;await&lt;/span&gt; &lt;span class="nx"&gt;gemini&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;generateContent&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;prompt&lt;/span&gt;&lt;span class="p"&gt;);&lt;/span&gt;
&lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;fact&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="nx"&gt;response&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;text&lt;/span&gt;&lt;span class="p"&gt;();&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;



&lt;p&gt;The API returns something like: &lt;em&gt;"49 years ago on this day, the first public screening of Star Wars generated enormous excitement among audiences who had never seen anything like it."&lt;/em&gt;&lt;/p&gt;

&lt;p&gt;&lt;strong&gt;Why this matters for the channel:&lt;/strong&gt; It transforms what could be a dry statistics update into something actually worth watching. Every video has a little historical surprise baked in. It gives viewers a reason to come back — not just for the percentage, but for the story of the day.&lt;/p&gt;




&lt;h2&gt;
  
  
  Step 3: Video Generation - Remotion
&lt;/h2&gt;

&lt;p&gt;&lt;strong&gt;What it does:&lt;/strong&gt; Takes the percentage and the historical fact and renders them into a polished, animated MP4 video - entirely in code.&lt;/p&gt;

&lt;p&gt;&lt;strong&gt;What is Remotion?&lt;/strong&gt; Remotion is a framework that lets you &lt;strong&gt;write videos using React&lt;/strong&gt;. Instead of opening Premiere Pro or After Effects, you define your video as a React component. Animations, timing, transitions - all written in TypeScript. Then you render it to an actual video file using Node.js.&lt;/p&gt;

&lt;p&gt;&lt;strong&gt;Why Remotion over other tools?&lt;/strong&gt;&lt;/p&gt;

&lt;ul&gt;
&lt;li&gt;
&lt;strong&gt;Full programmatic control&lt;/strong&gt; - Every pixel, every animation, every timing decision is in code. No manual steps, no GUI.&lt;/li&gt;
&lt;li&gt;
&lt;strong&gt;Consistent output&lt;/strong&gt; - The same code produces the same visual style every single day, automatically.&lt;/li&gt;
&lt;li&gt;
&lt;strong&gt;React-based&lt;/strong&gt; - If you already know React, you're immediately productive.&lt;/li&gt;
&lt;li&gt;
&lt;strong&gt;High quality&lt;/strong&gt; - Remotion renders frame-by-frame at whatever resolution and framerate you specify. The output is a proper video file, not a screen recording.&lt;/li&gt;
&lt;/ul&gt;

&lt;p&gt;&lt;strong&gt;What the video looks like:&lt;/strong&gt; A dark, minimal design with:&lt;/p&gt;

&lt;ul&gt;
&lt;li&gt;The year progress percentage in large type&lt;/li&gt;
&lt;li&gt;A smooth animated progress bar filling to the correct point&lt;/li&gt;
&lt;li&gt;Today's date&lt;/li&gt;
&lt;li&gt;The historical fact rendered as clean text below&lt;/li&gt;
&lt;li&gt;A short looping background animation for visual polish&lt;/li&gt;
&lt;/ul&gt;

&lt;p&gt;The entire &lt;code&gt;VideoTemplate.tsx&lt;/code&gt; component is just a React component with Remotion's &lt;code&gt;&amp;lt;AbsoluteFill&amp;gt;&lt;/code&gt;, &lt;code&gt;&amp;lt;spring&amp;gt;&lt;/code&gt;, and timing hooks to drive the animation.&lt;br&gt;
&lt;/p&gt;

&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight tsx"&gt;&lt;code&gt;&lt;span class="k"&gt;export&lt;/span&gt; &lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;VideoTemplate&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="nx"&gt;React&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;FC&lt;/span&gt;&lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="nx"&gt;VideoProps&lt;/span&gt;&lt;span class="o"&gt;&amp;gt;&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="p"&gt;({&lt;/span&gt; &lt;span class="nx"&gt;percentage&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="nx"&gt;fact&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="nx"&gt;date&lt;/span&gt; &lt;span class="p"&gt;})&lt;/span&gt; &lt;span class="o"&gt;=&amp;gt;&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
  &lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;frame&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="nf"&gt;useCurrentFrame&lt;/span&gt;&lt;span class="p"&gt;();&lt;/span&gt;
  &lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt; &lt;span class="nx"&gt;fps&lt;/span&gt; &lt;span class="p"&gt;}&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="nf"&gt;useVideoConfig&lt;/span&gt;&lt;span class="p"&gt;();&lt;/span&gt;

  &lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;progress&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="nf"&gt;spring&lt;/span&gt;&lt;span class="p"&gt;({&lt;/span&gt; &lt;span class="nx"&gt;frame&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="nx"&gt;fps&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="na"&gt;config&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt; &lt;span class="na"&gt;damping&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="mi"&gt;200&lt;/span&gt; &lt;span class="p"&gt;}&lt;/span&gt; &lt;span class="p"&gt;});&lt;/span&gt;

  &lt;span class="k"&gt;return &lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;
    &lt;span class="p"&gt;&amp;lt;&lt;/span&gt;&lt;span class="nc"&gt;AbsoluteFill&lt;/span&gt; &lt;span class="na"&gt;style&lt;/span&gt;&lt;span class="p"&gt;=&lt;/span&gt;&lt;span class="si"&gt;{&lt;/span&gt;&lt;span class="p"&gt;{&lt;/span&gt; &lt;span class="na"&gt;background&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="s1"&gt;#0f0f1a&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt; &lt;span class="p"&gt;}&lt;/span&gt;&lt;span class="si"&gt;}&lt;/span&gt;&lt;span class="p"&gt;&amp;gt;&lt;/span&gt;
      &lt;span class="p"&gt;&amp;lt;&lt;/span&gt;&lt;span class="nc"&gt;ProgressBar&lt;/span&gt; &lt;span class="na"&gt;width&lt;/span&gt;&lt;span class="p"&gt;=&lt;/span&gt;&lt;span class="si"&gt;{&lt;/span&gt;&lt;span class="nx"&gt;progress&lt;/span&gt; &lt;span class="o"&gt;*&lt;/span&gt; &lt;span class="nx"&gt;percentage&lt;/span&gt;&lt;span class="si"&gt;}&lt;/span&gt; &lt;span class="p"&gt;/&amp;gt;&lt;/span&gt;
      &lt;span class="p"&gt;&amp;lt;&lt;/span&gt;&lt;span class="nc"&gt;PercentageText&lt;/span&gt; &lt;span class="na"&gt;value&lt;/span&gt;&lt;span class="p"&gt;=&lt;/span&gt;&lt;span class="si"&gt;{&lt;/span&gt;&lt;span class="nx"&gt;percentage&lt;/span&gt;&lt;span class="si"&gt;}&lt;/span&gt; &lt;span class="p"&gt;/&amp;gt;&lt;/span&gt;
      &lt;span class="p"&gt;&amp;lt;&lt;/span&gt;&lt;span class="nc"&gt;HistoricalFact&lt;/span&gt; &lt;span class="na"&gt;text&lt;/span&gt;&lt;span class="p"&gt;=&lt;/span&gt;&lt;span class="si"&gt;{&lt;/span&gt;&lt;span class="nx"&gt;fact&lt;/span&gt;&lt;span class="si"&gt;}&lt;/span&gt; &lt;span class="p"&gt;/&amp;gt;&lt;/span&gt;
    &lt;span class="p"&gt;&amp;lt;/&lt;/span&gt;&lt;span class="nc"&gt;AbsoluteFill&lt;/span&gt;&lt;span class="p"&gt;&amp;gt;&lt;/span&gt;
  &lt;span class="p"&gt;);&lt;/span&gt;
&lt;span class="p"&gt;};&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;



&lt;p&gt;Once the component is ready, rendering is a single CLI command (or programmatic call):&lt;br&gt;
&lt;/p&gt;

&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight shell"&gt;&lt;code&gt;npx remotion render VideoTemplate out/video.mp4
&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;






&lt;h2&gt;
  
  
  Step 4: Uploading to YouTube - YouTube Data API v3
&lt;/h2&gt;

&lt;p&gt;&lt;strong&gt;What it does:&lt;/strong&gt; Takes the rendered MP4 and automatically uploads it to the YouTube channel with a title, description, and the correct Shorts formatting - no human involvement.&lt;/p&gt;

&lt;p&gt;&lt;strong&gt;How the YouTube Data API works:&lt;/strong&gt; Google provides an official API for interacting with YouTube programmatically. After a one-time OAuth2 authentication setup (where you grant your app permission to upload to your channel), you can upload videos, set metadata, manage playlists, and more - all from code.&lt;/p&gt;

&lt;p&gt;&lt;strong&gt;The upload flow:&lt;/strong&gt;&lt;br&gt;
&lt;/p&gt;

&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight javascript"&gt;&lt;code&gt;&lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;youtube&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="nx"&gt;google&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;youtube&lt;/span&gt;&lt;span class="p"&gt;({&lt;/span&gt; &lt;span class="na"&gt;version&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="s1"&gt;v3&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="na"&gt;auth&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="nx"&gt;oauth2Client&lt;/span&gt; &lt;span class="p"&gt;});&lt;/span&gt;

&lt;span class="k"&gt;await&lt;/span&gt; &lt;span class="nx"&gt;youtube&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;videos&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;insert&lt;/span&gt;&lt;span class="p"&gt;({&lt;/span&gt;
  &lt;span class="na"&gt;part&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="p"&gt;[&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="s1"&gt;snippet&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="s1"&gt;status&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="p"&gt;],&lt;/span&gt;
  &lt;span class="na"&gt;requestBody&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
    &lt;span class="na"&gt;snippet&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
      &lt;span class="na"&gt;title&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="s2"&gt;`Year Progress Update - &lt;/span&gt;&lt;span class="p"&gt;${&lt;/span&gt;&lt;span class="nx"&gt;formattedDate&lt;/span&gt;&lt;span class="p"&gt;}&lt;/span&gt;&lt;span class="s2"&gt;`&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt;
      &lt;span class="na"&gt;description&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="s2"&gt;`&lt;/span&gt;&lt;span class="p"&gt;${&lt;/span&gt;&lt;span class="nx"&gt;percentage&lt;/span&gt;&lt;span class="p"&gt;}&lt;/span&gt;&lt;span class="s2"&gt;% of &lt;/span&gt;&lt;span class="p"&gt;${&lt;/span&gt;&lt;span class="nx"&gt;year&lt;/span&gt;&lt;span class="p"&gt;}&lt;/span&gt;&lt;span class="s2"&gt; has passed.\n\n&lt;/span&gt;&lt;span class="p"&gt;${&lt;/span&gt;&lt;span class="nx"&gt;historicalFact&lt;/span&gt;&lt;span class="p"&gt;}&lt;/span&gt;&lt;span class="s2"&gt;`&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt;
      &lt;span class="na"&gt;tags&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="p"&gt;[&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="s1"&gt;yearProgress&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="s1"&gt;motivation&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="s1"&gt;history&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="p"&gt;],&lt;/span&gt;
      &lt;span class="na"&gt;categoryId&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="s1"&gt;22&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt;
    &lt;span class="p"&gt;},&lt;/span&gt;
    &lt;span class="na"&gt;status&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
      &lt;span class="na"&gt;privacyStatus&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="s1"&gt;public&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt;
    &lt;span class="p"&gt;},&lt;/span&gt;
  &lt;span class="p"&gt;},&lt;/span&gt;
  &lt;span class="na"&gt;media&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
    &lt;span class="na"&gt;body&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="nx"&gt;fs&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;createReadStream&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="s1"&gt;out/video.mp4&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="p"&gt;),&lt;/span&gt;
  &lt;span class="p"&gt;},&lt;/span&gt;
&lt;span class="p"&gt;});&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;



&lt;p&gt;&lt;strong&gt;Making it a YouTube Short:&lt;/strong&gt; YouTube Shorts are simply vertical videos (9:16 aspect ratio) under 60 seconds. Remotion renders the video at 1080×1920, and that's all YouTube needs to classify it as a Short - no special API flag required.&lt;/p&gt;

&lt;p&gt;&lt;strong&gt;The token refresh problem:&lt;/strong&gt; OAuth2 tokens expire. To keep the automation running forever without manually re-authenticating, the app stores refresh tokens in &lt;code&gt;tokens.json&lt;/code&gt; and automatically refreshes the access token before each upload. This is the kind of detail that separates a weekend project from something that actually keeps running for months.&lt;/p&gt;




&lt;h2&gt;
  
  
  Step 5: The Bash Script - Gluing It All Together
&lt;/h2&gt;

&lt;p&gt;&lt;strong&gt;What it does:&lt;/strong&gt; &lt;code&gt;run-daily.sh&lt;/code&gt; is the conductor. It runs once a day and orchestrates the entire pipeline end-to-end.&lt;/p&gt;

&lt;p&gt;&lt;strong&gt;Why a bash script?&lt;/strong&gt; The core logic is in Node.js/TypeScript, but crontab (which triggers the daily run) works at the OS level. A bash script acts as the perfect bridge - it can set up the environment, invoke Node, handle errors, and maintain a log.&lt;/p&gt;

&lt;p&gt;&lt;strong&gt;What the script does, step by step:&lt;/strong&gt;&lt;br&gt;
&lt;/p&gt;

&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight shell"&gt;&lt;code&gt;&lt;span class="c"&gt;#!/bin/bash&lt;/span&gt;

&lt;span class="nv"&gt;PROJECT_DIR&lt;/span&gt;&lt;span class="o"&gt;=&lt;/span&gt;&lt;span class="s2"&gt;"/Users/mdshuvo/yearlyprogress"&lt;/span&gt;
&lt;span class="nv"&gt;STATE_FILE&lt;/span&gt;&lt;span class="o"&gt;=&lt;/span&gt;&lt;span class="s2"&gt;"&lt;/span&gt;&lt;span class="nv"&gt;$PROJECT_DIR&lt;/span&gt;&lt;span class="s2"&gt;/last-upload-date.txt"&lt;/span&gt;
&lt;span class="nv"&gt;LOG_FILE&lt;/span&gt;&lt;span class="o"&gt;=&lt;/span&gt;&lt;span class="s2"&gt;"&lt;/span&gt;&lt;span class="nv"&gt;$PROJECT_DIR&lt;/span&gt;&lt;span class="s2"&gt;/log.txt"&lt;/span&gt;

&lt;span class="nv"&gt;TODAY&lt;/span&gt;&lt;span class="o"&gt;=&lt;/span&gt;&lt;span class="si"&gt;$(&lt;/span&gt;&lt;span class="nb"&gt;date&lt;/span&gt; +%Y-%m-%d&lt;span class="si"&gt;)&lt;/span&gt;

&lt;span class="c"&gt;# Read the last run date&lt;/span&gt;
&lt;span class="k"&gt;if&lt;/span&gt; &lt;span class="o"&gt;[&lt;/span&gt; &lt;span class="nt"&gt;-f&lt;/span&gt; &lt;span class="s2"&gt;"&lt;/span&gt;&lt;span class="nv"&gt;$STATE_FILE&lt;/span&gt;&lt;span class="s2"&gt;"&lt;/span&gt; &lt;span class="o"&gt;]&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt; &lt;span class="k"&gt;then
  &lt;/span&gt;&lt;span class="nv"&gt;LAST_RUN&lt;/span&gt;&lt;span class="o"&gt;=&lt;/span&gt;&lt;span class="si"&gt;$(&lt;/span&gt;&lt;span class="nb"&gt;cat&lt;/span&gt; &lt;span class="s2"&gt;"&lt;/span&gt;&lt;span class="nv"&gt;$STATE_FILE&lt;/span&gt;&lt;span class="s2"&gt;"&lt;/span&gt;&lt;span class="si"&gt;)&lt;/span&gt;
&lt;span class="k"&gt;else
  &lt;/span&gt;&lt;span class="nv"&gt;LAST_RUN&lt;/span&gt;&lt;span class="o"&gt;=&lt;/span&gt;&lt;span class="s2"&gt;""&lt;/span&gt;
&lt;span class="k"&gt;fi&lt;/span&gt;

&lt;span class="c"&gt;# Skip if already ran today&lt;/span&gt;
&lt;span class="k"&gt;if&lt;/span&gt; &lt;span class="o"&gt;[&lt;/span&gt; &lt;span class="s2"&gt;"&lt;/span&gt;&lt;span class="nv"&gt;$LAST_RUN&lt;/span&gt;&lt;span class="s2"&gt;"&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="s2"&gt;"&lt;/span&gt;&lt;span class="nv"&gt;$TODAY&lt;/span&gt;&lt;span class="s2"&gt;"&lt;/span&gt; &lt;span class="o"&gt;]&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt; &lt;span class="k"&gt;then
  &lt;/span&gt;&lt;span class="nb"&gt;exit &lt;/span&gt;0
&lt;span class="k"&gt;fi

&lt;/span&gt;&lt;span class="nb"&gt;cd&lt;/span&gt; &lt;span class="s2"&gt;"&lt;/span&gt;&lt;span class="nv"&gt;$PROJECT_DIR&lt;/span&gt;&lt;span class="s2"&gt;"&lt;/span&gt; &lt;span class="o"&gt;||&lt;/span&gt; &lt;span class="nb"&gt;exit &lt;/span&gt;1

&lt;span class="c"&gt;# Run the main script, append output to log&lt;/span&gt;
/Users/mdshuvo/.nvm/versions/node/... &lt;span class="o"&gt;&amp;gt;&amp;gt;&lt;/span&gt; &lt;span class="s2"&gt;"&lt;/span&gt;&lt;span class="nv"&gt;$LOG_FILE&lt;/span&gt;&lt;span class="s2"&gt;"&lt;/span&gt; 2&amp;gt;&amp;amp;1

&lt;span class="c"&gt;# Trim the log to keep only the last 2000 lines&lt;/span&gt;
&lt;span class="k"&gt;if&lt;/span&gt; &lt;span class="o"&gt;[&lt;/span&gt; &lt;span class="nt"&gt;-f&lt;/span&gt; &lt;span class="s2"&gt;"&lt;/span&gt;&lt;span class="nv"&gt;$LOG_FILE&lt;/span&gt;&lt;span class="s2"&gt;"&lt;/span&gt; &lt;span class="o"&gt;]&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt; &lt;span class="k"&gt;then
  &lt;/span&gt;&lt;span class="nb"&gt;tail&lt;/span&gt; &lt;span class="nt"&gt;-n&lt;/span&gt; 2000 &lt;span class="s2"&gt;"&lt;/span&gt;&lt;span class="nv"&gt;$LOG_FILE&lt;/span&gt;&lt;span class="s2"&gt;"&lt;/span&gt; &lt;span class="o"&gt;&amp;gt;&lt;/span&gt; &lt;span class="s2"&gt;"&lt;/span&gt;&lt;span class="nv"&gt;$LOG_FILE&lt;/span&gt;&lt;span class="s2"&gt;.tmp"&lt;/span&gt; &lt;span class="o"&gt;&amp;amp;&amp;amp;&lt;/span&gt; &lt;span class="nb"&gt;mv&lt;/span&gt; &lt;span class="s2"&gt;"&lt;/span&gt;&lt;span class="nv"&gt;$LOG_FILE&lt;/span&gt;&lt;span class="s2"&gt;.tmp"&lt;/span&gt; &lt;span class="s2"&gt;"&lt;/span&gt;&lt;span class="nv"&gt;$LOG_FILE&lt;/span&gt;&lt;span class="s2"&gt;"&lt;/span&gt;
&lt;span class="k"&gt;fi&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;



&lt;p&gt;Key design decisions:&lt;/p&gt;

&lt;ul&gt;
&lt;li&gt;
&lt;strong&gt;Idempotency&lt;/strong&gt; - The state file check ensures the script never accidentally uploads twice on the same day, even if crontab triggers it multiple times.&lt;/li&gt;
&lt;li&gt;
&lt;strong&gt;Logging&lt;/strong&gt; - All output is appended to &lt;code&gt;log.txt&lt;/code&gt; for easy debugging if something goes wrong.&lt;/li&gt;
&lt;li&gt;
&lt;strong&gt;Log trimming&lt;/strong&gt; - The log is kept to 2,000 lines so it doesn't grow forever and fill up the disk.&lt;/li&gt;
&lt;li&gt;
&lt;strong&gt;nvm path&lt;/strong&gt; - The full path to the Node binary is specified, because crontab runs in a minimal environment that doesn't load your shell's &lt;code&gt;.bashrc&lt;/code&gt; or &lt;code&gt;.zshrc&lt;/code&gt;. This is a classic gotcha that trips up many automation projects.&lt;/li&gt;
&lt;/ul&gt;




&lt;h2&gt;
  
  
  Step 6: The Crontab - Set It and Forget It
&lt;/h2&gt;

&lt;p&gt;&lt;strong&gt;What it does:&lt;/strong&gt; Tells my computer(Mac mini) to run &lt;code&gt;run-daily.sh&lt;/code&gt; automatically at a set time every day.&lt;/p&gt;

&lt;p&gt;&lt;strong&gt;What is crontab?&lt;/strong&gt; It's a Unix job scheduler built into macOS and Linux. You define a schedule using a simple syntax, point it at a script, and the OS handles the rest - forever, or until you delete the entry.&lt;/p&gt;

&lt;p&gt;&lt;strong&gt;The crontab entry:&lt;/strong&gt;&lt;br&gt;
&lt;/p&gt;

&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight shell"&gt;&lt;code&gt;0 9 &lt;span class="k"&gt;*&lt;/span&gt; &lt;span class="k"&gt;*&lt;/span&gt; &lt;span class="k"&gt;*&lt;/span&gt; /Users/mdshuvo/yearlyprogress/run-daily.sh
&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;



&lt;p&gt;This runs the script at &lt;strong&gt;9:00 AM every day&lt;/strong&gt;. The five fields represent: minute, hour, day of month, month, day of week. Five stars with the first two set means "every day at 9:00."&lt;/p&gt;

&lt;p&gt;&lt;strong&gt;The result:&lt;/strong&gt; Every morning at 9 AM, without any human action, computer runs the script, generates the video, and uploads it to YouTube. By the time most people are having their morning coffee, the day's video is live.&lt;/p&gt;




&lt;h2&gt;
  
  
  What Makes This Project Special
&lt;/h2&gt;

&lt;p&gt;Beyond the individual pieces, what's interesting here is how each layer is chosen for a specific reason:&lt;/p&gt;

&lt;ul&gt;
&lt;li&gt;
&lt;strong&gt;JavaScript for logic&lt;/strong&gt; - Universal, fast to write, perfect for date manipulation and API calls.&lt;/li&gt;
&lt;li&gt;
&lt;strong&gt;Gemini for content&lt;/strong&gt; - Turns a static metric into a story worth watching.&lt;/li&gt;
&lt;li&gt;
&lt;strong&gt;Remotion for video&lt;/strong&gt; - Treats video like software, making it reproducible and automatable.&lt;/li&gt;
&lt;li&gt;
&lt;strong&gt;YouTube Data API for distribution&lt;/strong&gt; - The last mile, handled entirely in code.&lt;/li&gt;
&lt;li&gt;
&lt;strong&gt;Bash for orchestration&lt;/strong&gt; - Lightweight, reliable, and plays perfectly with crontab.&lt;/li&gt;
&lt;li&gt;
&lt;strong&gt;crontab for scheduling&lt;/strong&gt; - The simplest possible scheduler, built into the OS.&lt;/li&gt;
&lt;/ul&gt;

&lt;p&gt;No overengineering. No cloud infrastructure to manage. No monthly bills for a complex pipeline. Just a small computer, some clever code, and a crontab entry.&lt;/p&gt;




&lt;h2&gt;
  
  
  What's Next?
&lt;/h2&gt;

&lt;p&gt;A few directions this project could grow:&lt;/p&gt;

&lt;ul&gt;
&lt;li&gt;
&lt;strong&gt;Multiple languages&lt;/strong&gt; - Generate the same video in Bengali, Spanish, French, etc. to reach broader audiences.&lt;/li&gt;
&lt;li&gt;
&lt;strong&gt;Milestone alerts&lt;/strong&gt; - Special videos at 25%, 50%, 75%, and 99% with more elaborate animations.&lt;/li&gt;
&lt;li&gt;
&lt;strong&gt;Thumbnail generation&lt;/strong&gt; - Use a canvas library or Puppeteer to auto-generate custom thumbnails.&lt;/li&gt;
&lt;li&gt;
&lt;strong&gt;Analytics tracking&lt;/strong&gt; - Pull view counts back from the YouTube API and log the growth over time.&lt;/li&gt;
&lt;li&gt;
&lt;strong&gt;Multi-channel&lt;/strong&gt; - Clone the pipeline for a "Day of the Year" or "Days Until New Year" variant.&lt;/li&gt;
&lt;/ul&gt;




&lt;h2&gt;
  
  
  Try It Yourself
&lt;/h2&gt;

&lt;p&gt;All the core tools used are free or have generous free tiers:&lt;/p&gt;

&lt;ul&gt;
&lt;li&gt;
&lt;a href="https://remotion.dev" rel="noopener noreferrer"&gt;Remotion&lt;/a&gt; - Free for open-source and personal projects&lt;/li&gt;
&lt;li&gt;
&lt;a href="https://ai.google.dev" rel="noopener noreferrer"&gt;Google Gemini API&lt;/a&gt; - Free tier available&lt;/li&gt;
&lt;li&gt;
&lt;a href="https://developers.google.com/youtube/v3" rel="noopener noreferrer"&gt;YouTube Data API v3&lt;/a&gt; - Free with a Google account&lt;/li&gt;
&lt;/ul&gt;

&lt;p&gt;If you want to watch the year tick away one percentage point at a time, the channel is live at &lt;strong&gt;&lt;a href="https://www.youtube.com/@ProgressOfYear" rel="noopener noreferrer"&gt;youtube.com/@ProgressOfYear&lt;/a&gt;&lt;/strong&gt;. A new video drops every morning.&lt;/p&gt;

&lt;p&gt;&lt;em&gt;Built with JavaScript, Remotion, Gemini&lt;/em&gt;&lt;/p&gt;

</description>
      <category>coding</category>
      <category>programming</category>
      <category>automation</category>
      <category>ai</category>
    </item>
    <item>
      <title>Why Traditional Tutorials Don't Work for Learning Git</title>
      <dc:creator>Shuvo</dc:creator>
      <pubDate>Wed, 13 May 2026 04:57:00 +0000</pubDate>
      <link>https://dev.to/0shuvo0/why-traditional-tutorials-dont-work-for-learning-git-36j3</link>
      <guid>https://dev.to/0shuvo0/why-traditional-tutorials-dont-work-for-learning-git-36j3</guid>
      <description>&lt;p&gt;If you've tried learning Git through videos or articles and still feel confused, you're not alone. The problem isn't you - it's the way Git is usually taught.&lt;/p&gt;

&lt;h2&gt;
  
  
  &lt;a href="https://www.gitmission.com/" rel="noopener noreferrer"&gt;&lt;img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fln6va7gb9hatyiij747b.png" alt="GitMission CTA" width="219" height="47"&gt;&lt;/a&gt;
&lt;/h2&gt;

&lt;h2&gt;
  
  
  The Problem with Traditional Git Tutorials
&lt;/h2&gt;

&lt;p&gt;Most tutorials focus on explaining commands instead of helping you understand how Git actually works in real situations.&lt;/p&gt;

&lt;ul&gt;
&lt;li&gt;They are passive (watching instead of doing)&lt;/li&gt;
&lt;li&gt;They focus on syntax, not workflows&lt;/li&gt;
&lt;li&gt;No real problem-solving scenarios&lt;/li&gt;
&lt;li&gt;No feedback when you make mistakes&lt;/li&gt;
&lt;/ul&gt;




&lt;h2&gt;
  
  
  Why This Approach Fails
&lt;/h2&gt;

&lt;h3&gt;
  
  
  1. Git is Conceptual, Not Just Commands
&lt;/h3&gt;

&lt;p&gt;Git involves understanding history, branches, and changes - not just memorizing commands.&lt;/p&gt;

&lt;h3&gt;
  
  
  2. No Muscle Memory
&lt;/h3&gt;

&lt;p&gt;Watching tutorials doesn't build the habit of actually using Git commands.&lt;/p&gt;

&lt;h3&gt;
  
  
  3. No Real Context
&lt;/h3&gt;

&lt;p&gt;Real development involves conflicts, mistakes, and workflows - tutorials rarely simulate this.&lt;/p&gt;




&lt;h2&gt;
  
  
  Traditional Learning vs Effective Learning
&lt;/h2&gt;

&lt;div class="table-wrapper-paragraph"&gt;&lt;table&gt;
&lt;thead&gt;
&lt;tr&gt;
&lt;th&gt;Method&lt;/th&gt;
&lt;th&gt;Result&lt;/th&gt;
&lt;/tr&gt;
&lt;/thead&gt;
&lt;tbody&gt;
&lt;tr&gt;
&lt;td&gt;Watching tutorials&lt;/td&gt;
&lt;td&gt;Temporary understanding&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td&gt;Reading docs&lt;/td&gt;
&lt;td&gt;Good reference, low retention&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td&gt;&lt;strong&gt;Interactive practice&lt;/strong&gt;&lt;/td&gt;
&lt;td&gt;&lt;strong&gt;Real understanding&lt;/strong&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;/tbody&gt;
&lt;/table&gt;&lt;/div&gt;




&lt;h2&gt;
  
  
  A Better Way to Learn Git
&lt;/h2&gt;

&lt;p&gt;The most effective way to learn Git is through &lt;strong&gt;hands-on, interactive practice&lt;/strong&gt;.&lt;/p&gt;

&lt;ol&gt;
&lt;li&gt;Learn a concept&lt;/li&gt;
&lt;li&gt;Apply it immediately&lt;/li&gt;
&lt;li&gt;Make mistakes and fix them&lt;/li&gt;
&lt;li&gt;Repeat with real workflows&lt;/li&gt;
&lt;/ol&gt;




&lt;h2&gt;
  
  
  Stop Watching, Start Practicing
&lt;/h2&gt;

&lt;p&gt;If you want to truly understand Git, you need to use it - not just watch someone else use it.&lt;br&gt;
&lt;a href="https://www.gitmission.com/" rel="noopener noreferrer"&gt;&lt;img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fln6va7gb9hatyiij747b.png" alt="GitMission CTA" width="219" height="47"&gt;&lt;/a&gt;&lt;/p&gt;




&lt;h2&gt;
  
  
  Frequently Asked Questions
&lt;/h2&gt;

&lt;p&gt;&lt;strong&gt;Are tutorials useless for learning Git?&lt;/strong&gt;&lt;br&gt;
Not useless, but incomplete. They should be combined with hands-on practice.&lt;/p&gt;

&lt;p&gt;&lt;strong&gt;Why does Git feel confusing?&lt;/strong&gt;&lt;br&gt;
Because it involves abstract concepts that require practice to fully understand.&lt;/p&gt;

&lt;p&gt;&lt;strong&gt;What is the best way to learn Git?&lt;/strong&gt;&lt;br&gt;
The best way is practicing real workflows instead of relying only on passive learning.&lt;/p&gt;

</description>
      <category>git</category>
      <category>github</category>
      <category>coding</category>
      <category>programming</category>
    </item>
    <item>
      <title>Learn Git Basics in 5 Minutes (Quick Guide)</title>
      <dc:creator>Shuvo</dc:creator>
      <pubDate>Wed, 13 May 2026 04:53:45 +0000</pubDate>
      <link>https://dev.to/0shuvo0/learn-git-basics-in-5-minutes-quick-guide-1e8b</link>
      <guid>https://dev.to/0shuvo0/learn-git-basics-in-5-minutes-quick-guide-1e8b</guid>
      <description>&lt;p&gt;Want to learn Git fast? This 5-minute guide covers the essential Git concepts and commands you need to get started. No fluff - just the basics that actually matter.&lt;/p&gt;

&lt;h2&gt;
  
  
  &lt;a href="https://www.gitmission.com/" rel="noopener noreferrer"&gt;&lt;img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fln6va7gb9hatyiij747b.png" alt="GitMission CTA" width="219" height="47"&gt;&lt;/a&gt;
&lt;/h2&gt;

&lt;h2&gt;
  
  
  What is Git?
&lt;/h2&gt;

&lt;p&gt;Git is a version control system that helps you track changes in your code, collaborate with others, and manage different versions of your project.&lt;/p&gt;




&lt;h2&gt;
  
  
  3 Core Git Concepts
&lt;/h2&gt;

&lt;h3&gt;
  
  
  Repository (Repo)
&lt;/h3&gt;

&lt;p&gt;A project folder tracked by Git.&lt;/p&gt;

&lt;h3&gt;
  
  
  Commit
&lt;/h3&gt;

&lt;p&gt;A snapshot of your changes.&lt;/p&gt;

&lt;h3&gt;
  
  
  Branch
&lt;/h3&gt;

&lt;p&gt;A separate line of development.&lt;/p&gt;




&lt;h2&gt;
  
  
  Essential Git Commands
&lt;/h2&gt;

&lt;div class="table-wrapper-paragraph"&gt;&lt;table&gt;
&lt;thead&gt;
&lt;tr&gt;
&lt;th&gt;Command&lt;/th&gt;
&lt;th&gt;Description&lt;/th&gt;
&lt;/tr&gt;
&lt;/thead&gt;
&lt;tbody&gt;
&lt;tr&gt;
&lt;td&gt;&lt;code&gt;git init&lt;/code&gt;&lt;/td&gt;
&lt;td&gt;Initialize a new repository&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td&gt;&lt;code&gt;git add .&lt;/code&gt;&lt;/td&gt;
&lt;td&gt;Stage changes&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td&gt;&lt;code&gt;git commit -m "message"&lt;/code&gt;&lt;/td&gt;
&lt;td&gt;Save changes&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td&gt;&lt;code&gt;git status&lt;/code&gt;&lt;/td&gt;
&lt;td&gt;Check current state&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td&gt;&lt;code&gt;git branch&lt;/code&gt;&lt;/td&gt;
&lt;td&gt;View branches&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td&gt;&lt;code&gt;git checkout -b feature&lt;/code&gt;&lt;/td&gt;
&lt;td&gt;Create and switch branch&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td&gt;&lt;code&gt;git merge&lt;/code&gt;&lt;/td&gt;
&lt;td&gt;Merge branches&lt;/td&gt;
&lt;/tr&gt;
&lt;/tbody&gt;
&lt;/table&gt;&lt;/div&gt;




&lt;h2&gt;
  
  
  Basic Git Workflow
&lt;/h2&gt;

&lt;ol&gt;
&lt;li&gt;Make changes to your files&lt;/li&gt;
&lt;li&gt;Run &lt;code&gt;git add .&lt;/code&gt;
&lt;/li&gt;
&lt;li&gt;Run &lt;code&gt;git commit -m "message"&lt;/code&gt;
&lt;/li&gt;
&lt;li&gt;Repeat as you build your project&lt;/li&gt;
&lt;/ol&gt;




&lt;h2&gt;
  
  
  Important: Reading Isn't Enough
&lt;/h2&gt;

&lt;p&gt;You can't learn Git just by reading. You need to actually use the commands in real scenarios.&lt;/p&gt;

&lt;p&gt;The fastest way to learn Git:&lt;/p&gt;

&lt;ul&gt;
&lt;li&gt;Learn a concept&lt;/li&gt;
&lt;li&gt;Practice it immediately&lt;/li&gt;
&lt;li&gt;Repeat with real workflows&lt;/li&gt;
&lt;/ul&gt;




&lt;h2&gt;
  
  
  Practice Git in Minutes
&lt;/h2&gt;

&lt;p&gt;Instead of just reading, start practicing Git commands interactively and build real confidence.&lt;/p&gt;

&lt;h2&gt;
  
  
  &lt;a href="https://www.gitmission.com/" rel="noopener noreferrer"&gt;&lt;img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fln6va7gb9hatyiij747b.png" alt="GitMission CTA" width="219" height="47"&gt;&lt;/a&gt;
&lt;/h2&gt;

&lt;h2&gt;
  
  
  Frequently Asked Questions
&lt;/h2&gt;

&lt;p&gt;&lt;strong&gt;Can I learn Git in 5 minutes?&lt;/strong&gt;&lt;br&gt;
You can understand the basics in 5 minutes, but mastering Git requires practice.&lt;/p&gt;

&lt;p&gt;&lt;strong&gt;What should I learn first in Git?&lt;/strong&gt;&lt;br&gt;
Start with repositories, commits, and basic commands like add and commit.&lt;/p&gt;

&lt;p&gt;&lt;strong&gt;Is Git hard for beginners?&lt;/strong&gt;&lt;br&gt;
It can feel confusing at first, but becomes easy with hands-on practice.&lt;/p&gt;

</description>
      <category>git</category>
      <category>github</category>
      <category>coding</category>
      <category>programming</category>
    </item>
    <item>
      <title>Git Commands Senior Developers Actually Use</title>
      <dc:creator>Shuvo</dc:creator>
      <pubDate>Wed, 13 May 2026 04:48:34 +0000</pubDate>
      <link>https://dev.to/0shuvo0/git-commands-senior-developers-actually-use-4dck</link>
      <guid>https://dev.to/0shuvo0/git-commands-senior-developers-actually-use-4dck</guid>
      <description>&lt;p&gt;Want to use Git like a senior developer? It’s not about knowing hundreds of commands - it’s about mastering a small set of powerful ones and using them confidently in real workflows.&lt;br&gt;
&lt;a href="https://www.gitmission.com/" rel="noopener noreferrer"&gt;&lt;img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fln6va7gb9hatyiij747b.png" alt="GitMission CTA" width="219" height="47"&gt;&lt;/a&gt;&lt;/p&gt;

&lt;h4&gt;
  
  
  What Makes These Commands “Senior-Level”?
&lt;/h4&gt;

&lt;p&gt;Senior developers don’t just run commands - they understand how Git history works, how to fix mistakes, and how to manage clean workflows. These commands reflect that mindset.&lt;/p&gt;

&lt;h3&gt;
  
  
  1. &lt;code&gt;git status&lt;/code&gt;
&lt;/h3&gt;

&lt;blockquote&gt;
&lt;p&gt;Always Know What’s Happening&lt;/p&gt;
&lt;/blockquote&gt;

&lt;p&gt;Check your current state before doing anything. Senior devs constantly use this.&lt;/p&gt;

&lt;h3&gt;
  
  
  2. &lt;code&gt;git log --oneline --graph --decorate&lt;/code&gt;
&lt;/h3&gt;

&lt;blockquote&gt;
&lt;p&gt;Visualize History&lt;/p&gt;
&lt;/blockquote&gt;

&lt;p&gt;See your commit history in a clean, readable format.&lt;/p&gt;

&lt;h3&gt;
  
  
  3. &lt;code&gt;git checkout -b feature-name&lt;/code&gt;
&lt;/h3&gt;

&lt;blockquote&gt;
&lt;p&gt;Work in Branches&lt;/p&gt;
&lt;/blockquote&gt;

&lt;p&gt;Create isolated environments for features and fixes.&lt;/p&gt;

&lt;h3&gt;
  
  
  4. &lt;code&gt;git merge&lt;/code&gt;
&lt;/h3&gt;

&lt;blockquote&gt;
&lt;p&gt;Combine Work Safely&lt;/p&gt;
&lt;/blockquote&gt;

&lt;p&gt;Merge branches when features are complete.&lt;/p&gt;

&lt;h3&gt;
  
  
  5. &lt;code&gt;git rebase&lt;/code&gt;
&lt;/h3&gt;

&lt;blockquote&gt;
&lt;p&gt;Clean Up History&lt;/p&gt;
&lt;/blockquote&gt;

&lt;p&gt;Rewrite commit history to keep it linear and clean.&lt;/p&gt;

&lt;h3&gt;
  
  
  6. &lt;code&gt;git stash&lt;/code&gt;
&lt;/h3&gt;

&lt;blockquote&gt;
&lt;p&gt;Save Work Temporarily&lt;/p&gt;
&lt;/blockquote&gt;

&lt;p&gt;Quickly store changes without committing.&lt;/p&gt;

&lt;h3&gt;
  
  
  7. &lt;code&gt;git reset&lt;/code&gt;
&lt;/h3&gt;

&lt;blockquote&gt;
&lt;p&gt;Undo Changes&lt;/p&gt;
&lt;/blockquote&gt;

&lt;p&gt;Move back to a previous state when needed.&lt;/p&gt;

&lt;h3&gt;
  
  
  8. &lt;code&gt;git restore&lt;/code&gt;
&lt;/h3&gt;

&lt;blockquote&gt;
&lt;p&gt;Fix Mistakes Safely&lt;/p&gt;
&lt;/blockquote&gt;

&lt;p&gt;Restore files without affecting commits.&lt;/p&gt;

&lt;h3&gt;
  
  
  9. &lt;code&gt;git pull --rebase&lt;/code&gt;
&lt;/h3&gt;

&lt;blockquote&gt;
&lt;p&gt;Avoid Messy Merges&lt;/p&gt;
&lt;/blockquote&gt;

&lt;p&gt;Keep history clean when pulling updates.&lt;/p&gt;

&lt;h3&gt;
  
  
  10. &lt;code&gt;git diff&lt;/code&gt;
&lt;/h3&gt;

&lt;blockquote&gt;
&lt;p&gt;See What Changed&lt;/p&gt;
&lt;/blockquote&gt;

&lt;p&gt;Understand exactly what modifications were made.&lt;/p&gt;

&lt;h2&gt;
  
  
  Practice These Commands Like a Pro
&lt;/h2&gt;

&lt;p&gt;Reading commands isn’t enough - you need to actually use them in real workflows.&lt;br&gt;
&lt;a href="https://www.gitmission.com/" rel="noopener noreferrer"&gt;&lt;img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fln6va7gb9hatyiij747b.png" alt="GitMission CTA" width="219" height="47"&gt;&lt;/a&gt;&lt;/p&gt;

</description>
      <category>git</category>
      <category>github</category>
      <category>coding</category>
      <category>programming</category>
    </item>
    <item>
      <title>10 Git Mistakes Beginners Make (And How to Avoid Them)</title>
      <dc:creator>Shuvo</dc:creator>
      <pubDate>Wed, 13 May 2026 04:40:12 +0000</pubDate>
      <link>https://dev.to/0shuvo0/10-git-mistakes-beginners-make-and-how-to-avoid-them-1e44</link>
      <guid>https://dev.to/0shuvo0/10-git-mistakes-beginners-make-and-how-to-avoid-them-1e44</guid>
      <description>&lt;h2&gt;
  
  
  Why Beginners Struggle with Git
&lt;/h2&gt;

&lt;p&gt;Git isn’t just about commands - it’s about understanding how changes, history, and branches work together. Without hands-on practice, these concepts feel confusing.&lt;/p&gt;

&lt;p&gt;&lt;a href="https://www.gitmission.com/" rel="noopener noreferrer"&gt;&lt;img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fln6va7gb9hatyiij747b.png" alt="GitMission CTA" width="219" height="47"&gt;&lt;/a&gt;&lt;/p&gt;

&lt;h3&gt;
  
  
  10 Common Git Mistakes
&lt;/h3&gt;

&lt;h4&gt;
  
  
  1. Trying to Memorize Commands
&lt;/h4&gt;

&lt;p&gt;Many beginners try to memorize Git commands instead of understanding what they actually do.&lt;br&gt;
&lt;strong&gt;How to fix&lt;/strong&gt;: Focus on workflows, not commands. Practice using Git in real scenarios.&lt;/p&gt;

&lt;h4&gt;
  
  
  2. Not Practicing Enough
&lt;/h4&gt;

&lt;p&gt;Watching tutorials without actually using Git leads to shallow understanding.&lt;br&gt;
&lt;strong&gt;How to fix&lt;/strong&gt;: Use interactive practice to apply what you learn immediately. &lt;a href="https://www.gitmission.com/" rel="noopener noreferrer"&gt;GitMission&lt;/a&gt; is great for that.&lt;/p&gt;

&lt;h4&gt;
  
  
  3. Ignoring Branching
&lt;/h4&gt;

&lt;p&gt;Branching is a core concept, but many beginners avoid it.&lt;br&gt;
&lt;strong&gt;How to fix&lt;/strong&gt;: Practice creating, switching, and merging branches regularly.&lt;/p&gt;

&lt;h4&gt;
  
  
  4. Fear of Breaking Things
&lt;/h4&gt;

&lt;p&gt;Beginners often hesitate because they’re afraid of making mistakes.&lt;br&gt;
&lt;strong&gt;How to fix&lt;/strong&gt;: Git is designed to recover changes - experiment freely.&lt;/p&gt;

&lt;h4&gt;
  
  
  5. Not Understanding Commits
&lt;/h4&gt;

&lt;p&gt;Treating commits like random saves instead of meaningful checkpoints.&lt;br&gt;
&lt;strong&gt;How to fix&lt;/strong&gt;: Make small, descriptive commits that reflect logical changes.&lt;/p&gt;

&lt;h4&gt;
  
  
  6. Skipping Git Fundamentals
&lt;/h4&gt;

&lt;p&gt;Jumping into advanced topics without understanding basics.&lt;br&gt;
&lt;strong&gt;How to fix&lt;/strong&gt;: Master repositories, commits, and staging first.&lt;/p&gt;

&lt;h4&gt;
  
  
  7. Confusion Between Git and GitHub
&lt;/h4&gt;

&lt;p&gt;Many beginners mix up Git (tool) and GitHub (platform).&lt;br&gt;
&lt;strong&gt;How to fix&lt;/strong&gt;: Understand Git as the system, GitHub as a hosting service.&lt;/p&gt;

&lt;h4&gt;
  
  
  8. Poor Commit Messages
&lt;/h4&gt;

&lt;p&gt;Using vague messages like 'update' or 'fix'.&lt;br&gt;
&lt;strong&gt;How to fix&lt;/strong&gt;: Write clear messages describing what changed and why.&lt;/p&gt;

&lt;h4&gt;
  
  
  9. Not Learning How to Undo Changes
&lt;/h4&gt;

&lt;p&gt;Beginners panic when something goes wrong.&lt;br&gt;
&lt;strong&gt;How to fix&lt;/strong&gt;: Learn commands for undoing commits, restoring files, and fixing mistakes.&lt;/p&gt;

&lt;h4&gt;
  
  
  10. Avoiding Real Workflows
&lt;/h4&gt;

&lt;p&gt;Only learning isolated commands instead of real use cases.&lt;br&gt;
&lt;strong&gt;How to fix&lt;/strong&gt;: Practice full workflows like feature development and merging.&lt;/p&gt;

&lt;h3&gt;
  
  
  The Real Secret to Learning Git
&lt;/h3&gt;

&lt;p&gt;The biggest mistake is relying only on passive learning.&lt;/p&gt;

&lt;ul&gt;
&lt;li&gt;Learn a concept&lt;/li&gt;
&lt;li&gt;Practice it immediately&lt;/li&gt;
&lt;li&gt;Repeat with real scenarios&lt;/li&gt;
&lt;/ul&gt;

&lt;h3&gt;
  
  
  Learn Git Without These Mistakes
&lt;/h3&gt;

&lt;p&gt;Instead of struggling through trial and error, you can learn Git the right way through structured, hands-on practice.&lt;br&gt;
&lt;a href="https://www.gitmission.com/" rel="noopener noreferrer"&gt;&lt;img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fln6va7gb9hatyiij747b.png" alt="GitMission CTA" width="219" height="47"&gt;&lt;/a&gt;&lt;/p&gt;

</description>
      <category>git</category>
      <category>github</category>
      <category>coding</category>
      <category>programming</category>
    </item>
    <item>
      <title>Functional tabs with only CSS (No JavaScript)</title>
      <dc:creator>Shuvo</dc:creator>
      <pubDate>Wed, 04 Jun 2025 01:34:42 +0000</pubDate>
      <link>https://dev.to/0shuvo0/functional-tabs-with-only-css-no-javascript-29ok</link>
      <guid>https://dev.to/0shuvo0/functional-tabs-with-only-css-no-javascript-29ok</guid>
      <description>&lt;p&gt;This article demonstrates how to create functional tabs using only CSS, without any JavaScript. The tabs will allow users to switch between different content sections seamlessly, showcasing the power of CSS for interactive elements. &lt;br&gt;
Original article: &lt;a href="https://www.wtfcodes.com/wtf-articles/read/Functional-tabs-with-only-CSSS-No-JavaScript" rel="noopener noreferrer"&gt;wtfcodes.com&lt;/a&gt;&lt;/p&gt;
&lt;h3&gt;
  
  
  Basic setup:
&lt;/h3&gt;

&lt;p&gt;To get started, we will create a typical HTML structure for our tabs and apply some basic styles to make them visually appealing.&lt;br&gt;
&lt;/p&gt;

&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight html"&gt;&lt;code&gt;&lt;span class="nt"&gt;&amp;lt;div&lt;/span&gt; &lt;span class="na"&gt;class=&lt;/span&gt;&lt;span class="s"&gt;"tabs-wrapper"&lt;/span&gt;&lt;span class="nt"&gt;&amp;gt;&lt;/span&gt;  
  &lt;span class="nt"&gt;&amp;lt;nav&lt;/span&gt; &lt;span class="na"&gt;class=&lt;/span&gt;&lt;span class="s"&gt;"tabs-nav"&lt;/span&gt;&lt;span class="nt"&gt;&amp;gt;&lt;/span&gt;
    &lt;span class="nt"&gt;&amp;lt;div&lt;/span&gt; &lt;span class="na"&gt;class=&lt;/span&gt;&lt;span class="s"&gt;"tab-item"&lt;/span&gt;&lt;span class="nt"&gt;&amp;gt;&lt;/span&gt;
      &lt;span class="nt"&gt;&amp;lt;span&amp;gt;&lt;/span&gt;Tab A&lt;span class="nt"&gt;&amp;lt;/span&amp;gt;&lt;/span&gt;
    &lt;span class="nt"&gt;&amp;lt;/div&amp;gt;&lt;/span&gt;
    &lt;span class="nt"&gt;&amp;lt;div&lt;/span&gt; &lt;span class="na"&gt;class=&lt;/span&gt;&lt;span class="s"&gt;"tab-item"&lt;/span&gt;&lt;span class="nt"&gt;&amp;gt;&lt;/span&gt;
      &lt;span class="nt"&gt;&amp;lt;span&amp;gt;&lt;/span&gt;Tab B&lt;span class="nt"&gt;&amp;lt;/span&amp;gt;&lt;/span&gt;
    &lt;span class="nt"&gt;&amp;lt;/div&amp;gt;&lt;/span&gt;
    &lt;span class="nt"&gt;&amp;lt;div&lt;/span&gt; &lt;span class="na"&gt;class=&lt;/span&gt;&lt;span class="s"&gt;"tab-item"&lt;/span&gt;&lt;span class="nt"&gt;&amp;gt;&lt;/span&gt;
      &lt;span class="nt"&gt;&amp;lt;span&amp;gt;&lt;/span&gt;Tab C&lt;span class="nt"&gt;&amp;lt;/span&amp;gt;&lt;/span&gt;
    &lt;span class="nt"&gt;&amp;lt;/div&amp;gt;&lt;/span&gt;

  &lt;span class="nt"&gt;&amp;lt;/nav&amp;gt;&lt;/span&gt;

  &lt;span class="nt"&gt;&amp;lt;div&lt;/span&gt; &lt;span class="na"&gt;class=&lt;/span&gt;&lt;span class="s"&gt;"tab-content"&lt;/span&gt; &lt;span class="na"&gt;id=&lt;/span&gt;&lt;span class="s"&gt;"tab-a-content"&lt;/span&gt;&lt;span class="nt"&gt;&amp;gt;&lt;/span&gt;
    I am Tab A content
  &lt;span class="nt"&gt;&amp;lt;/div&amp;gt;&lt;/span&gt;
  &lt;span class="nt"&gt;&amp;lt;div&lt;/span&gt; &lt;span class="na"&gt;class=&lt;/span&gt;&lt;span class="s"&gt;"tab-content"&lt;/span&gt; &lt;span class="na"&gt;id=&lt;/span&gt;&lt;span class="s"&gt;"tab-b-content"&lt;/span&gt;&lt;span class="nt"&gt;&amp;gt;&lt;/span&gt;
    I am Tab B content
  &lt;span class="nt"&gt;&amp;lt;/div&amp;gt;&lt;/span&gt;
  &lt;span class="nt"&gt;&amp;lt;div&lt;/span&gt; &lt;span class="na"&gt;class=&lt;/span&gt;&lt;span class="s"&gt;"tab-content"&lt;/span&gt; &lt;span class="na"&gt;id=&lt;/span&gt;&lt;span class="s"&gt;"tab-c-content"&lt;/span&gt;&lt;span class="nt"&gt;&amp;gt;&lt;/span&gt;
    I am Tab C content
  &lt;span class="nt"&gt;&amp;lt;/div&amp;gt;&lt;/span&gt;
&lt;span class="nt"&gt;&amp;lt;/div&amp;gt;&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;





&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight css"&gt;&lt;code&gt;&lt;span class="nt"&gt;body&lt;/span&gt;&lt;span class="p"&gt;{&lt;/span&gt;
  &lt;span class="nl"&gt;font-family&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="n"&gt;Arial&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
  &lt;span class="nl"&gt;padding&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="m"&gt;1em&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;

&lt;span class="nc"&gt;.tabs-nav&lt;/span&gt;&lt;span class="p"&gt;{&lt;/span&gt;
  &lt;span class="nl"&gt;display&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="n"&gt;flex&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
  &lt;span class="py"&gt;gap&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="m"&gt;8px&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
  &lt;span class="nl"&gt;margin-bottom&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="m"&gt;16px&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
  &lt;span class="py"&gt;user-select&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="nb"&gt;none&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;

&lt;span class="nc"&gt;.tab-item&lt;/span&gt;&lt;span class="p"&gt;{&lt;/span&gt;
  &lt;span class="nl"&gt;background&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="m"&gt;#bcbcbc&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
  &lt;span class="nl"&gt;padding&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="m"&gt;6px&lt;/span&gt; &lt;span class="m"&gt;12px&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
  &lt;span class="nl"&gt;border-radius&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="m"&gt;6px&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
  &lt;span class="nl"&gt;color&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="m"&gt;#fff&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
  &lt;span class="nl"&gt;cursor&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="nb"&gt;pointer&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;
&lt;span class="nc"&gt;.tab-content&lt;/span&gt;&lt;span class="p"&gt;{&lt;/span&gt;
  &lt;span class="nl"&gt;padding&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="m"&gt;12px&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
  &lt;span class="nl"&gt;border-radius&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="m"&gt;16px&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
  &lt;span class="nl"&gt;border&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="m"&gt;1px&lt;/span&gt; &lt;span class="nb"&gt;solid&lt;/span&gt; &lt;span class="n"&gt;grey&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;



&lt;p&gt;&lt;a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fdwt6ft7j92j7o787poou.png" class="article-body-image-wrapper"&gt;&lt;img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fdwt6ft7j92j7o787poou.png" alt="Basic setup result" width="507" height="219"&gt;&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;Great! Now we need somekind of interactivity.&lt;br&gt;
Lets think what cab we do so the active tab has something different than other tabs.&lt;br&gt;
Well we can use &lt;code&gt;&amp;lt;input type="radio" /&amp;gt;&lt;/code&gt; to indicate the active tab. Since radio inputs allow only one to be selected at a time, we can use them to control which tab is active.&lt;br&gt;
And to make sure we can toggle the radio inputs by clicking on the tab, we can use the &lt;code&gt;&amp;lt;label&amp;gt;&lt;/code&gt; element instead of &lt;code&gt;&amp;lt;div&amp;gt;&lt;/code&gt; for the tab items.&lt;br&gt;
So the updated HTML structure will look like this:&lt;br&gt;
&lt;/p&gt;

&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight html"&gt;&lt;code&gt;&lt;span class="nt"&gt;&amp;lt;div&lt;/span&gt; &lt;span class="na"&gt;class=&lt;/span&gt;&lt;span class="s"&gt;"tabs-wrapper"&lt;/span&gt;&lt;span class="nt"&gt;&amp;gt;&lt;/span&gt;  
  &lt;span class="nt"&gt;&amp;lt;nav&lt;/span&gt; &lt;span class="na"&gt;class=&lt;/span&gt;&lt;span class="s"&gt;"tabs-nav"&lt;/span&gt;&lt;span class="nt"&gt;&amp;gt;&lt;/span&gt;
    &lt;span class="nt"&gt;&amp;lt;label&lt;/span&gt; &lt;span class="na"&gt;for=&lt;/span&gt;&lt;span class="s"&gt;"tab-a-toggle"&lt;/span&gt; &lt;span class="na"&gt;class=&lt;/span&gt;&lt;span class="s"&gt;"tab-item"&lt;/span&gt;&lt;span class="nt"&gt;&amp;gt;&lt;/span&gt;
      &lt;span class="nt"&gt;&amp;lt;span&amp;gt;&lt;/span&gt;Tab A&lt;span class="nt"&gt;&amp;lt;/span&amp;gt;&lt;/span&gt;
      &lt;span class="nt"&gt;&amp;lt;input&lt;/span&gt; &lt;span class="na"&gt;checked&lt;/span&gt; &lt;span class="na"&gt;name=&lt;/span&gt;&lt;span class="s"&gt;"tabs-toggle"&lt;/span&gt; &lt;span class="na"&gt;id=&lt;/span&gt;&lt;span class="s"&gt;"tab-a-toggle"&lt;/span&gt; &lt;span class="na"&gt;type=&lt;/span&gt;&lt;span class="s"&gt;"radio"&lt;/span&gt;&lt;span class="nt"&gt;&amp;gt;&lt;/span&gt;
    &lt;span class="nt"&gt;&amp;lt;/label&amp;gt;&lt;/span&gt;
    &lt;span class="nt"&gt;&amp;lt;label&lt;/span&gt; &lt;span class="na"&gt;for=&lt;/span&gt;&lt;span class="s"&gt;"tab-b-toggle"&lt;/span&gt; &lt;span class="na"&gt;class=&lt;/span&gt;&lt;span class="s"&gt;"tab-item"&lt;/span&gt;&lt;span class="nt"&gt;&amp;gt;&lt;/span&gt;
      &lt;span class="nt"&gt;&amp;lt;span&amp;gt;&lt;/span&gt;Tab B&lt;span class="nt"&gt;&amp;lt;/span&amp;gt;&lt;/span&gt;
      &lt;span class="nt"&gt;&amp;lt;input&lt;/span&gt; &lt;span class="na"&gt;name=&lt;/span&gt;&lt;span class="s"&gt;"tabs-toggle"&lt;/span&gt; &lt;span class="na"&gt;id=&lt;/span&gt;&lt;span class="s"&gt;"tab-b-toggle"&lt;/span&gt; &lt;span class="na"&gt;type=&lt;/span&gt;&lt;span class="s"&gt;"radio"&lt;/span&gt;&lt;span class="nt"&gt;&amp;gt;&lt;/span&gt;
    &lt;span class="nt"&gt;&amp;lt;/label&amp;gt;&lt;/span&gt;
    &lt;span class="nt"&gt;&amp;lt;label&lt;/span&gt; &lt;span class="na"&gt;for=&lt;/span&gt;&lt;span class="s"&gt;"tab-c-toggle"&lt;/span&gt; &lt;span class="na"&gt;class=&lt;/span&gt;&lt;span class="s"&gt;"tab-item"&lt;/span&gt;&lt;span class="nt"&gt;&amp;gt;&lt;/span&gt;
      &lt;span class="nt"&gt;&amp;lt;span&amp;gt;&lt;/span&gt;Tab C&lt;span class="nt"&gt;&amp;lt;/span&amp;gt;&lt;/span&gt;
      &lt;span class="nt"&gt;&amp;lt;input&lt;/span&gt; &lt;span class="na"&gt;name=&lt;/span&gt;&lt;span class="s"&gt;"tabs-toggle"&lt;/span&gt; &lt;span class="na"&gt;id=&lt;/span&gt;&lt;span class="s"&gt;"tab-c-toggle"&lt;/span&gt; &lt;span class="na"&gt;type=&lt;/span&gt;&lt;span class="s"&gt;"radio"&lt;/span&gt;&lt;span class="nt"&gt;&amp;gt;&lt;/span&gt;
    &lt;span class="nt"&gt;&amp;lt;/label&amp;gt;&lt;/span&gt;
  &lt;span class="nt"&gt;&amp;lt;/nav&amp;gt;&lt;/span&gt;

  &lt;span class="nt"&gt;&amp;lt;div&lt;/span&gt; &lt;span class="na"&gt;class=&lt;/span&gt;&lt;span class="s"&gt;"tab-content"&lt;/span&gt; &lt;span class="na"&gt;id=&lt;/span&gt;&lt;span class="s"&gt;"tab-a-content"&lt;/span&gt;&lt;span class="nt"&gt;&amp;gt;&lt;/span&gt;
    I am Tab A content
  &lt;span class="nt"&gt;&amp;lt;/div&amp;gt;&lt;/span&gt;
  &lt;span class="nt"&gt;&amp;lt;div&lt;/span&gt; &lt;span class="na"&gt;class=&lt;/span&gt;&lt;span class="s"&gt;"tab-content"&lt;/span&gt; &lt;span class="na"&gt;id=&lt;/span&gt;&lt;span class="s"&gt;"tab-b-content"&lt;/span&gt;&lt;span class="nt"&gt;&amp;gt;&lt;/span&gt;
    I am Tab B content
  &lt;span class="nt"&gt;&amp;lt;/div&amp;gt;&lt;/span&gt;
  &lt;span class="nt"&gt;&amp;lt;div&lt;/span&gt; &lt;span class="na"&gt;class=&lt;/span&gt;&lt;span class="s"&gt;"tab-content"&lt;/span&gt; &lt;span class="na"&gt;id=&lt;/span&gt;&lt;span class="s"&gt;"tab-c-content"&lt;/span&gt;&lt;span class="nt"&gt;&amp;gt;&lt;/span&gt;
    I am Tab C content
  &lt;span class="nt"&gt;&amp;lt;/div&amp;gt;&lt;/span&gt;
&lt;span class="nt"&gt;&amp;lt;/div&amp;gt;&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;



&lt;p&gt;&lt;a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fbgrgeq7z554qxbne7xd1.png" class="article-body-image-wrapper"&gt;&lt;img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fbgrgeq7z554qxbne7xd1.png" alt="Updated html structure" width="518" height="232"&gt;&lt;/a&gt;&lt;br&gt;
Nice progress!&lt;br&gt;
Since we don't want the radio inputs to be visible, we can hide them using &lt;code&gt;.tab-item input{display: none; }&lt;/code&gt; in the CSS.&lt;/p&gt;
&lt;h3&gt;
  
  
  Highlight the active tab:
&lt;/h3&gt;

&lt;p&gt;We can use the &lt;code&gt;tab-item:has(input:checked)&lt;/code&gt; selector in CSS to check if a tab has a checked input and apply styles to it.&lt;br&gt;
&lt;/p&gt;

&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight css"&gt;&lt;code&gt;&lt;span class="nc"&gt;.tab-item&lt;/span&gt; &lt;span class="nt"&gt;input&lt;/span&gt;&lt;span class="p"&gt;{&lt;/span&gt;
  &lt;span class="nl"&gt;display&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="nb"&gt;none&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;
&lt;span class="nc"&gt;.tab-item&lt;/span&gt;&lt;span class="nd"&gt;:has&lt;/span&gt;&lt;span class="o"&gt;(&lt;/span&gt;&lt;span class="nt"&gt;input&lt;/span&gt;&lt;span class="nd"&gt;:checked&lt;/span&gt;&lt;span class="o"&gt;)&lt;/span&gt;&lt;span class="p"&gt;{&lt;/span&gt;
  &lt;span class="nl"&gt;background&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="m"&gt;#6b54f0&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;



&lt;p&gt;&lt;a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fdoh4p119zmbozd6auhql.png" class="article-body-image-wrapper"&gt;&lt;img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fdoh4p119zmbozd6auhql.png" alt="Active tab visible" width="506" height="219"&gt;&lt;/a&gt;&lt;br&gt;
Amazing! Now we can see which tab is active.&lt;br&gt;
Using the same logic, we can also show/hide the content of the active tab.&lt;br&gt;
&lt;/p&gt;

&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight css"&gt;&lt;code&gt;&lt;span class="nc"&gt;.tab-content&lt;/span&gt;&lt;span class="p"&gt;{&lt;/span&gt;
  &lt;span class="nl"&gt;display&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="nb"&gt;none&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;
&lt;span class="nc"&gt;.tabs-wrapper&lt;/span&gt;&lt;span class="nd"&gt;:has&lt;/span&gt;&lt;span class="o"&gt;(&lt;/span&gt;&lt;span class="nf"&gt;#tab-a-toggle&lt;/span&gt;&lt;span class="nd"&gt;:checked&lt;/span&gt;&lt;span class="o"&gt;)&lt;/span&gt; &lt;span class="nf"&gt;#tab-a-content&lt;/span&gt;&lt;span class="p"&gt;{&lt;/span&gt;
  &lt;span class="nl"&gt;display&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="nb"&gt;block&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;
&lt;span class="nc"&gt;.tabs-wrapper&lt;/span&gt;&lt;span class="nd"&gt;:has&lt;/span&gt;&lt;span class="o"&gt;(&lt;/span&gt;&lt;span class="nf"&gt;#tab-b-toggle&lt;/span&gt;&lt;span class="nd"&gt;:checked&lt;/span&gt;&lt;span class="o"&gt;)&lt;/span&gt; &lt;span class="nf"&gt;#tab-b-content&lt;/span&gt;&lt;span class="p"&gt;{&lt;/span&gt;
  &lt;span class="nl"&gt;display&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="nb"&gt;block&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;
&lt;span class="nc"&gt;.tabs-wrapper&lt;/span&gt;&lt;span class="nd"&gt;:has&lt;/span&gt;&lt;span class="o"&gt;(&lt;/span&gt;&lt;span class="nf"&gt;#tab-c-toggle&lt;/span&gt;&lt;span class="nd"&gt;:checked&lt;/span&gt;&lt;span class="o"&gt;)&lt;/span&gt; &lt;span class="nf"&gt;#tab-c-content&lt;/span&gt;&lt;span class="p"&gt;{&lt;/span&gt;
  &lt;span class="nl"&gt;display&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="nb"&gt;block&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;



&lt;p&gt;&lt;a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fyrom935yn23zifdmsbbv.gif" class="article-body-image-wrapper"&gt;&lt;img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fyrom935yn23zifdmsbbv.gif" alt="Final result" width="800" height="463"&gt;&lt;/a&gt;&lt;/p&gt;

&lt;h3&gt;
  
  
  Final code:
&lt;/h3&gt;



&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight html"&gt;&lt;code&gt;&lt;span class="nt"&gt;&amp;lt;div&lt;/span&gt; &lt;span class="na"&gt;class=&lt;/span&gt;&lt;span class="s"&gt;"tabs-wrapper"&lt;/span&gt;&lt;span class="nt"&gt;&amp;gt;&lt;/span&gt;  
  &lt;span class="nt"&gt;&amp;lt;nav&lt;/span&gt; &lt;span class="na"&gt;class=&lt;/span&gt;&lt;span class="s"&gt;"tabs-nav"&lt;/span&gt;&lt;span class="nt"&gt;&amp;gt;&lt;/span&gt;
    &lt;span class="nt"&gt;&amp;lt;label&lt;/span&gt; &lt;span class="na"&gt;for=&lt;/span&gt;&lt;span class="s"&gt;"tab-a-toggle"&lt;/span&gt; &lt;span class="na"&gt;class=&lt;/span&gt;&lt;span class="s"&gt;"tab-item"&lt;/span&gt;&lt;span class="nt"&gt;&amp;gt;&lt;/span&gt;
      &lt;span class="nt"&gt;&amp;lt;span&amp;gt;&lt;/span&gt;Tab A&lt;span class="nt"&gt;&amp;lt;/span&amp;gt;&lt;/span&gt;
      &lt;span class="nt"&gt;&amp;lt;input&lt;/span&gt; &lt;span class="na"&gt;checked&lt;/span&gt; &lt;span class="na"&gt;name=&lt;/span&gt;&lt;span class="s"&gt;"tabs-toggle"&lt;/span&gt; &lt;span class="na"&gt;id=&lt;/span&gt;&lt;span class="s"&gt;"tab-a-toggle"&lt;/span&gt; &lt;span class="na"&gt;type=&lt;/span&gt;&lt;span class="s"&gt;"radio"&lt;/span&gt;&lt;span class="nt"&gt;&amp;gt;&lt;/span&gt;
    &lt;span class="nt"&gt;&amp;lt;/label&amp;gt;&lt;/span&gt;
    &lt;span class="nt"&gt;&amp;lt;label&lt;/span&gt; &lt;span class="na"&gt;for=&lt;/span&gt;&lt;span class="s"&gt;"tab-b-toggle"&lt;/span&gt; &lt;span class="na"&gt;class=&lt;/span&gt;&lt;span class="s"&gt;"tab-item"&lt;/span&gt;&lt;span class="nt"&gt;&amp;gt;&lt;/span&gt;
      &lt;span class="nt"&gt;&amp;lt;span&amp;gt;&lt;/span&gt;Tab B&lt;span class="nt"&gt;&amp;lt;/span&amp;gt;&lt;/span&gt;
      &lt;span class="nt"&gt;&amp;lt;input&lt;/span&gt; &lt;span class="na"&gt;name=&lt;/span&gt;&lt;span class="s"&gt;"tabs-toggle"&lt;/span&gt; &lt;span class="na"&gt;id=&lt;/span&gt;&lt;span class="s"&gt;"tab-b-toggle"&lt;/span&gt; &lt;span class="na"&gt;type=&lt;/span&gt;&lt;span class="s"&gt;"radio"&lt;/span&gt;&lt;span class="nt"&gt;&amp;gt;&lt;/span&gt;
    &lt;span class="nt"&gt;&amp;lt;/label&amp;gt;&lt;/span&gt;
    &lt;span class="nt"&gt;&amp;lt;label&lt;/span&gt; &lt;span class="na"&gt;for=&lt;/span&gt;&lt;span class="s"&gt;"tab-c-toggle"&lt;/span&gt; &lt;span class="na"&gt;class=&lt;/span&gt;&lt;span class="s"&gt;"tab-item"&lt;/span&gt;&lt;span class="nt"&gt;&amp;gt;&lt;/span&gt;
      &lt;span class="nt"&gt;&amp;lt;span&amp;gt;&lt;/span&gt;Tab C&lt;span class="nt"&gt;&amp;lt;/span&amp;gt;&lt;/span&gt;
      &lt;span class="nt"&gt;&amp;lt;input&lt;/span&gt; &lt;span class="na"&gt;name=&lt;/span&gt;&lt;span class="s"&gt;"tabs-toggle"&lt;/span&gt; &lt;span class="na"&gt;id=&lt;/span&gt;&lt;span class="s"&gt;"tab-c-toggle"&lt;/span&gt; &lt;span class="na"&gt;type=&lt;/span&gt;&lt;span class="s"&gt;"radio"&lt;/span&gt;&lt;span class="nt"&gt;&amp;gt;&lt;/span&gt;
    &lt;span class="nt"&gt;&amp;lt;/label&amp;gt;&lt;/span&gt;
  &lt;span class="nt"&gt;&amp;lt;/nav&amp;gt;&lt;/span&gt;

  &lt;span class="nt"&gt;&amp;lt;div&lt;/span&gt; &lt;span class="na"&gt;class=&lt;/span&gt;&lt;span class="s"&gt;"tab-content"&lt;/span&gt; &lt;span class="na"&gt;id=&lt;/span&gt;&lt;span class="s"&gt;"tab-a-content"&lt;/span&gt;&lt;span class="nt"&gt;&amp;gt;&lt;/span&gt;
    I am Tab A content
  &lt;span class="nt"&gt;&amp;lt;/div&amp;gt;&lt;/span&gt;
  &lt;span class="nt"&gt;&amp;lt;div&lt;/span&gt; &lt;span class="na"&gt;class=&lt;/span&gt;&lt;span class="s"&gt;"tab-content"&lt;/span&gt; &lt;span class="na"&gt;id=&lt;/span&gt;&lt;span class="s"&gt;"tab-b-content"&lt;/span&gt;&lt;span class="nt"&gt;&amp;gt;&lt;/span&gt;
    I am Tab B content
  &lt;span class="nt"&gt;&amp;lt;/div&amp;gt;&lt;/span&gt;
  &lt;span class="nt"&gt;&amp;lt;div&lt;/span&gt; &lt;span class="na"&gt;class=&lt;/span&gt;&lt;span class="s"&gt;"tab-content"&lt;/span&gt; &lt;span class="na"&gt;id=&lt;/span&gt;&lt;span class="s"&gt;"tab-c-content"&lt;/span&gt;&lt;span class="nt"&gt;&amp;gt;&lt;/span&gt;
    I am Tab C content
  &lt;span class="nt"&gt;&amp;lt;/div&amp;gt;&lt;/span&gt;
&lt;span class="nt"&gt;&amp;lt;/div&amp;gt;&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;





&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight css"&gt;&lt;code&gt;&lt;span class="nt"&gt;body&lt;/span&gt;&lt;span class="p"&gt;{&lt;/span&gt;
  &lt;span class="nl"&gt;font-family&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="n"&gt;Arial&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
  &lt;span class="nl"&gt;padding&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="m"&gt;1em&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;

&lt;span class="nc"&gt;.tabs-nav&lt;/span&gt;&lt;span class="p"&gt;{&lt;/span&gt;
  &lt;span class="nl"&gt;display&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="n"&gt;flex&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
  &lt;span class="py"&gt;gap&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="m"&gt;8px&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
  &lt;span class="nl"&gt;margin-bottom&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="m"&gt;16px&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
  &lt;span class="py"&gt;user-select&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="nb"&gt;none&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;

&lt;span class="nc"&gt;.tab-item&lt;/span&gt;&lt;span class="p"&gt;{&lt;/span&gt;
  &lt;span class="nl"&gt;background&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="m"&gt;#bcbcbc&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
  &lt;span class="nl"&gt;padding&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="m"&gt;6px&lt;/span&gt; &lt;span class="m"&gt;12px&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
  &lt;span class="nl"&gt;border-radius&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="m"&gt;6px&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
  &lt;span class="nl"&gt;color&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="m"&gt;#fff&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
  &lt;span class="nl"&gt;cursor&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="nb"&gt;pointer&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;
&lt;span class="nc"&gt;.tab-content&lt;/span&gt;&lt;span class="p"&gt;{&lt;/span&gt;
  &lt;span class="nl"&gt;padding&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="m"&gt;12px&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
  &lt;span class="nl"&gt;border-radius&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="m"&gt;16px&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
  &lt;span class="nl"&gt;border&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="m"&gt;1px&lt;/span&gt; &lt;span class="nb"&gt;solid&lt;/span&gt; &lt;span class="n"&gt;grey&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;

&lt;span class="nc"&gt;.tab-item&lt;/span&gt; &lt;span class="nt"&gt;input&lt;/span&gt;&lt;span class="p"&gt;{&lt;/span&gt;
  &lt;span class="nl"&gt;display&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="nb"&gt;none&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;
&lt;span class="nc"&gt;.tab-item&lt;/span&gt;&lt;span class="nd"&gt;:has&lt;/span&gt;&lt;span class="o"&gt;(&lt;/span&gt;&lt;span class="nt"&gt;input&lt;/span&gt;&lt;span class="nd"&gt;:checked&lt;/span&gt;&lt;span class="o"&gt;)&lt;/span&gt;&lt;span class="p"&gt;{&lt;/span&gt;
  &lt;span class="nl"&gt;background&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="m"&gt;#6b54f0&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;

&lt;span class="nc"&gt;.tab-content&lt;/span&gt;&lt;span class="p"&gt;{&lt;/span&gt;
  &lt;span class="nl"&gt;display&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="nb"&gt;none&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;

&lt;span class="nc"&gt;.tabs-wrapper&lt;/span&gt;&lt;span class="nd"&gt;:has&lt;/span&gt;&lt;span class="o"&gt;(&lt;/span&gt;&lt;span class="nf"&gt;#tab-a-toggle&lt;/span&gt;&lt;span class="nd"&gt;:checked&lt;/span&gt;&lt;span class="o"&gt;)&lt;/span&gt; &lt;span class="nf"&gt;#tab-a-content&lt;/span&gt;&lt;span class="p"&gt;{&lt;/span&gt;
  &lt;span class="nl"&gt;display&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="nb"&gt;block&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;
&lt;span class="nc"&gt;.tabs-wrapper&lt;/span&gt;&lt;span class="nd"&gt;:has&lt;/span&gt;&lt;span class="o"&gt;(&lt;/span&gt;&lt;span class="nf"&gt;#tab-b-toggle&lt;/span&gt;&lt;span class="nd"&gt;:checked&lt;/span&gt;&lt;span class="o"&gt;)&lt;/span&gt; &lt;span class="nf"&gt;#tab-b-content&lt;/span&gt;&lt;span class="p"&gt;{&lt;/span&gt;
  &lt;span class="nl"&gt;display&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="nb"&gt;block&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;
&lt;span class="nc"&gt;.tabs-wrapper&lt;/span&gt;&lt;span class="nd"&gt;:has&lt;/span&gt;&lt;span class="o"&gt;(&lt;/span&gt;&lt;span class="nf"&gt;#tab-c-toggle&lt;/span&gt;&lt;span class="nd"&gt;:checked&lt;/span&gt;&lt;span class="o"&gt;)&lt;/span&gt; &lt;span class="nf"&gt;#tab-c-content&lt;/span&gt;&lt;span class="p"&gt;{&lt;/span&gt;
  &lt;span class="nl"&gt;display&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="nb"&gt;block&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;



&lt;h3&gt;
  
  
  Thank you for reading!
&lt;/h3&gt;

&lt;p&gt;If you enjoyed this article, please consider sharing it with others.&lt;br&gt;
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</description>
      <category>css</category>
      <category>webdev</category>
      <category>programming</category>
      <category>beginners</category>
    </item>
    <item>
      <title>When semicolon isn't optional in JavaScript</title>
      <dc:creator>Shuvo</dc:creator>
      <pubDate>Mon, 02 Jun 2025 01:58:27 +0000</pubDate>
      <link>https://dev.to/0shuvo0/when-semicolon-isnt-optional-in-javascript-1blp</link>
      <guid>https://dev.to/0shuvo0/when-semicolon-isnt-optional-in-javascript-1blp</guid>
      <description>&lt;p&gt;Original article: &lt;a href="https://www.wtfcodes.com/wtf-articles/read/When-semicolon-isnt-optional-in-JavaScript" rel="noopener noreferrer"&gt;wtfcodes.com&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;TL;DR: In JavaScript, semicolons are optional at the end of statements, but there are specific cases where omitting them can lead to unexpected behavior or errors.&lt;/p&gt;

&lt;h3&gt;
  
  
  Without semicolon:
&lt;/h3&gt;

&lt;p&gt;In the following example, I am trying to access an element in an array using idx variable and console log if the number is even or odd.&lt;br&gt;
And since semicolon is optional in JavaScript, I have not used any semicolon at the end of the statement.&lt;br&gt;
&lt;/p&gt;

&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight javascript"&gt;&lt;code&gt;&lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;array&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="p"&gt;[&lt;/span&gt;&lt;span class="mi"&gt;1&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="mi"&gt;2&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="mi"&gt;3&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="mi"&gt;4&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="mi"&gt;5&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="mi"&gt;6&lt;/span&gt;&lt;span class="p"&gt;]&lt;/span&gt;
&lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;idx&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="mi"&gt;2&lt;/span&gt;
&lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;num&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="nx"&gt;array&lt;/span&gt;&lt;span class="p"&gt;[&lt;/span&gt;&lt;span class="nx"&gt;idx&lt;/span&gt;&lt;span class="p"&gt;]&lt;/span&gt;
&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;num&lt;/span&gt; &lt;span class="o"&gt;&amp;amp;&amp;amp;&lt;/span&gt; &lt;span class="nx"&gt;num&lt;/span&gt; &lt;span class="o"&gt;%&lt;/span&gt; &lt;span class="mi"&gt;2&lt;/span&gt; &lt;span class="o"&gt;===&lt;/span&gt; &lt;span class="mi"&gt;0&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt;
            &lt;span class="p"&gt;?&lt;/span&gt; &lt;span class="nx"&gt;console&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;log&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;Even&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt;
      &lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="nx"&gt;console&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;log&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;Odd&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;



&lt;p&gt;Everything seems fine, right?&lt;br&gt;
But wait, we got errors in the console.&lt;/p&gt;

&lt;p&gt;&lt;a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2F1kwnbiq8bwm3d2jxnnzk.png" class="article-body-image-wrapper"&gt;&lt;img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2F1kwnbiq8bwm3d2jxnnzk.png" alt="Without semicolon: error" width="409" height="192"&gt;&lt;/a&gt;&lt;/p&gt;
&lt;h3&gt;
  
  
  With semicolon:
&lt;/h3&gt;

&lt;p&gt;Now let's add semicolons at the end of the statements.&lt;br&gt;
&lt;/p&gt;

&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight javascript"&gt;&lt;code&gt;&lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;array&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="p"&gt;[&lt;/span&gt;&lt;span class="mi"&gt;1&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="mi"&gt;2&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="mi"&gt;3&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="mi"&gt;4&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="mi"&gt;5&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="mi"&gt;6&lt;/span&gt;&lt;span class="p"&gt;];&lt;/span&gt;
&lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;idx&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="mi"&gt;2&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
&lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;num&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="nx"&gt;array&lt;/span&gt;&lt;span class="p"&gt;[&lt;/span&gt;&lt;span class="nx"&gt;idx&lt;/span&gt;&lt;span class="p"&gt;];&lt;/span&gt;
&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;num&lt;/span&gt; &lt;span class="o"&gt;&amp;amp;&amp;amp;&lt;/span&gt; &lt;span class="nx"&gt;num&lt;/span&gt; &lt;span class="o"&gt;%&lt;/span&gt; &lt;span class="mi"&gt;2&lt;/span&gt; &lt;span class="o"&gt;===&lt;/span&gt; &lt;span class="mi"&gt;0&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt;
            &lt;span class="p"&gt;?&lt;/span&gt; &lt;span class="nx"&gt;console&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;log&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;Even&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt;
      &lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="nx"&gt;console&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;log&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;Odd&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="p"&gt;);&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;



&lt;p&gt;And look that, Everything works fine now!&lt;br&gt;
&lt;a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2F4ka60bp8h2qltosmefzp.png" class="article-body-image-wrapper"&gt;&lt;img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2F4ka60bp8h2qltosmefzp.png" alt="With semicolon: working" width="243" height="83"&gt;&lt;/a&gt;&lt;br&gt;
And look that, Everything works fine now!&lt;/p&gt;
&lt;h3&gt;
  
  
  So WTF?
&lt;/h3&gt;

&lt;p&gt;The deal breaker line here is &lt;code&gt;const num = array[idx]&lt;/code&gt;. Because it is followed by &lt;code&gt;(num &amp;amp;&amp;amp; num % 2 === 0) ? console.log("Even") : console.log("Odd");&lt;/code&gt;&lt;/p&gt;

&lt;p&gt;&lt;strong&gt;Why?&lt;/strong&gt; Lets say our array contained functions that returns a number.&lt;br&gt;
&lt;/p&gt;

&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight javascript"&gt;&lt;code&gt;&lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;fn1&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="p"&gt;()&lt;/span&gt; &lt;span class="o"&gt;=&amp;gt;&lt;/span&gt; &lt;span class="mi"&gt;1&lt;/span&gt;
&lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;fn2&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="p"&gt;()&lt;/span&gt; &lt;span class="o"&gt;=&amp;gt;&lt;/span&gt; &lt;span class="mi"&gt;2&lt;/span&gt;
&lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;fn3&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="p"&gt;()&lt;/span&gt; &lt;span class="o"&gt;=&amp;gt;&lt;/span&gt; &lt;span class="mi"&gt;3&lt;/span&gt;
&lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;fn4&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="p"&gt;()&lt;/span&gt; &lt;span class="o"&gt;=&amp;gt;&lt;/span&gt; &lt;span class="mi"&gt;4&lt;/span&gt;
&lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;fn5&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="p"&gt;()&lt;/span&gt; &lt;span class="o"&gt;=&amp;gt;&lt;/span&gt; &lt;span class="mi"&gt;5&lt;/span&gt;

&lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;array&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="p"&gt;[&lt;/span&gt; &lt;span class="nx"&gt;fn1&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="nx"&gt;fn2&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="nx"&gt;fn3&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="nx"&gt;fn4&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="nx"&gt;fn5&lt;/span&gt; &lt;span class="p"&gt;]&lt;/span&gt;
&lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;idx&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="mi"&gt;2&lt;/span&gt;
&lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;num&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="nx"&gt;array&lt;/span&gt;&lt;span class="p"&gt;[&lt;/span&gt;&lt;span class="nx"&gt;idx&lt;/span&gt;&lt;span class="p"&gt;]&lt;/span&gt;

&lt;span class="nx"&gt;console&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;log&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;num&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="c1"&gt;//Output: function fn3() {}&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;



&lt;p&gt;It logs &lt;code&gt;function fn3() {}&lt;/code&gt; in the console.&lt;br&gt;
But we want num to be the return value of the function. So we need to call the function like this: c&lt;code&gt;onst num = array[idx]()&lt;/code&gt; that way we are calling &lt;strong&gt;fn3&lt;/strong&gt; num will be the return value of the function.&lt;br&gt;
&lt;/p&gt;

&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight javascript"&gt;&lt;code&gt;&lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;num&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="nx"&gt;array&lt;/span&gt;&lt;span class="p"&gt;[&lt;/span&gt;&lt;span class="nx"&gt;idx&lt;/span&gt;&lt;span class="p"&gt;]()&lt;/span&gt;

&lt;span class="nx"&gt;console&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;log&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;num&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="c1"&gt;//Output: 3&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;



&lt;p&gt;Since fn3 doesn't take any arguments, its deosnt matter if we pass any argument or not the function will still return the same value.&lt;br&gt;
And we could also call the function in the next line and it will still work the same way.&lt;br&gt;
&lt;/p&gt;

&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight javascript"&gt;&lt;code&gt;&lt;span class="c1"&gt;//It doen't matter what we pass as argument&lt;/span&gt;
&lt;span class="c1"&gt;//Since fn3 doesn't take any argument, it will still return the same value&lt;/span&gt;
&lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;num&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="nx"&gt;array&lt;/span&gt;&lt;span class="p"&gt;[&lt;/span&gt;&lt;span class="nx"&gt;idx&lt;/span&gt;&lt;span class="p"&gt;]&lt;/span&gt;
&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nb"&gt;Math&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;random&lt;/span&gt;&lt;span class="p"&gt;()&lt;/span&gt; &lt;span class="o"&gt;&amp;gt;&lt;/span&gt; &lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="mi"&gt;5&lt;/span&gt; &lt;span class="p"&gt;?&lt;/span&gt; &lt;span class="mi"&gt;1&lt;/span&gt; &lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="mi"&gt;0&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt;

&lt;span class="nx"&gt;console&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;log&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;num&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="c1"&gt;//Output: 3&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;



&lt;h3&gt;
  
  
  Did you catch it?
&lt;/h3&gt;

&lt;p&gt;In our first example we were accidentally performing a &lt;strong&gt;function call&lt;/strong&gt; on &lt;code&gt;array[idx]&lt;/code&gt; which is a number and not a function, which is obviously wrong.&lt;br&gt;
But when we add a semicolon at the end of the statement: &lt;code&gt;const num = array[idx]&lt;/code&gt; the statement ends and the next line is treated as a new statement and not a function call.&lt;br&gt;
&lt;/p&gt;

&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight javascript"&gt;&lt;code&gt;&lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;array&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="p"&gt;[&lt;/span&gt;&lt;span class="mi"&gt;1&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="mi"&gt;2&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="mi"&gt;3&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="mi"&gt;4&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="mi"&gt;5&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="mi"&gt;6&lt;/span&gt;&lt;span class="p"&gt;]&lt;/span&gt;
&lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;idx&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="mi"&gt;2&lt;/span&gt;
&lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;num&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="nx"&gt;array&lt;/span&gt;&lt;span class="p"&gt;[&lt;/span&gt;&lt;span class="nx"&gt;idx&lt;/span&gt;&lt;span class="p"&gt;];&lt;/span&gt; &lt;span class="c1"&gt;//the semicolon ends the statement&lt;/span&gt;
&lt;span class="c1"&gt;//So the next line is treated as a new statement and not a function call&lt;/span&gt;
&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;num&lt;/span&gt; &lt;span class="o"&gt;&amp;amp;&amp;amp;&lt;/span&gt; &lt;span class="nx"&gt;num&lt;/span&gt; &lt;span class="o"&gt;%&lt;/span&gt; &lt;span class="mi"&gt;2&lt;/span&gt; &lt;span class="o"&gt;===&lt;/span&gt; &lt;span class="mi"&gt;0&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt;
            &lt;span class="p"&gt;?&lt;/span&gt; &lt;span class="nx"&gt;console&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;log&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;Even&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt;
      &lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="nx"&gt;console&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;log&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;Odd&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;



&lt;h3&gt;
  
  
  Thank you for reading!
&lt;/h3&gt;

&lt;p&gt;If you enjoyed this article, please consider sharing it with others.&lt;br&gt;
You can support me on &lt;a href="https://buymeacoffee.com/0shuvo0" rel="noopener noreferrer"&gt;Buy Me a Coffee&lt;/a&gt;.&lt;br&gt;
If you have any feedback or suggestions, feel free to reach out to me on &lt;a href="https://twitter.com/0shuvo0" rel="noopener noreferrer"&gt;Twitter&lt;/a&gt;.&lt;/p&gt;

</description>
      <category>webdev</category>
      <category>javascript</category>
      <category>programming</category>
      <category>beginners</category>
    </item>
    <item>
      <title>I forgot about el.outerHTML so I made this</title>
      <dc:creator>Shuvo</dc:creator>
      <pubDate>Mon, 07 Feb 2022 05:02:53 +0000</pubDate>
      <link>https://dev.to/0shuvo0/i-forgot-about-elouterhtml-so-i-made-this-19m6</link>
      <guid>https://dev.to/0shuvo0/i-forgot-about-elouterhtml-so-i-made-this-19m6</guid>
      <description>&lt;p&gt;This morning I needed to convert a DOM element into a sting. And at the time I forgot about the &lt;code&gt;el.outerHTML&lt;/code&gt; method. And I know the &lt;code&gt;el.innerHTML&lt;/code&gt; will not include in element itself. It will only give inner HTML. So after doing a quick Google I was remined about the &lt;code&gt;outerHTML&lt;/code&gt; method. And my issue was solved!&lt;/p&gt;

&lt;p&gt;But this got me thinking how could I do it if there was no &lt;code&gt;innerHTML&lt;/code&gt; or &lt;code&gt;outerHTML&lt;/code&gt; method.&lt;br&gt;
And thus &lt;a href="https://www.npmjs.com/package/htmltostring" rel="noopener noreferrer"&gt;htmlToString&lt;/a&gt; was born.&lt;br&gt;
&lt;/p&gt;
&lt;div class="ltag-github-readme-tag"&gt;
  &lt;div class="readme-overview"&gt;
    &lt;h2&gt;
      &lt;img src="https://assets.dev.to/assets/github-logo-5a155e1f9a670af7944dd5e12375bc76ed542ea80224905ecaf878b9157cdefc.svg" alt="GitHub logo"&gt;
      &lt;a href="https://github.com/0shuvo0" rel="noopener noreferrer"&gt;
        0shuvo0
      &lt;/a&gt; / &lt;a href="https://github.com/0shuvo0/htmlToString" rel="noopener noreferrer"&gt;
        htmlToString
      &lt;/a&gt;
    &lt;/h2&gt;
    &lt;h3&gt;
      I forgot about el.outerHTML so I made this, it takes a DOM element and returns its html as string
    &lt;/h3&gt;
  &lt;/div&gt;
  &lt;div class="ltag-github-body"&gt;
    
&lt;div id="readme" class="md"&gt;
&lt;p&gt;&lt;a rel="noopener noreferrer" href="https://github.com/0shuvo0/htmlToString/raw/main/preview.png"&gt;&lt;img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fgithub.com%2F0shuvo0%2FhtmlToString%2Fraw%2Fmain%2Fpreview.png" alt="htmlToString explaination meme"&gt;&lt;/a&gt;&lt;/p&gt;
&lt;div class="markdown-heading"&gt;
&lt;h1 class="heading-element"&gt;htmlToString&lt;/h1&gt;

&lt;/div&gt;
&lt;div class="markdown-heading"&gt;
&lt;h2 class="heading-element"&gt;Convert html/DOM element to string&lt;/h2&gt;

&lt;/div&gt;
&lt;div class="markdown-heading"&gt;
&lt;h3 class="heading-element"&gt;Works with rendered and virtual DOM&lt;/h3&gt;

&lt;/div&gt;
&lt;div class="markdown-heading"&gt;
&lt;h3 class="heading-element"&gt;Installation&lt;/h3&gt;

&lt;/div&gt;
&lt;p&gt;&lt;code&gt;npm install htmltostring&lt;/code&gt;&lt;/p&gt;
&lt;div class="markdown-heading"&gt;
&lt;h3 class="heading-element"&gt;Or using CDN&lt;/h3&gt;

&lt;/div&gt;
&lt;div class="highlight highlight-text-html-basic notranslate position-relative overflow-auto js-code-highlight"&gt;
&lt;pre&gt;&lt;span class="pl-kos"&gt;&amp;lt;&lt;/span&gt;&lt;span class="pl-ent"&gt;script&lt;/span&gt; &lt;span class="pl-c1"&gt;src&lt;/span&gt;="&lt;span class="pl-s"&gt;https://cdn.jsdelivr.net/npm/htmltostring@1.0.6/htmlToString.min.js&lt;/span&gt;"&lt;span class="pl-kos"&gt;&amp;gt;&lt;/span&gt;&lt;span class="pl-kos"&gt;&amp;lt;/&lt;/span&gt;&lt;span class="pl-ent"&gt;script&lt;/span&gt;&lt;span class="pl-kos"&gt;&amp;gt;&lt;/span&gt;&lt;/pre&gt;

&lt;/div&gt;
&lt;div class="markdown-heading"&gt;
&lt;h3 class="heading-element"&gt;Usage&lt;/h3&gt;

&lt;/div&gt;
&lt;div class="highlight highlight-source-js notranslate position-relative overflow-auto js-code-highlight"&gt;
&lt;pre&gt;&lt;span class="pl-c"&gt;//you don't have to import if you're using CDN&lt;/span&gt;
&lt;span class="pl-k"&gt;import&lt;/span&gt; &lt;span class="pl-s1"&gt;htmlToString&lt;/span&gt; &lt;span class="pl-k"&gt;from&lt;/span&gt; &lt;span class="pl-s"&gt;'htmltostring'&lt;/span&gt;

&lt;span class="pl-smi"&gt;console&lt;/span&gt;&lt;span class="pl-kos"&gt;.&lt;/span&gt;&lt;span class="pl-en"&gt;log&lt;/span&gt;&lt;span class="pl-kos"&gt;(&lt;/span&gt;&lt;span class="pl-en"&gt;htmlToString&lt;/span&gt;&lt;span class="pl-kos"&gt;(&lt;/span&gt;&lt;span class="pl-s"&gt;'.container'&lt;/span&gt;&lt;span class="pl-kos"&gt;)&lt;/span&gt;&lt;span class="pl-kos"&gt;)&lt;/span&gt;
&lt;span class="pl-c"&gt;// or &lt;/span&gt;
&lt;span class="pl-c"&gt;// const container = document.querySelector('.container')&lt;/span&gt;
&lt;span class="pl-c"&gt;// console.log(htmlToString(container))&lt;/span&gt;&lt;/pre&gt;

&lt;/div&gt;
&lt;div class="markdown-heading"&gt;
&lt;h3 class="heading-element"&gt;Example Output&lt;/h3&gt;

&lt;/div&gt;
&lt;div class="snippet-clipboard-content notranslate position-relative overflow-auto"&gt;&lt;pre class="notranslate"&gt;&lt;code&gt;&amp;lt;div class="container"&amp;gt;
    &amp;lt;h1&amp;gt;Hello World&amp;lt;/h1&amp;gt;
&amp;lt;/div&amp;gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;
&lt;/div&gt;



&lt;/div&gt;
&lt;br&gt;
  &lt;div class="gh-btn-container"&gt;&lt;a class="gh-btn" href="https://github.com/0shuvo0/htmlToString" rel="noopener noreferrer"&gt;View on GitHub&lt;/a&gt;&lt;/div&gt;
&lt;br&gt;
&lt;/div&gt;
&lt;br&gt;


&lt;p&gt;And it was very simple to do using recursion.&lt;/p&gt;

&lt;h2&gt;
  
  
  There was just three main question.
&lt;/h2&gt;

&lt;ol&gt;
&lt;li&gt;What's the tag name of the element&lt;/li&gt;
&lt;li&gt;How to get all the attributes present on a HTML element&lt;/li&gt;
&lt;li&gt;Check if a tag is self closing tag or not&lt;/li&gt;
&lt;/ol&gt;

&lt;h2&gt;
  
  
  And here are the answers
&lt;/h2&gt;

&lt;h3&gt;
  
  
  What's the tag name of the element
&lt;/h3&gt;

&lt;p&gt;You can easily get the tag name of the element like this&lt;br&gt;
&lt;/p&gt;

&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight javascript"&gt;&lt;code&gt;&lt;span class="kd"&gt;let&lt;/span&gt; &lt;span class="nx"&gt;tagName&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="nx"&gt;el&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;tagName&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;toLowerCase&lt;/span&gt;&lt;span class="p"&gt;()&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;

&lt;h3&gt;
  
  
  How to get all the attributes present on a HTML element
&lt;/h3&gt;

&lt;p&gt;&lt;code&gt;el.attributes&lt;/code&gt; returns a list of attribute present on the element.&lt;br&gt;
&lt;/p&gt;
&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight javascript"&gt;&lt;code&gt;&lt;span class="p"&gt;[...&lt;/span&gt;&lt;span class="nx"&gt;el&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;attributes&lt;/span&gt;&lt;span class="p"&gt;].&lt;/span&gt;&lt;span class="nf"&gt;map&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;e&lt;/span&gt; &lt;span class="o"&gt;=&amp;gt;&lt;/span&gt; &lt;span class="s2"&gt;`&lt;/span&gt;&lt;span class="p"&gt;${&lt;/span&gt;&lt;span class="nx"&gt;e&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;name&lt;/span&gt;&lt;span class="p"&gt;}&lt;/span&gt;&lt;span class="s2"&gt;="&lt;/span&gt;&lt;span class="p"&gt;${&lt;/span&gt;&lt;span class="nx"&gt;e&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;value&lt;/span&gt;&lt;span class="p"&gt;}&lt;/span&gt;&lt;span class="s2"&gt;"`&lt;/span&gt;&lt;span class="p"&gt;).&lt;/span&gt;&lt;span class="nf"&gt;join&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt; &lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt;

&lt;span class="c1"&gt;//example outcome&lt;/span&gt;
&lt;span class="c1"&gt;//'class="main" type="text"'&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;

&lt;h3&gt;
  
  
  Check if a tag is self closing tag or not
&lt;/h3&gt;

&lt;p&gt;First we can create an array or self closing tags and then check if tag name is present in the array&lt;br&gt;
&lt;/p&gt;
&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight javascript"&gt;&lt;code&gt;&lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;selfClosingTags&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="p"&gt;[&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="s1"&gt;area&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="s1"&gt;base&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="s1"&gt;br&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="s1"&gt;col&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="s1"&gt;embed&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="s1"&gt;hr&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="s1"&gt;img&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="s1"&gt;input&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="s1"&gt;link&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="s1"&gt;meta&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="s1"&gt;param&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="s1"&gt;source&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="s1"&gt;track&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="s1"&gt;wbr&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="p"&gt;]&lt;/span&gt;
&lt;span class="k"&gt;if&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;selfClosingTags&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;includes&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;tagName&lt;/span&gt;&lt;span class="p"&gt;)){&lt;/span&gt;
    &lt;span class="nx"&gt;console&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;log&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;Self closing tag&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;


&lt;p&gt;And with all the questions answered the function was very easy to implement.&lt;br&gt;
You can see the full code &lt;a href="https://github.com/0shuvo0/htmlToString/blob/main/index.js" rel="noopener noreferrer"&gt;here&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;Found it useless, I mean helpful? &lt;a href="https://www.buymeacoffee.com/0shuvo0" rel="noopener noreferrer"&gt;By me a Coffee ☕&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;Make sure you checkout my other articles and &lt;a href="https://www.youtube.com/c/AngleBrace" rel="noopener noreferrer"&gt;YouTube channel&lt;/a&gt;&lt;br&gt;
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</description>
      <category>javascript</category>
      <category>webdev</category>
      <category>npm</category>
      <category>productivity</category>
    </item>
    <item>
      <title>Let's create an Add Tags input with REACT JS</title>
      <dc:creator>Shuvo</dc:creator>
      <pubDate>Mon, 17 Jan 2022 03:57:25 +0000</pubDate>
      <link>https://dev.to/0shuvo0/lets-create-an-add-tags-input-with-react-js-d29</link>
      <guid>https://dev.to/0shuvo0/lets-create-an-add-tags-input-with-react-js-d29</guid>
      <description>&lt;p&gt;In this article I will show you guys how you can create this multiple tags input using React.JS and a bit of CSS&lt;br&gt;
&lt;a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fp76m0n8p91ilzzy1c0tz.png" class="article-body-image-wrapper"&gt;&lt;img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fp76m0n8p91ilzzy1c0tz.png" alt="React JS Add React JS Add Tags Input Tags Input Demo" width="799" height="338"&gt;&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;Lets create a new react js project by running &lt;code&gt;npx create-react-app myapp&lt;/code&gt;&lt;br&gt;
Now to simplify things I am goin to delete all the files inside &lt;strong&gt;src&lt;/strong&gt; folder except for &lt;code&gt;App.js&lt;/code&gt; and &lt;code&gt;index.js&lt;/code&gt; and create a &lt;code&gt;style.css&lt;/code&gt; file. So our folder structure should look like this &lt;a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fqefxn9j19xo0j39wtr9o.png" class="article-body-image-wrapper"&gt;&lt;img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fqefxn9j19xo0j39wtr9o.png" alt="React app folder structure" width="151" height="218"&gt;&lt;/a&gt;&lt;br&gt;
Great now let's also delete all the unnecessary codes from &lt;code&gt;index.js&lt;/code&gt; and &lt;code&gt;App.js&lt;/code&gt;&lt;br&gt;
&lt;/p&gt;

&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight javascript"&gt;&lt;code&gt;&lt;span class="c1"&gt;// src/index.js&lt;/span&gt;
&lt;span class="k"&gt;import&lt;/span&gt; &lt;span class="nx"&gt;React&lt;/span&gt; &lt;span class="k"&gt;from&lt;/span&gt; &lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="s1"&gt;react&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
&lt;span class="k"&gt;import&lt;/span&gt; &lt;span class="nx"&gt;ReactDOM&lt;/span&gt; &lt;span class="k"&gt;from&lt;/span&gt; &lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="s1"&gt;react-dom&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
&lt;span class="k"&gt;import&lt;/span&gt; &lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;./style.css&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
&lt;span class="k"&gt;import&lt;/span&gt; &lt;span class="nx"&gt;App&lt;/span&gt; &lt;span class="k"&gt;from&lt;/span&gt; &lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="s1"&gt;./App&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;

&lt;span class="nx"&gt;ReactDOM&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;render&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;
  &lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="nx"&gt;React&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;StrictMode&lt;/span&gt;&lt;span class="o"&gt;&amp;gt;&lt;/span&gt;
    &lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="nx"&gt;App&lt;/span&gt; &lt;span class="o"&gt;/&amp;gt;&lt;/span&gt;
  &lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="sr"&gt;/React.StrictMode&amp;gt;&lt;/span&gt;&lt;span class="err"&gt;,
&lt;/span&gt;  &lt;span class="nb"&gt;document&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;getElementById&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="s1"&gt;root&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt;
&lt;span class="p"&gt;);&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;



&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight javascript"&gt;&lt;code&gt;&lt;span class="c1"&gt;// src/App.js&lt;/span&gt;
&lt;span class="kd"&gt;function&lt;/span&gt; &lt;span class="nf"&gt;App&lt;/span&gt;&lt;span class="p"&gt;()&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
  &lt;span class="k"&gt;return &lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;
    &lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="nx"&gt;div&lt;/span&gt; &lt;span class="nx"&gt;className&lt;/span&gt;&lt;span class="o"&gt;=&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;App&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="o"&gt;&amp;gt;&lt;/span&gt;
      &lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="nx"&gt;h2&lt;/span&gt;&lt;span class="o"&gt;&amp;gt;&lt;/span&gt;&lt;span class="nx"&gt;Enter&lt;/span&gt; &lt;span class="nx"&gt;Some&lt;/span&gt; &lt;span class="nx"&gt;Tags&lt;/span&gt; &lt;span class="p"&gt;...&lt;/span&gt;&lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="sr"&gt;/h2&lt;/span&gt;&lt;span class="err"&gt;&amp;gt;
&lt;/span&gt;    &lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="sr"&gt;/div&lt;/span&gt;&lt;span class="err"&gt;&amp;gt;
&lt;/span&gt;  &lt;span class="p"&gt;);&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;

&lt;span class="k"&gt;export&lt;/span&gt; &lt;span class="k"&gt;default&lt;/span&gt; &lt;span class="nx"&gt;App&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;


&lt;p&gt;And I am also goin to add these CSS styles in our &lt;strong&gt;src/index.js&lt;/strong&gt;&lt;br&gt;
&lt;/p&gt;
&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight css"&gt;&lt;code&gt;&lt;span class="o"&gt;*&lt;/span&gt;&lt;span class="p"&gt;{&lt;/span&gt;
    &lt;span class="nl"&gt;margin&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="m"&gt;0&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
    &lt;span class="nl"&gt;padding&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="m"&gt;0&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;
&lt;span class="nt"&gt;html&lt;/span&gt;&lt;span class="o"&gt;,&lt;/span&gt; &lt;span class="nt"&gt;body&lt;/span&gt;&lt;span class="p"&gt;{&lt;/span&gt;
    &lt;span class="nl"&gt;height&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="m"&gt;100%&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;
&lt;span class="nt"&gt;body&lt;/span&gt;&lt;span class="p"&gt;{&lt;/span&gt;
    &lt;span class="nl"&gt;display&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="n"&gt;flex&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
    &lt;span class="nl"&gt;justify-content&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="nb"&gt;center&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
    &lt;span class="nl"&gt;align-items&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="nb"&gt;center&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
    &lt;span class="nl"&gt;font-family&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="s2"&gt;'Courier New'&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="n"&gt;Courier&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="nb"&gt;monospace&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
    &lt;span class="nl"&gt;font-weight&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="nb"&gt;bold&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;

&lt;span class="nc"&gt;.tags-input-container&lt;/span&gt;&lt;span class="p"&gt;{&lt;/span&gt;
    &lt;span class="nl"&gt;border&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="m"&gt;2px&lt;/span&gt; &lt;span class="nb"&gt;solid&lt;/span&gt; &lt;span class="m"&gt;#000&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
    &lt;span class="nl"&gt;padding&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="m"&gt;.5em&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
    &lt;span class="nl"&gt;border-radius&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="m"&gt;3px&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
    &lt;span class="nl"&gt;width&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="n"&gt;min&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="m"&gt;80vw&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="m"&gt;600px&lt;/span&gt;&lt;span class="p"&gt;);&lt;/span&gt;
    &lt;span class="nl"&gt;margin-top&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="m"&gt;1em&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
    &lt;span class="nl"&gt;display&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="n"&gt;flex&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
    &lt;span class="nl"&gt;align-items&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="nb"&gt;center&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
    &lt;span class="nl"&gt;flex-wrap&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="n"&gt;wrap&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
    &lt;span class="py"&gt;gap&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="m"&gt;.5em&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;

&lt;span class="nc"&gt;.tag-item&lt;/span&gt;&lt;span class="p"&gt;{&lt;/span&gt;
    &lt;span class="nl"&gt;background-color&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="nb"&gt;rgb&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="m"&gt;218&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="m"&gt;216&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="m"&gt;216&lt;/span&gt;&lt;span class="p"&gt;);&lt;/span&gt;
    &lt;span class="nl"&gt;display&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="n"&gt;inline-block&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
    &lt;span class="nl"&gt;padding&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="m"&gt;.5em&lt;/span&gt; &lt;span class="m"&gt;.75em&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
    &lt;span class="nl"&gt;border-radius&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="m"&gt;20px&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;
&lt;span class="nc"&gt;.tag-item&lt;/span&gt; &lt;span class="nc"&gt;.close&lt;/span&gt;&lt;span class="p"&gt;{&lt;/span&gt;
    &lt;span class="nl"&gt;height&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="m"&gt;20px&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
    &lt;span class="nl"&gt;width&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="m"&gt;20px&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
    &lt;span class="nl"&gt;background-color&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="nb"&gt;rgb&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="m"&gt;48&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="m"&gt;48&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="m"&gt;48&lt;/span&gt;&lt;span class="p"&gt;);&lt;/span&gt;
    &lt;span class="nl"&gt;color&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="m"&gt;#fff&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
    &lt;span class="nl"&gt;border-radius&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="m"&gt;50%&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
    &lt;span class="nl"&gt;display&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="n"&gt;inline-flex&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
    &lt;span class="nl"&gt;justify-content&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="nb"&gt;center&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
    &lt;span class="nl"&gt;align-items&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="nb"&gt;center&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
    &lt;span class="nl"&gt;margin-left&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="m"&gt;.5em&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
    &lt;span class="nl"&gt;font-size&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="m"&gt;18px&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
    &lt;span class="nl"&gt;cursor&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="nb"&gt;pointer&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;

&lt;span class="nc"&gt;.tags-input&lt;/span&gt;&lt;span class="p"&gt;{&lt;/span&gt;
    &lt;span class="nl"&gt;flex-grow&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="m"&gt;1&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
    &lt;span class="nl"&gt;padding&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="m"&gt;.5em&lt;/span&gt; &lt;span class="m"&gt;0&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
    &lt;span class="nl"&gt;border&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="nb"&gt;none&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
    &lt;span class="nl"&gt;outline&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="nb"&gt;none&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;


&lt;p&gt;If you want better explanation of the CSS you can watch this video of mine.   &lt;iframe src="https://www.youtube.com/embed/l8Jd7Ub4yJE"&gt;
  &lt;/iframe&gt;
&lt;/p&gt;

&lt;p&gt;Okay now if we were to start our app by running &lt;code&gt;npm start&lt;/code&gt; it should look like this&lt;br&gt;
&lt;a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2F7thkpse0j5zpg9cnwqrn.png" class="article-body-image-wrapper"&gt;&lt;img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2F7thkpse0j5zpg9cnwqrn.png" alt="Basic react app" width="800" height="450"&gt;&lt;/a&gt;&lt;br&gt;
Alright now lets create a folder inside &lt;strong&gt;src&lt;/strong&gt; folder named &lt;strong&gt;components&lt;/strong&gt; inside that we are going to create a component file called &lt;strong&gt;TagsInput.js&lt;/strong&gt;&lt;br&gt;
&lt;/p&gt;
&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight javascript"&gt;&lt;code&gt;&lt;span class="c1"&gt;// src/components/TagsInput.js&lt;/span&gt;
&lt;span class="kd"&gt;function&lt;/span&gt; &lt;span class="nf"&gt;TagsInput&lt;/span&gt;&lt;span class="p"&gt;(){&lt;/span&gt;
    &lt;span class="k"&gt;return &lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;
        &lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="nx"&gt;div&lt;/span&gt; &lt;span class="nx"&gt;className&lt;/span&gt;&lt;span class="o"&gt;=&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;tags-input-container&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="o"&gt;&amp;gt;&lt;/span&gt;
            &lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="nx"&gt;div&lt;/span&gt; &lt;span class="nx"&gt;className&lt;/span&gt;&lt;span class="o"&gt;=&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;tag-item&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="o"&gt;&amp;gt;&lt;/span&gt;&lt;span class="p"&gt;{&lt;/span&gt;&lt;span class="cm"&gt;/* One hardcoded tag for test */&lt;/span&gt;&lt;span class="p"&gt;}&lt;/span&gt;
                &lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="nx"&gt;span&lt;/span&gt; &lt;span class="nx"&gt;className&lt;/span&gt;&lt;span class="o"&gt;=&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;text&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="o"&gt;&amp;gt;&lt;/span&gt;&lt;span class="nx"&gt;hello&lt;/span&gt;&lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="sr"&gt;/span&lt;/span&gt;&lt;span class="err"&gt;&amp;gt;
&lt;/span&gt;                &lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="nx"&gt;span&lt;/span&gt; &lt;span class="nx"&gt;className&lt;/span&gt;&lt;span class="o"&gt;=&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;close&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="o"&gt;&amp;gt;&amp;amp;&lt;/span&gt;&lt;span class="nx"&gt;times&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;&lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="sr"&gt;/span&lt;/span&gt;&lt;span class="err"&gt;&amp;gt;
&lt;/span&gt;            &lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="sr"&gt;/div&lt;/span&gt;&lt;span class="err"&gt;&amp;gt;
&lt;/span&gt;            &lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="nx"&gt;input&lt;/span&gt; &lt;span class="nx"&gt;type&lt;/span&gt;&lt;span class="o"&gt;=&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;text&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt; &lt;span class="nx"&gt;className&lt;/span&gt;&lt;span class="o"&gt;=&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;tags-input&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt; &lt;span class="nx"&gt;placeholder&lt;/span&gt;&lt;span class="o"&gt;=&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;Type somthing&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt; &lt;span class="o"&gt;/&amp;gt;&lt;/span&gt;
        &lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="sr"&gt;/div&lt;/span&gt;&lt;span class="err"&gt;&amp;gt;
&lt;/span&gt;    &lt;span class="p"&gt;)&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;

&lt;span class="k"&gt;export&lt;/span&gt; &lt;span class="k"&gt;default&lt;/span&gt; &lt;span class="nx"&gt;TagsInput&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;


&lt;p&gt;Now we can import and use in our &lt;code&gt;App.js&lt;/code&gt;&lt;br&gt;
&lt;/p&gt;
&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight javascript"&gt;&lt;code&gt;&lt;span class="c1"&gt;// src/App.js&lt;/span&gt;
&lt;span class="k"&gt;import&lt;/span&gt; &lt;span class="nx"&gt;TagsInput&lt;/span&gt; &lt;span class="k"&gt;from&lt;/span&gt; &lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;./components/TagsInput&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;

&lt;span class="kd"&gt;function&lt;/span&gt; &lt;span class="nf"&gt;App&lt;/span&gt;&lt;span class="p"&gt;()&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
  &lt;span class="k"&gt;return &lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;
    &lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="nx"&gt;div&lt;/span&gt; &lt;span class="nx"&gt;className&lt;/span&gt;&lt;span class="o"&gt;=&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;App&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="o"&gt;&amp;gt;&lt;/span&gt;
      &lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="nx"&gt;h2&lt;/span&gt;&lt;span class="o"&gt;&amp;gt;&lt;/span&gt;&lt;span class="nx"&gt;Enter&lt;/span&gt; &lt;span class="nx"&gt;Some&lt;/span&gt; &lt;span class="nx"&gt;Tags&lt;/span&gt; &lt;span class="p"&gt;...&lt;/span&gt;&lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="sr"&gt;/h2&lt;/span&gt;&lt;span class="err"&gt;&amp;gt;
&lt;/span&gt;      &lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="nx"&gt;TagsInput&lt;/span&gt; &lt;span class="o"&gt;/&amp;gt;&lt;/span&gt;
    &lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="sr"&gt;/div&lt;/span&gt;&lt;span class="err"&gt;&amp;gt;
&lt;/span&gt;  &lt;span class="p"&gt;);&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;

&lt;span class="k"&gt;export&lt;/span&gt; &lt;span class="k"&gt;default&lt;/span&gt; &lt;span class="nx"&gt;App&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;


&lt;p&gt;&lt;a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fkoo8azqt6x7jocwn3arq.png" class="article-body-image-wrapper"&gt;&lt;img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fkoo8azqt6x7jocwn3arq.png" alt="hard coded tag demo" width="800" height="450"&gt;&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;Great, but no instead of having a hardcoded tag like this, we want an array and we should loop over the array and show a tag for each element. So lets use &lt;strong&gt;useState&lt;/strong&gt; to do that&lt;br&gt;
&lt;/p&gt;
&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight javascript"&gt;&lt;code&gt;&lt;span class="c1"&gt;// src/components/TagsInput.js&lt;/span&gt;
&lt;span class="k"&gt;import&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt; &lt;span class="nx"&gt;useState&lt;/span&gt; &lt;span class="p"&gt;}&lt;/span&gt; &lt;span class="k"&gt;from&lt;/span&gt; &lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="s1"&gt;react&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt;

&lt;span class="kd"&gt;function&lt;/span&gt; &lt;span class="nf"&gt;TagsInput&lt;/span&gt;&lt;span class="p"&gt;(){&lt;/span&gt;
    &lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="p"&gt;[&lt;/span&gt;&lt;span class="nx"&gt;tags&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="nx"&gt;setTags&lt;/span&gt;&lt;span class="p"&gt;]&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="nf"&gt;useState&lt;/span&gt;&lt;span class="p"&gt;([&lt;/span&gt;
        &lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;HTML&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;CSS&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;JavaScript&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;
    &lt;span class="p"&gt;])&lt;/span&gt;
    &lt;span class="k"&gt;return &lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;
        &lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="nx"&gt;div&lt;/span&gt; &lt;span class="nx"&gt;className&lt;/span&gt;&lt;span class="o"&gt;=&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;tags-input-container&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="o"&gt;&amp;gt;&lt;/span&gt;
            &lt;span class="p"&gt;{&lt;/span&gt; &lt;span class="nx"&gt;tags&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;map&lt;/span&gt;&lt;span class="p"&gt;((&lt;/span&gt;&lt;span class="nx"&gt;tag&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="nx"&gt;index&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="o"&gt;=&amp;gt;&lt;/span&gt; &lt;span class="p"&gt;(&lt;/span&gt;
                &lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="nx"&gt;div&lt;/span&gt; &lt;span class="nx"&gt;className&lt;/span&gt;&lt;span class="o"&gt;=&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;tag-item&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt; &lt;span class="nx"&gt;key&lt;/span&gt;&lt;span class="o"&gt;=&lt;/span&gt;&lt;span class="p"&gt;{&lt;/span&gt;&lt;span class="nx"&gt;index&lt;/span&gt;&lt;span class="p"&gt;}&lt;/span&gt;&lt;span class="o"&gt;&amp;gt;&lt;/span&gt;
                    &lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="nx"&gt;span&lt;/span&gt; &lt;span class="nx"&gt;className&lt;/span&gt;&lt;span class="o"&gt;=&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;text&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="o"&gt;&amp;gt;&lt;/span&gt;&lt;span class="p"&gt;{&lt;/span&gt;&lt;span class="nx"&gt;tag&lt;/span&gt;&lt;span class="p"&gt;}&lt;/span&gt;&lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="sr"&gt;/span&lt;/span&gt;&lt;span class="err"&gt;&amp;gt;
&lt;/span&gt;                    &lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="nx"&gt;span&lt;/span&gt; &lt;span class="nx"&gt;className&lt;/span&gt;&lt;span class="o"&gt;=&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;close&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="o"&gt;&amp;gt;&amp;amp;&lt;/span&gt;&lt;span class="nx"&gt;times&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;&lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="sr"&gt;/span&lt;/span&gt;&lt;span class="err"&gt;&amp;gt;
&lt;/span&gt;                &lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="sr"&gt;/div&lt;/span&gt;&lt;span class="err"&gt;&amp;gt;
&lt;/span&gt;            &lt;span class="p"&gt;))&lt;/span&gt; &lt;span class="p"&gt;}&lt;/span&gt;
            &lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="nx"&gt;input&lt;/span&gt; &lt;span class="nx"&gt;type&lt;/span&gt;&lt;span class="o"&gt;=&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;text&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt; &lt;span class="nx"&gt;className&lt;/span&gt;&lt;span class="o"&gt;=&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;tags-input&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt; &lt;span class="nx"&gt;placeholder&lt;/span&gt;&lt;span class="o"&gt;=&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;Type somthing&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt; &lt;span class="o"&gt;/&amp;gt;&lt;/span&gt;
        &lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="sr"&gt;/div&lt;/span&gt;&lt;span class="err"&gt;&amp;gt;
&lt;/span&gt;    &lt;span class="p"&gt;)&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;

&lt;span class="k"&gt;export&lt;/span&gt; &lt;span class="k"&gt;default&lt;/span&gt; &lt;span class="nx"&gt;TagsInput&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;


&lt;p&gt;&lt;a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2F008ififz0bat53doxs3c.png" class="article-body-image-wrapper"&gt;&lt;img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2F008ififz0bat53doxs3c.png" alt="React dynamically rendered tags using useState and map" width="800" height="450"&gt;&lt;/a&gt;&lt;br&gt;
Okay now by default our array should be empty and when we type something in our input and press &lt;strong&gt;Enter&lt;/strong&gt; a new item should be added in our &lt;strong&gt;tags&lt;/strong&gt; state array. So lets create a function for that and add &lt;strong&gt;onKeyDown&lt;/strong&gt; event listener to our input.&lt;br&gt;
&lt;/p&gt;
&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight javascript"&gt;&lt;code&gt;&lt;span class="c1"&gt;// src/components/TagsInput.js&lt;/span&gt;
&lt;span class="k"&gt;import&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt; &lt;span class="nx"&gt;useState&lt;/span&gt; &lt;span class="p"&gt;}&lt;/span&gt; &lt;span class="k"&gt;from&lt;/span&gt; &lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="s1"&gt;react&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt;

&lt;span class="kd"&gt;function&lt;/span&gt; &lt;span class="nf"&gt;TagsInput&lt;/span&gt;&lt;span class="p"&gt;(){&lt;/span&gt;
    &lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="p"&gt;[&lt;/span&gt;&lt;span class="nx"&gt;tags&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="nx"&gt;setTags&lt;/span&gt;&lt;span class="p"&gt;]&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="nf"&gt;useState&lt;/span&gt;&lt;span class="p"&gt;([])&lt;/span&gt;

    &lt;span class="kd"&gt;function&lt;/span&gt; &lt;span class="nf"&gt;handleKeyDown&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;e&lt;/span&gt;&lt;span class="p"&gt;){&lt;/span&gt;
        &lt;span class="c1"&gt;// If user did not press enter key, return&lt;/span&gt;
        &lt;span class="k"&gt;if&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;e&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;key&lt;/span&gt; &lt;span class="o"&gt;!==&lt;/span&gt; &lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="s1"&gt;Enter&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="k"&gt;return&lt;/span&gt;
        &lt;span class="c1"&gt;// Get the value of the input&lt;/span&gt;
        &lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;value&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="nx"&gt;e&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;target&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;value&lt;/span&gt;
        &lt;span class="c1"&gt;// If the value is empty, return&lt;/span&gt;
        &lt;span class="k"&gt;if&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="o"&gt;!&lt;/span&gt;&lt;span class="nx"&gt;value&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;trim&lt;/span&gt;&lt;span class="p"&gt;())&lt;/span&gt; &lt;span class="k"&gt;return&lt;/span&gt;
        &lt;span class="c1"&gt;// Add the value to the tags array&lt;/span&gt;
        &lt;span class="nf"&gt;setTags&lt;/span&gt;&lt;span class="p"&gt;([...&lt;/span&gt;&lt;span class="nx"&gt;tags&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="nx"&gt;value&lt;/span&gt;&lt;span class="p"&gt;])&lt;/span&gt;
        &lt;span class="c1"&gt;// Clear the input&lt;/span&gt;
        &lt;span class="nx"&gt;e&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;target&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;value&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="dl"&gt;''&lt;/span&gt;
    &lt;span class="p"&gt;}&lt;/span&gt;

    &lt;span class="k"&gt;return &lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;
        &lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="nx"&gt;div&lt;/span&gt; &lt;span class="nx"&gt;className&lt;/span&gt;&lt;span class="o"&gt;=&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;tags-input-container&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="o"&gt;&amp;gt;&lt;/span&gt;
            &lt;span class="p"&gt;{&lt;/span&gt; &lt;span class="nx"&gt;tags&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;map&lt;/span&gt;&lt;span class="p"&gt;((&lt;/span&gt;&lt;span class="nx"&gt;tag&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="nx"&gt;index&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="o"&gt;=&amp;gt;&lt;/span&gt; &lt;span class="p"&gt;(&lt;/span&gt;
                &lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="nx"&gt;div&lt;/span&gt; &lt;span class="nx"&gt;className&lt;/span&gt;&lt;span class="o"&gt;=&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;tag-item&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt; &lt;span class="nx"&gt;key&lt;/span&gt;&lt;span class="o"&gt;=&lt;/span&gt;&lt;span class="p"&gt;{&lt;/span&gt;&lt;span class="nx"&gt;index&lt;/span&gt;&lt;span class="p"&gt;}&lt;/span&gt;&lt;span class="o"&gt;&amp;gt;&lt;/span&gt;
                    &lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="nx"&gt;span&lt;/span&gt; &lt;span class="nx"&gt;className&lt;/span&gt;&lt;span class="o"&gt;=&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;text&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="o"&gt;&amp;gt;&lt;/span&gt;&lt;span class="p"&gt;{&lt;/span&gt;&lt;span class="nx"&gt;tag&lt;/span&gt;&lt;span class="p"&gt;}&lt;/span&gt;&lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="sr"&gt;/span&lt;/span&gt;&lt;span class="err"&gt;&amp;gt;
&lt;/span&gt;                    &lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="nx"&gt;span&lt;/span&gt; &lt;span class="nx"&gt;className&lt;/span&gt;&lt;span class="o"&gt;=&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;close&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="o"&gt;&amp;gt;&amp;amp;&lt;/span&gt;&lt;span class="nx"&gt;times&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;&lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="sr"&gt;/span&lt;/span&gt;&lt;span class="err"&gt;&amp;gt;
&lt;/span&gt;                &lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="sr"&gt;/div&lt;/span&gt;&lt;span class="err"&gt;&amp;gt;
&lt;/span&gt;            &lt;span class="p"&gt;))&lt;/span&gt; &lt;span class="p"&gt;}&lt;/span&gt;
            &lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="nx"&gt;input&lt;/span&gt; &lt;span class="nx"&gt;onKeyDown&lt;/span&gt;&lt;span class="o"&gt;=&lt;/span&gt;&lt;span class="p"&gt;{&lt;/span&gt;&lt;span class="nx"&gt;handleKeyDown&lt;/span&gt;&lt;span class="p"&gt;}&lt;/span&gt; &lt;span class="nx"&gt;type&lt;/span&gt;&lt;span class="o"&gt;=&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;text&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt; &lt;span class="nx"&gt;className&lt;/span&gt;&lt;span class="o"&gt;=&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;tags-input&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt; &lt;span class="nx"&gt;placeholder&lt;/span&gt;&lt;span class="o"&gt;=&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;Type somthing&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt; &lt;span class="o"&gt;/&amp;gt;&lt;/span&gt;
        &lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="sr"&gt;/div&lt;/span&gt;&lt;span class="err"&gt;&amp;gt;
&lt;/span&gt;    &lt;span class="p"&gt;)&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;

&lt;span class="k"&gt;export&lt;/span&gt; &lt;span class="k"&gt;default&lt;/span&gt; &lt;span class="nx"&gt;TagsInput&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;


&lt;p&gt;&lt;a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fv9258fkuytm7s6duzcws.png" class="article-body-image-wrapper"&gt;&lt;img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fv9258fkuytm7s6duzcws.png" alt="event handling and updating state in React JS" width="800" height="450"&gt;&lt;/a&gt;&lt;br&gt;
And now finally when even user clicks on the &lt;br&gt;
&lt;strong&gt;close(x)&lt;/strong&gt;  button of a tag the tag should be removed from our &lt;strong&gt;tags&lt;/strong&gt; array. So lets create a function that take a index as its argument and removes the item at that index from our &lt;strong&gt;tags&lt;/strong&gt; array. And add &lt;strong&gt;onClick&lt;/strong&gt; listener to the close buttons.&lt;br&gt;
&lt;/p&gt;
&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight javascript"&gt;&lt;code&gt;&lt;span class="c1"&gt;// src/components/TagsInput.js&lt;/span&gt;
&lt;span class="k"&gt;import&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt; &lt;span class="nx"&gt;useState&lt;/span&gt; &lt;span class="p"&gt;}&lt;/span&gt; &lt;span class="k"&gt;from&lt;/span&gt; &lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="s1"&gt;react&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt;

&lt;span class="kd"&gt;function&lt;/span&gt; &lt;span class="nf"&gt;TagsInput&lt;/span&gt;&lt;span class="p"&gt;(){&lt;/span&gt;
    &lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="p"&gt;[&lt;/span&gt;&lt;span class="nx"&gt;tags&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="nx"&gt;setTags&lt;/span&gt;&lt;span class="p"&gt;]&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="nf"&gt;useState&lt;/span&gt;&lt;span class="p"&gt;([])&lt;/span&gt;

    &lt;span class="kd"&gt;function&lt;/span&gt; &lt;span class="nf"&gt;handleKeyDown&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;e&lt;/span&gt;&lt;span class="p"&gt;){&lt;/span&gt;
        &lt;span class="k"&gt;if&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;e&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;key&lt;/span&gt; &lt;span class="o"&gt;!==&lt;/span&gt; &lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="s1"&gt;Enter&lt;/span&gt;&lt;span class="dl"&gt;'&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="k"&gt;return&lt;/span&gt;
        &lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;value&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="nx"&gt;e&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;target&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;value&lt;/span&gt;
        &lt;span class="k"&gt;if&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="o"&gt;!&lt;/span&gt;&lt;span class="nx"&gt;value&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;trim&lt;/span&gt;&lt;span class="p"&gt;())&lt;/span&gt; &lt;span class="k"&gt;return&lt;/span&gt;
        &lt;span class="nf"&gt;setTags&lt;/span&gt;&lt;span class="p"&gt;([...&lt;/span&gt;&lt;span class="nx"&gt;tags&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="nx"&gt;value&lt;/span&gt;&lt;span class="p"&gt;])&lt;/span&gt;
        &lt;span class="nx"&gt;e&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;target&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;value&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="dl"&gt;''&lt;/span&gt;
    &lt;span class="p"&gt;}&lt;/span&gt;

    &lt;span class="kd"&gt;function&lt;/span&gt; &lt;span class="nf"&gt;removeTag&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;index&lt;/span&gt;&lt;span class="p"&gt;){&lt;/span&gt;
        &lt;span class="nf"&gt;setTags&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;tags&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;filter&lt;/span&gt;&lt;span class="p"&gt;((&lt;/span&gt;&lt;span class="nx"&gt;el&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="nx"&gt;i&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="o"&gt;=&amp;gt;&lt;/span&gt; &lt;span class="nx"&gt;i&lt;/span&gt; &lt;span class="o"&gt;!==&lt;/span&gt; &lt;span class="nx"&gt;index&lt;/span&gt;&lt;span class="p"&gt;))&lt;/span&gt;
    &lt;span class="p"&gt;}&lt;/span&gt;

    &lt;span class="k"&gt;return &lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;
        &lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="nx"&gt;div&lt;/span&gt; &lt;span class="nx"&gt;className&lt;/span&gt;&lt;span class="o"&gt;=&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;tags-input-container&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="o"&gt;&amp;gt;&lt;/span&gt;
            &lt;span class="p"&gt;{&lt;/span&gt; &lt;span class="nx"&gt;tags&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nf"&gt;map&lt;/span&gt;&lt;span class="p"&gt;((&lt;/span&gt;&lt;span class="nx"&gt;tag&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="nx"&gt;index&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="o"&gt;=&amp;gt;&lt;/span&gt; &lt;span class="p"&gt;(&lt;/span&gt;
                &lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="nx"&gt;div&lt;/span&gt; &lt;span class="nx"&gt;className&lt;/span&gt;&lt;span class="o"&gt;=&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;tag-item&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt; &lt;span class="nx"&gt;key&lt;/span&gt;&lt;span class="o"&gt;=&lt;/span&gt;&lt;span class="p"&gt;{&lt;/span&gt;&lt;span class="nx"&gt;index&lt;/span&gt;&lt;span class="p"&gt;}&lt;/span&gt;&lt;span class="o"&gt;&amp;gt;&lt;/span&gt;
                    &lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="nx"&gt;span&lt;/span&gt; &lt;span class="nx"&gt;className&lt;/span&gt;&lt;span class="o"&gt;=&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;text&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="o"&gt;&amp;gt;&lt;/span&gt;&lt;span class="p"&gt;{&lt;/span&gt;&lt;span class="nx"&gt;tag&lt;/span&gt;&lt;span class="p"&gt;}&lt;/span&gt;&lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="sr"&gt;/span&lt;/span&gt;&lt;span class="err"&gt;&amp;gt;
&lt;/span&gt;                    &lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="nx"&gt;span&lt;/span&gt; &lt;span class="nx"&gt;className&lt;/span&gt;&lt;span class="o"&gt;=&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;close&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt; &lt;span class="nx"&gt;onClick&lt;/span&gt;&lt;span class="o"&gt;=&lt;/span&gt;&lt;span class="p"&gt;{()&lt;/span&gt; &lt;span class="o"&gt;=&amp;gt;&lt;/span&gt; &lt;span class="nf"&gt;removeTag&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;index&lt;/span&gt;&lt;span class="p"&gt;)}&lt;/span&gt;&lt;span class="o"&gt;&amp;gt;&amp;amp;&lt;/span&gt;&lt;span class="nx"&gt;times&lt;/span&gt;&lt;span class="p"&gt;;&lt;/span&gt;&lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="sr"&gt;/span&lt;/span&gt;&lt;span class="err"&gt;&amp;gt;
&lt;/span&gt;                &lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="sr"&gt;/div&lt;/span&gt;&lt;span class="err"&gt;&amp;gt;
&lt;/span&gt;            &lt;span class="p"&gt;))&lt;/span&gt; &lt;span class="p"&gt;}&lt;/span&gt;
            &lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="nx"&gt;input&lt;/span&gt; &lt;span class="nx"&gt;onKeyDown&lt;/span&gt;&lt;span class="o"&gt;=&lt;/span&gt;&lt;span class="p"&gt;{&lt;/span&gt;&lt;span class="nx"&gt;handleKeyDown&lt;/span&gt;&lt;span class="p"&gt;}&lt;/span&gt; &lt;span class="nx"&gt;type&lt;/span&gt;&lt;span class="o"&gt;=&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;text&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt; &lt;span class="nx"&gt;className&lt;/span&gt;&lt;span class="o"&gt;=&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;tags-input&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt; &lt;span class="nx"&gt;placeholder&lt;/span&gt;&lt;span class="o"&gt;=&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;Type somthing&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt; &lt;span class="o"&gt;/&amp;gt;&lt;/span&gt;
        &lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="sr"&gt;/div&lt;/span&gt;&lt;span class="err"&gt;&amp;gt;
&lt;/span&gt;    &lt;span class="p"&gt;)&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;

&lt;span class="k"&gt;export&lt;/span&gt; &lt;span class="k"&gt;default&lt;/span&gt; &lt;span class="nx"&gt;TagsInput&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;


&lt;p&gt;&lt;a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2F4esttzf3f09i6oys3awb.png" class="article-body-image-wrapper"&gt;&lt;img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2F4esttzf3f09i6oys3awb.png" alt="React JS Add Tags Input Finished Demo" width="800" height="450"&gt;&lt;/a&gt;&lt;br&gt;
And that's all we have successfully create a tags input using React and Bit of JavaScript.&lt;/p&gt;

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