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    <title>DEV Community: itwillwork</title>
    <description>The latest articles on DEV Community by itwillwork (@itwillwork).</description>
    <link>https://dev.to/itwillwork</link>
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      <title>Understand React render better</title>
      <dc:creator>itwillwork</dc:creator>
      <pubDate>Sat, 17 Nov 2018 13:22:45 +0000</pubDate>
      <link>https://dev.to/itwillwork/understand-react-better-4g50</link>
      <guid>https://dev.to/itwillwork/understand-react-better-4g50</guid>
      <description>&lt;p&gt;To answer the question. &lt;strong&gt;Why did the rendering happen?&lt;/strong&gt;&lt;/p&gt;

&lt;p&gt;&lt;a href="https://res.cloudinary.com/practicaldev/image/fetch/s--I9eQDnp2--/c_limit%2Cf_auto%2Cfl_progressive%2Cq_auto%2Cw_880/https://user-images.githubusercontent.com/15855766/47255109-5e687900-d474-11e8-86b1-38d732483959.png" class="article-body-image-wrapper"&gt;&lt;img width="564" alt="example" src="https://res.cloudinary.com/practicaldev/image/fetch/s--I9eQDnp2--/c_limit%2Cf_auto%2Cfl_progressive%2Cq_auto%2Cw_880/https://user-images.githubusercontent.com/15855766/47255109-5e687900-d474-11e8-86b1-38d732483959.png"&gt;&lt;/a&gt;&lt;/p&gt;

&lt;h2&gt;
  
  
  Advantages
&lt;/h2&gt;

&lt;ul&gt;
&lt;li&gt;&lt;p&gt;used directly for one component, therefore it works very fast&lt;/p&gt;&lt;/li&gt;
&lt;li&gt;&lt;p&gt;for all versions of React from 0.13.0 to 16.0.0 &lt;/p&gt;&lt;/li&gt;
&lt;li&gt;&lt;p&gt;zero dependencies&lt;/p&gt;&lt;/li&gt;
&lt;/ul&gt;

&lt;h2&gt;
  
  
  Install
&lt;/h2&gt;



&lt;div class="highlight"&gt;&lt;pre class="highlight plaintext"&gt;&lt;code&gt;npm install clear-render --save-dev
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;



&lt;p&gt;You can set globally, to be used in all their projects without having to install each.&lt;/p&gt;

&lt;h2&gt;
  
  
  Usage
&lt;/h2&gt;

&lt;p&gt;Wrap the component for which you want to watch. And yet!&lt;br&gt;
&lt;/p&gt;

&lt;div class="highlight"&gt;&lt;pre class="highlight javascript"&gt;&lt;code&gt;&lt;span class="k"&gt;import&lt;/span&gt; &lt;span class="nx"&gt;clearRender&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;clear-render&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="nd"&gt;clearRender&lt;/span&gt;
&lt;span class="kd"&gt;class&lt;/span&gt; &lt;span class="nx"&gt;SimpleComponent&lt;/span&gt; &lt;span class="kd"&gt;extends&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;Component&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;or&lt;br&gt;
&lt;/p&gt;

&lt;div class="highlight"&gt;&lt;pre class="highlight javascript"&gt;&lt;code&gt;&lt;span class="k"&gt;import&lt;/span&gt; &lt;span class="nx"&gt;clearRender&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;clear-render&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;OriginalSimpleComponent&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;./SimpleComponent&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;SimpleComponent&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="nx"&gt;clearRender&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;OriginalSimpleComponent&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;SimpleComponent&lt;/span&gt; &lt;span class="p"&gt;{...&lt;/span&gt;&lt;span class="nx"&gt;props&lt;/span&gt;&lt;span class="p"&gt;}&lt;/span&gt; &lt;span class="sr"&gt;/&lt;/span&gt;&lt;span class="err"&gt;&amp;gt;
&lt;/span&gt;&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;



&lt;h2&gt;
  
  
  Usage for CodePen and JSBin as UMD module
&lt;/h2&gt;

&lt;p&gt;in html area&lt;br&gt;
&lt;/p&gt;

&lt;div class="highlight"&gt;&lt;pre class="highlight javascript"&gt;&lt;code&gt;&lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="nx"&gt;script&lt;/span&gt; &lt;span class="nx"&gt;src&lt;/span&gt;&lt;span class="o"&gt;=&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="s2"&gt;https://unpkg.com/clear-render@latest/build/umd/index.js&lt;/span&gt;&lt;span class="dl"&gt;"&lt;/span&gt;&lt;span class="o"&gt;&amp;gt;&amp;lt;&lt;/span&gt;&lt;span class="sr"&gt;/script&lt;/span&gt;&lt;span class="err"&gt;&amp;gt;
&lt;/span&gt;&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;



&lt;p&gt;in js area use &lt;code&gt;clearRender&lt;/code&gt; from global scope&lt;br&gt;
&lt;/p&gt;

&lt;div class="highlight"&gt;&lt;pre class="highlight javascript"&gt;&lt;code&gt;&lt;span class="p"&gt;@&lt;/span&gt;&lt;span class="nd"&gt;clearRender&lt;/span&gt;
&lt;span class="kd"&gt;class&lt;/span&gt; &lt;span class="nx"&gt;SimpleComponent&lt;/span&gt; &lt;span class="kd"&gt;extends&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;Component&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;



</description>
      <category>react</category>
      <category>frontend</category>
      <category>perfomance</category>
      <category>devtool</category>
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