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JavaScript

Once relegated to the browser as one of the 3 core technologies of the web, JavaScript can now be found almost anywhere you find code. JavaScript developers move fast and push software development forward; they can be as opinionated as the frameworks they use, so let's keep it clean here and make it a place to learn from each other!

Posts

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The worked example that disagreed with its own calculator

The worked example that disagreed with its own calculator

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5 min read
How to export WhatsApp Web group members and chats to CSV (without the API)

How to export WhatsApp Web group members and chats to CSV (without the API)

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4 min read
I Built 10 JavaScript Developer Tools in One Place — Here's How

I Built 10 JavaScript Developer Tools in One Place — Here's How

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2 min read
Next.js App Router Caching: What Actually Gets Cached (and What Doesn't)

Next.js App Router Caching: What Actually Gets Cached (and What Doesn't)

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6 min read
Destructuring in JavaScript

Destructuring in JavaScript

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7 min read
Why I built SVOCS: Svelte-first docs in 2026

Why I built SVOCS: Svelte-first docs in 2026

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3 min read
I Built a Free Sleep Calculator in Pure HTML/CSS/JS — No Frameworks, No Libraries, 98 Desktop Speed

I Built a Free Sleep Calculator in Pure HTML/CSS/JS — No Frameworks, No Libraries, 98 Desktop Speed

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1 min read
What if your UI had a memory?

What if your UI had a memory?

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1 min read
Why generating random CPFs in your tests is wrong (and how I fixed it with a zero-dependency lib)

Why generating random CPFs in your tests is wrong (and how I fixed it with a zero-dependency lib)

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4 min read
Unix Timestamp Cheat Sheet: Convert, Read, and Debug Like a Pro

Unix Timestamp Cheat Sheet: Convert, Read, and Debug Like a Pro

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4 min read
Fixing INP: Field Notes on Interaction to Next Paint in a React App

Fixing INP: Field Notes on Interaction to Next Paint in a React App

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4 min read
AI Can Write Your React Code. It Still Can't Tell You Why It's Wrong.

AI Can Write Your React Code. It Still Can't Tell You Why It's Wrong.

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3 min read
Node.js Event Loop Explained: The Secret Behind Its Speed

Node.js Event Loop Explained: The Secret Behind Its Speed

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5 min read
CĂłmo solucionar el bucle infinito en `useEffect` con objetos y arrays

CĂłmo solucionar el bucle infinito en `useEffect` con objetos y arrays

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2 min read
React Performance Checklist

React Performance Checklist

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3 min read
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