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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!

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I built 81 free browser-based tools in vanilla JS — no login, no server, no BS

I built 81 free browser-based tools in vanilla JS — no login, no server, no BS

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2 min read
Dear Okroshka: a love letter to a cold soup and a landing page that switches sides with zero JavaScript

Frontend Challenge Perfect Landing Submission 🍲🥧

Dear Okroshka: a love letter to a cold soup and a landing page that switches sides with zero JavaScript

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3 min read
How I Built a Free Twitch Emote Resizer Tool

How I Built a Free Twitch Emote Resizer Tool

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1 min read
What is Content Security Policy (CSP)?

What is Content Security Policy (CSP)?

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2 min read
You've been wrapping `new URL()` in try/catch. `URL.parse()` does it natively.

You've been wrapping `new URL()` in try/catch. `URL.parse()` does it natively.

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5 min read
PISCA: I turned an Andean breakfast soup into an interactive landscape

Frontend Challenge Perfect Landing Submission 🍲🥧

PISCA: I turned an Andean breakfast soup into an interactive landscape

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4 min read
I built a webhook testing API in one day and listed it on RapidAPI for free

I built a webhook testing API in one day and listed it on RapidAPI for free

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2 min read
Your scraper probably doesn't need a browser. It needs the right request.

Your scraper probably doesn't need a browser. It needs the right request.

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3 min read
Building a Zero-Dependency Barcode Scanner with the Web Barcode Detection API

Building a Zero-Dependency Barcode Scanner with the Web Barcode Detection API

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3 min read
Converting a JavaScript-Rendered Web Page to PDF

Converting a JavaScript-Rendered Web Page to PDF

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4 min read
Why Your Vibe-Coded Website May Never Rank on Google (2026)

Why Your Vibe-Coded Website May Never Rank on Google (2026)

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7 min read
React Virtual DOM Explained: Why React Is So Fast

React Virtual DOM Explained: Why React Is So Fast

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3 min read
I Built a Unit Converter in Pure Vanilla JS — 7 Categories, 70+ Units, 165 Tests, Zero Dependencies

I Built a Unit Converter in Pure Vanilla JS — 7 Categories, 70+ Units, 165 Tests, Zero Dependencies

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3 min read
I Built a Browser-Only Timestamp Converter — Epoch ↔ Date, 30+ Timezones, DST-Aware, 124 Tests

I Built a Browser-Only Timestamp Converter — Epoch ↔ Date, 30+ Timezones, DST-Aware, 124 Tests

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3 min read
【互動藝術 DIY】用 p5.js 做一塊會呼吸的粒子背景(無程式背景可)

【互動藝術 DIY】用 p5.js 做一塊會呼吸的粒子背景(無程式背景可)

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1 min read
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