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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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Detecting emoji that Windows 10 can't draw, and swapping in images without breaking copy

Detecting emoji that Windows 10 can't draw, and swapping in images without breaking copy

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5 min read
I built a free Chrome Extension to extract any website's Brand Kit (Colors, Fonts, CSS) & Client Onboarding Brief

I built a free Chrome Extension to extract any website's Brand Kit (Colors, Fonts, CSS) & Client Onboarding Brief

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2 min read
Your preventDefault() Did Nothing, and the Only Warning Went to a Phone You Do Not Have

Your preventDefault() Did Nothing, and the Only Warning Went to a Phone You Do Not Have

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3 min read
Anonymizing FIX logs without breaking them: BodyLength, CheckSum and the five traps

Anonymizing FIX logs without breaking them: BodyLength, CheckSum and the five traps

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2 min read
My Code Works. I Have No Idea Why.

My Code Works. I Have No Idea Why.

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1 min read
Stop adapting axios to TanStack Query: a fetch client built for queryFn

Stop adapting axios to TanStack Query: a fetch client built for queryFn

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2 min read
Format JSON in the Browser: The Numbers That Change When You Reformat

Format JSON in the Browser: The Numbers That Change When You Reformat

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6 min read
The Mathematics of IPv4 Subnetting: Bitwise Operations, CIDR Masking, and Fast Address Space Routing

The Mathematics of IPv4 Subnetting: Bitwise Operations, CIDR Masking, and Fast Address Space Routing

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6 min read
Your PDF Converter Should Not Need Your Files

Your PDF Converter Should Not Need Your Files

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3 min read
PDF.js Deep Dive from Demo 2: getDocument

PDF.js Deep Dive from Demo 2: getDocument

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9 min read
We Measured 1,500 Lines of Terminal Bloat Burning $0.20 Per Prompt in Cursor. Here's How We Stripped 97% of It in 2.5ms

We Measured 1,500 Lines of Terminal Bloat Burning $0.20 Per Prompt in Cursor. Here's How We Stripped 97% of It in 2.5ms

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6 min read
I Built 40 Free Online Tools That Run Entirely in the Browser — No Server, No Uploads

I Built 40 Free Online Tools That Run Entirely in the Browser — No Server, No Uploads

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2 min read
Switching an OpenAI Realtime voice agent to ElevenLabs: the 2-line change, the real cost per call, and the WebRTC catch

Switching an OpenAI Realtime voice agent to ElevenLabs: the 2-line change, the real cost per call, and the WebRTC catch

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5 min read
Converting SRT to WebVTT: the cases a one-line regex gets wrong

Converting SRT to WebVTT: the cases a one-line regex gets wrong

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4 min read
The same snippet in Bun and in a browser

The same snippet in Bun and in a browser

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3 min read
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