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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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A soft breach and a hard breach are different failures

A soft breach and a hard breach are different failures

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4 min read
Multiple funded accounts are one position, not several

Multiple funded accounts are one position, not several

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4 min read
Weekend holding: what an overnight gap does to a funded account

Weekend holding: what an overnight gap does to a funded account

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4 min read
What Is Event Loop Lag in Node.js? How to Measure It (Part 1)

What Is Event Loop Lag in Node.js? How to Measure It (Part 1)

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6 min read
I measure session length with a WebSocket that carries no data

I measure session length with a WebSocket that carries no data

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5 min read
Your package.json Says What You Asked For. Only the Lockfile Says What You Got.

Your package.json Says What You Asked For. Only the Lockfile Says What You Got.

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3 min read
Event-driven architecture in Node.js: pub/sub with NATS, Kafka and Redis — and when an event is not enough

Event-driven architecture in Node.js: pub/sub with NATS, Kafka and Redis — and when an event is not enough

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13 min read
Core Web Vitals & Frontend Performance

Core Web Vitals & Frontend Performance

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8 min read
Sandbox Escapes in vm2 3.11.7: Six Boundary Failures in One Patch

Sandbox Escapes in vm2 3.11.7: Six Boundary Failures in One Patch

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5 min read
Why Your Full-Stack App Breaks in Production (and How Nginx Fixes It)

Why Your Full-Stack App Breaks in Production (and How Nginx Fixes It)

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4 min read
Randomness in JavaScript — Why Math.random() Isn't Random Enough

Randomness in JavaScript — Why Math.random() Isn't Random Enough

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2 min read
How to Fix Common JSON Syntax Errors (Incl. AI Output)

How to Fix Common JSON Syntax Errors (Incl. AI Output)

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3 min read
CVE-2026-94545 Explained: What Happens When an OG-Image Generator Forgets to Escape

CVE-2026-94545 Explained: What Happens When an OG-Image Generator Forgets to Escape

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5 min read
Saving leads and handling 429 errors in a Node.js Telegram bot with grammY

Saving leads and handling 429 errors in a Node.js Telegram bot with grammY

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7 min read
My deploy succeeded, and my site started lying about your photos

My deploy succeeded, and my site started lying about your photos

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4 min read
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