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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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Instant Data Scraper Chrome Extension: A Practical Guide to What It Can—and Can’t—Do

Instant Data Scraper Chrome Extension: A Practical Guide to What It Can—and Can’t—Do

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5 min read
"Building a stride calculator with plain JavaScript"

"Building a stride calculator with plain JavaScript"

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3 min read
Create a ZIP in the Browser: The Deflate Ratios and CRC-32 Checksums You Can Check

Create a ZIP in the Browser: The Deflate Ratios and CRC-32 Checksums You Can Check

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4 min read
Monte Carlo for casino bonuses: the expected value of free spins hides a 90% chance of nothing

Monte Carlo for casino bonuses: the expected value of free spins hides a 90% chance of nothing

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4 min read
How to Build a Personality Test in JavaScript: Scoring, Neutral Answers and Unit Tests

How to Build a Personality Test in JavaScript: Scoring, Neutral Answers and Unit Tests

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6 min read
I built a debt snowball vs avalanche calculator in 3 KB of vanilla JS (and its default example shows no difference)

I built a debt snowball vs avalanche calculator in 3 KB of vanilla JS (and its default example shows no difference)

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4 min read
Your product configurator should price server-side, not in JavaScript

Your product configurator should price server-side, not in JavaScript

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4 min read
Our licence key is 60 bits in three groups of four, and it is unbiased only because the alphabet has 32 letters

Our licence key is 60 bits in three groups of four, and it is unbiased only because the alphabet has 32 letters

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5 min read
I couldn't get a straight answer on which mic to buy, so I built a tool to find one

I couldn't get a straight answer on which mic to buy, so I built a tool to find one

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5 min read
EADDRINUSE again? This tool tells you who owns the port before you kill anything

EADDRINUSE again? This tool tells you who owns the port before you kill anything

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5 min read
I got tired of simple browser caches, so I built one in Rust

I got tired of simple browser caches, so I built one in Rust

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2 min read
A small ffprobe check for which videos not to re-encode, and what it printed on five public clips

A small ffprobe check for which videos not to re-encode, and what it printed on five public clips

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4 min read
I built a terminal-style GitHub profile generator (animated, free, no install)

I built a terminal-style GitHub profile generator (animated, free, no install)

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3 min read
I thought most of a pull request was noise. I measured 1,000 of them. I was wrong.

I thought most of a pull request was noise. I measured 1,000 of them. I was wrong.

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2 min read
How we built a 3.4 KB ad script with 0.03 CLS using Cloudflare Workers

How we built a 3.4 KB ad script with 0.03 CLS using Cloudflare Workers

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2 min read
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