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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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How React Actually Works Under the Hood (And Why Your Mental Model Might Be Wrong)

Relates the universal rookie state-logging mistake

How React Actually Works Under the Hood (And Why Your Mental Model Might Be Wrong)

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Picked as gem Comments 6
12 min read
Web Components did not fail!

Web Components did not fail!

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Comments 3
5 min read
Your Page Loaded Fast. So Why Does It Still Feel Slow?

Your Page Loaded Fast. So Why Does It Still Feel Slow?

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Comments
6 min read
Why Math.random() Is the Wrong Tool for Passwords (and What to Use Instead)

Why Math.random() Is the Wrong Tool for Passwords (and What to Use Instead)

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Comments 1
4 min read
Sending trip places as a stamp sheet, with the whole story in the URL fragment

Sending trip places as a stamp sheet, with the whole story in the URL fragment

Comments
2 min read
I replaced our warehouse paper inventory with one HTML file

I replaced our warehouse paper inventory with one HTML file

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4 min read
Why your photo-to-PDF pages come out in the wrong order (and how to sort them in the browser)

Why your photo-to-PDF pages come out in the wrong order (and how to sort them in the browser)

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4 min read
How I test SMS OTP flows in Playwright without sending real texts

How I test SMS OTP flows in Playwright without sending real texts

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5 min read
When crt.sh's website is down, query its public database instead

When crt.sh's website is down, query its public database instead

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4 min read
I Built a Tiny Calorie Calculator (and What the Numbers Taught Me)

I Built a Tiny Calorie Calculator (and What the Numbers Taught Me)

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2 min read
Our Dependency Scanner Said We Were Clean. The Vulnerability Had Been Public for Two Weeks.

Our Dependency Scanner Said We Were Clean. The Vulnerability Had Been Public for Two Weeks.

Comments 1
4 min read
I built a free no-tax-on-overtime calculator — here is the OBBBA §70202 math

I built a free no-tax-on-overtime calculator — here is the OBBBA §70202 math

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2 min read
Showing a league table offline when the signal at the ground is bad

Showing a league table offline when the signal at the ground is bad

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2 min read
EventSource can't POST. Your LLM stream needs it to.

EventSource can't POST. Your LLM stream needs it to.

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5 min read
Why are we still uploading confidential PDFs to cloud servers just to merge pages?

Why are we still uploading confidential PDFs to cloud servers just to merge pages?

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1 min read
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