How browsers work, from URL to painted pixels in 40 seconds
211.6K views·2.4K likes·1.7K saves·158 reposts·Posted 24 Sept 2026 · 0:40 · Explainers
Our note
A blueprint-style explainer steps through the browser pipeline, here the paint stage replaying a display list of drawRect and drawText calls onto a page; every frame was drawn in JavaScript.
The creator’s post
Claude Opus 5.5 drew each frame of this animation in JavaScript. Here's "how browsers work" in 40 seconds.
The prompt
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1 · Start from a template
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2 · Direct it like an editor
Ask for one self-contained HTML file on a fixed 1920×1080 stage, link this video as the reference, and send two or three rounds of specific notes.
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How it was made
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