CSS Houdini
summary
Explains that CSS Houdini exposes low‑level rendering phases so JavaScript can produce typed CSS values (Typed OM returns unit objects not strings), register animated custom properties with their types (Properties and Values API), and run off‑main‑thread paint scripts (Paint Worklet). Demonstrates a runnable paint worklet that draws scratchy checklist lines and confirms it works in Blink/Chrome today while requiring fallbacks for other browsers.
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