Make the Web Brighter with the CSS Paint API
summary
Explains how the CSS Paint API (Houdini worklet) actually generates images via registerPaint and a paint method that receives paint(ctx, geom, props, args), runs in a separate worklet thread, is stateless and cannot access DOM, and requires inputs via inputProperties or typed inputArguments. Shows Chrome 65+ support and a JS polyfill that creates canvases, demos: responsive generated backgrounds, ripples without extra DOM nodes, stars, QR codes, pie and bar charts, and measured bundles as small as ~800 bytes versus kilobyte images.
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chapters (25)
- 0:00Introduction to CSS Paint API
- 1:28What is Houdini project
- 6:16Houdini APIs and Worklets
- 8:05CSS Paint API basics
- 11:50Browser support and polyfills
- 12:53Creating a Paint Worklet
- 15:52Hello World Paint Worklet demo
- 18:27Subscribing to CSS properties
- 20:35Passing arguments to Paint API
- 24:01Context options and performance
- 24:43Practical use cases for CSS Paint
- 25:05Generated backgrounds with CSS Paint
- 27:17CSS Paint vs traditional images
- 29:05Responsive design with CSS Paint
- 29:28Reducing DOM nodes with CSS Paint
- 30:13Custom star rating component
- 31:03Advanced demos: QR code generator
- 32:09Performance with WebAssembly
- 32:30Donut and pie chart visualizations
- 33:15Bar charts with CSS Paint
- 33:59Animating custom properties
- 35:52Stateful animations with particles
- 36:54Custom borders and effects
- 37:55Future of CSS Paint API
- 38:17Resources and closing
