A polyfill that brings Houdinis CSS Custom Paint API and Paint Worklets to all modern browsers (Edge, Firefox, Safari, and Chrome). Performance is particularly good in Firefox and Safari, where this polyfill leverages -webkit-canvas() and -moz-element() for optimized rendering. For other browsers, framerate is governed by Canvas toDataURL() toBlob() speed. As of version 3, this polyfill also includes basic implementations of CSS.supports(), CSS.registerProperty(), and CSS unit functions (CSS.px() etc), which are injected in browsers without native support.

What are Paint Worklets?

Paint Worklets are JavaScript modules that allow you to write custom graphics code. Once registered, they can be applied to elements using CSS. Let’s explore this concept further with an analogy.

Imagine that a Paint Worklet is like a chef in a kitchen, specialized in creating unique dishes. The chef (Paint Worklet) can take a set of ingredients (context, geometry, and properties) and create something extraordinary, filling a plate (rendering an element on the web) with a custom meal (the visual output). Whenever the dish is required, you simply call upon the chef by name (using the CSS syntax) and the custom meal is served.

registerPaint('box', class {
  paint(ctx, geom, properties) {
    ctx.fillRect(0, 0, geom.width, geom.height);
  }
});

Applying a Paint Worklet

After you have registered your box.js worklet, you can apply it to an HTML element:

CSS.paintWorklet.addModule('box.js');
var el = document.querySelector('h1');
el.style.background = paint('box');

Installation and Usage

Getting started with the CSS Paint Polyfill is straightforward. You can include the polyfill in your project by using one of the following methods:

• Directly from a script:

<script src="css-paint-polyfill.js"></script>

• Using a CDN:

<script src="https://unpkg.com/css-paint-polyfill"></script>

• With a module bundler:

import css-paint-polyfill;

• With ES Modules on the web:

import 'https://unpkg.com/css-paint-polyfill';

Troubleshooting

If you encounter any issues while using the CSS Custom Paint Polyfill, here are some potential troubleshooting tips:

• Ensure that your browser is updated to the latest version.
• Double-check the paths to your JavaScript files to confirm they are correct.
• Look for any syntax errors in your JavaScript code.
• If the polyfill seems not to work, try clearing your browser cache.

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Contributing

Interested in contributing to the project? Check out the CONTRIBUTING.md for guidelines.

To hack on the polyfill locally:

git clone git@github.com:GoogleChromeLabs/css-paint-polyfill.git
cd css-paint-polyfill
npm install
npm start # open http://localhost:5000

At fxis.ai, we believe that such advancements are crucial for the future of AI, as they enable more comprehensive and effective solutions. Our team is continually exploring new methodologies to push the envelope in artificial intelligence, ensuring that our clients benefit from the latest technological innovations.