<html>
<body>
<style>
textarea {
background-image: url(checkerboard);
background-image: paint(checkerboard);
}
@supports (background: paint(id)) {
background-image: paint(checkerboard);
}
</style>
<textarea></textarea>
<script>
const addPaintWorklet = async () => {
await CSS.paintWorklet.addModule('worklet.js');
}
</script>
</body>
</html>