Skip to content

Instantly share code, notes, and snippets.

@ThaUnknown

ThaUnknown/index.html

Created May 5, 2023 15:58
Show Gist options
  • Save ThaUnknown/a6c32192c25f8596ab33dc28cd44fb13 to your computer and use it in GitHub Desktop.
Save ThaUnknown/a6c32192c25f8596ab33dc28cd44fb13 to your computer and use it in GitHub Desktop.
Download ZIP
Desynchronized canvas rendering under video element when no DOM updates are happening
Raw
index.html
<!DOCTYPE html>
<html>
<head>
<meta charset='utf-8'>
<meta http-equiv='X-UA-Compatible' content='IE=edge'>
<title>Page Title</title>
<meta name='viewport' content='width=device-width, initial-scale=1'>
<style>
canvas {
position: absolute;
top: 0;
left: 0;
}
</style>
<script type="module" defer>
const ctx = canvas.getContext('2d', { desynchronized: true })
ctx.fillStyle = '#f00'
ctx.fillRect(0, 0, 100, 100)
</script>
</head>
<body>
<video src="https://commondatastorage.googleapis.com/gtv-videos-bucket/sample/BigBuckBunny.mp4#t=100" controls id="video"></video>
<canvas id="canvas" width="100" height="100"></canvas>
</body>
</html>
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment