File: image-embedding-nested-data-url-from-canvas-post-window-load.html

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<!doctype html>
<html class=reftest-wait>
<title>Drawing SVG image with data: URL subresources (after window load event)</title>
<link rel="match" href="reference/image-with-nested-rects.html">
<style>
img {
  width: 200px;
  height: 200px;
  background-color: red;
}
</style>
<img id="result" src="">
<script>
const canvas = document.createElement('canvas');
canvas.width = 200;
canvas.height = 200;
const context = canvas.getContext('2d');

context.fillStyle = "red";
context.fillRect(0, 0, canvas.width, canvas.height);

window.onload = () => {
  const image = new Image();
  image.src = "support/image-with-nested-data-url-images.svg?" + Math.random().toString();
  image.onload = () => {
    context.drawImage(image, 0, 0, canvas.width, canvas.height);
    const resultImage = document.getElementById("result");
    resultImage.src = canvas.toDataURL();
    resultImage.onload = () => document.documentElement.className = "";
  }
};
</script>