File: image-compositing-large-scale-change.html

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<!DOCTYPE html>
<html class="reftest-wait">
<title>Composited images correctly display under large scale transform changes</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1">
<link rel="match" href="image-compositing-large-scale-change-ref.html"/>
<link rel="help" href="https://html.spec.whatwg.org/multipage/#the-img-element">
<style>
html { overflow: hidden; }
#change {
  will-change:transform;
  width:1000px;
  height:1000px;
  position:absolute;
  top: calc(50% - 5px);
  left: calc(50% - 5px);
}
</style>
<img id="change" src="image.png"></img>
<div id="placeholder" style="position:relative"></div>
<script>
window.onload = () => {
  requestAnimationFrame(() => {
    requestAnimationFrame(() => {
      let image = document.querySelector('#change');
      image.style.transform = 'scale(20)';
      placeholder.innerText = "div";

      requestAnimationFrame(() => {
        document.documentElement.classList.remove("reftest-wait");
      });
    });
  });
}
</script>