css/css-overflow/overflow-clip-margin-invalidation.html

<!DOCTYPE html>
<html class="reftest-wait">
<head>
<title>CSS Overflow: overflow-clip-margin: invalidation on change</title>
<link rel="help" href="https://www.w3.org/TR/css-overflow-3/#propdef-overflow-clip-margin">
<meta name="assert" content="overflow-clip-margin: toggling should invalidate.">
<link rel="author" title="Scott Violet" href="mailto:sky@chromium.org">
<link rel="match" href="overflow-clip-margin-invalidation-ref.html">
<style>
  .container {
      display: flex;
  }
  .parent {
      flex: none;
      width: 100px;
      height: 100px;
      flex: none;
      overflow: clip;
  }
  .child {
      width: 200px;
      height: 200px;
      position: relative;
      top: -50px;
      left: -50px;
      background-color: green;
  }
  .spacer {
      flex: none;
      height: 100px;
      width: 100px;
  }
  .margin {
    overflow-clip-margin: 10px;
  }
</style>
<script src="/common/reftest-wait.js"></script>
<script src="/common/rendering-utils.js"></script>
</head>
<body>
<div class="spacer"></div>
<div class="container">
  <div class="spacer"></div>
  <div id="div_with_margin" class="parent margin">
    <div class="child"></div>
  </div>
<div class="spacer"></div>
<div class="container">
  <div class="spacer"></div>
  <div id="div_without_margin" class="parent">
    <div class="child"></div>
  </div>
</body>
<script>
async function runTest() {
  document.getElementById('div_with_margin').classList.remove("margin");
  document.getElementById('div_without_margin').classList.add("margin");
  takeScreenshot();
}
onload = () => {
  waitForAtLeastOneFrame().then(() => { runTest() });
}
</script>
</html>