contain-paint-change-opacity.html

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This WPT test may be referenced by the following Test IDs:
- /css/css-contain/contain-paint-change-opacity.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<html class="reftest-wait">

<link rel="help" href="https://drafts.csswg.org/css-contain-2/#contain-property">

<link rel="match" href="../reference/ref-filled-green-100px-square.xht">

<script src="/common/reftest-wait.js"></script>

<script src="/common/rendering-utils.js"></script>

<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>

<div style="width: 100px; background: red">

  <div id="container" style="contain: paint; opacity: 0.1">

    <div style="height: 100px; background: green; position: relative"></div>

  </div>

</div>

<script>

waitForAtLeastOneFrame().then(() => {

  container.style.opacity = 1;

  takeScreenshot();

});

</script>

</html>