Blitz - WPT: custom-highlight-dynamic-viewport-metrics-first-line-001.html

wpt / css / css-highlight-api / painting / custom-highlight-dynamic-viewport-metrics-first-line-001.html

/css/css-highlight-api/painting/custom-highlight-dynamic-viewport-metrics-first-line-001.html

<!DOCTYPE html>
<html class="reftest-wait">
<meta charset="UTF-8">
<title>CSS Highlight API Test: Highlights on ::first-line text update on viewport changes</title>
<link rel="help" href="https://drafts.csswg.org/css-highlight-api-1/">
<link rel="help" href="https://drafts.csswg.org/css-pseudo/#highlight-styling">
<link rel="help" href="https://drafts.csswg.org/css-values-4/#viewport-relative-lengths">
<link rel="match" href="custom-highlight-dynamic-viewport-metrics-first-line-001-ref.html">
<meta name="assert" content="Highlight styles using viewport units on text affected by ::first-line update correctly when the viewport changes. This tests that cached lazy pseudos are invalidated even when the text frame's style differs from the originating element's primary style.">
<script src="/common/reftest-wait.js"></script>
<head>
  <style>
    iframe {
      width: 200px;
      height: 100px;
    }

    iframe.resize {
      width: 400px;
      height: 200px;
    }
</style>
</head>
<iframe id="iframe" src="resources/iframe-viewport-first-line.html"></iframe>
<script>
  function runtest() {
    // Ensure the highlight is painted (and cached) at the initial viewport size
    requestAnimationFrame(() => {
      requestAnimationFrame(() => {
        // Resize the viewport
        iframe.classList.add('resize');
        requestAnimationFrame(() => takeScreenshot());
      });
    });
  }
  iframe.onload = runtest;
</script>
</html>

/css/css-highlight-api/painting/custom-highlight-dynamic-viewport-metrics-first-line-001-ref.html

<!DOCTYPE html>
<meta charset="UTF-8">
<title>CSS Highlight API Test: Reference</title>
<head>
  <style>
    iframe {
      width: 400px;
      height: 200px;
    }
</style>
</head>
<iframe id="iframe" src="resources/iframe-viewport-first-line.html"></iframe>
</html>