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chromium/third_party/blink/web_tests/external/wpt/scroll-to-text-fragment/scroll-to-text-fragment-api.html 

<!doctype html>
<title>Fragment directive API</title>
<meta charset=utf-8>
<link rel="help" href="https://wicg.github.io/ScrollToTextFragment/">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
<script>
test(t => {
  assert_equals(typeof(document.fragmentDirective), 'object', 'document.fragmentDirective is defined');
}, 'Scroll to text is feature detectable via document.fragmentDirective');

test(t =>{
  document.fragmentDirective = 'text=test';
  assert_equals(window.scrollY, 0, 'Setting document.fragmentDirective did not have an effect on scroll position');
  assert_equals(typeof(document.fragmentDirective), 'object', 'document.fragmentDirective is still an object type');
  assert_equals(Object.keys(document.fragmentDirective).length, 0, 'document.fragmentDirective has no properties');
}, 'Setting document.fragmentDirective has no effect');
</script>
<style>
  body {
    height: 3200px;
  }
  #text {
    position: absolute;
    top: 3000px;
  }
</style>
<body>
  <p id="text">This is a test page</p>
</body>