File: auto-expand-details-element-fragment.html

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<!DOCTYPE html>
<link rel="author" title="Joey Arhar" href="mailto:jarhar@chromium.org">
<link rel="help" href="https://github.com/whatwg/html/pull/6466">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>

<div style="height:2000px">spacer</div>

<details id=details>
  <div id=target>target</div>
</details>

<script>
async_test(t => {
  assert_false(details.hasAttribute('open'),
    `The <details> should be closed at the start of the test.`);
  assert_equals(window.pageYOffset, 0,
    `The page should be scrolled to the top at the start of the test.`);

  window.location.hash = '#target';

  requestAnimationFrame(t.step_func_done(() => {
    assert_true(details.hasAttribute('open'),
      `<details> should be opened by navigating to an element inside it.`);
    assert_not_equals(window.pageYOffset, 0,
      `The page should be scrolled down to the <details> element.`);
  }));
});
</script>