moveBefore-id-map.html

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This WPT test may be referenced by the following Test IDs:
- /dom/nodes/moveBefore/moveBefore-id-map.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<body>

  <div id="container"></div>

  <div id="target" data-target></div>

  <span id="target" data-span></span>

</body>

<script>

  test(() => {

      let shadowRoot = container.attachShadow({mode: "open"});

      let div = document.createElement("div");

      shadowRoot.appendChild(div);

      let target = document.querySelector('[data-target]');

      assert_equals(document.getElementById("target"), target);

      assert_equals(shadowRoot.getElementById("target"), null);

      div.moveBefore(target, null);

      assert_equals(document.getElementById("target"), document.querySelector('[data-span]'));

      assert_equals(shadowRoot.getElementById("target"), target);

  }, 'moveBefore() correctly updates id map');

</script>