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  <title>Inspector Traversal Test Data</title>
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    #pseudo::before {
      content: "before";
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    #pseudo-empty::before {
      content: "before an empty element";
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    #shadow::before {
      content: "Testing ::before on a shadow host";
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      // Set up a basic shadow DOM
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      const root = host.attachShadow({ mode: "open" });

      const h3 = document.createElement("h3");
      h3.append("Shadow ");

      const em = document.createElement("em");
      em.append("DOM");

      const select = document.createElement("select");
      select.setAttribute("multiple", "");
      h3.appendChild(em);
      root.appendChild(h3);
      root.appendChild(select);

      // Put a copy of the body in an iframe to test frame traversal.
      const body = document.querySelector("body");
      const data = "data:text/html,<html>" + body.outerHTML + "<html>";
      const iframe = document.createElement("iframe");
      iframe.setAttribute("id", "childFrame");
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      body.appendChild(iframe);
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<body style="background-color:white">
  <h1>Inspector Actor Tests</h1>
  <span id="longstring">longlonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglong</span>
  <span id="shortstring">short</span>
  <span id="empty"></span>
  <div id="longlist" data-test="exists">
    <div id="a">a</div>
    <div id="b">b</div>
    <div id="c">c</div>
    <div id="d">d</div>
    <div id="e">e</div>
    <div id="f">f</div>
    <div id="g">g</div>
    <div id="h">h</div>
    <div id="i">i</div>
    <div id="j">j</div>
    <div id="k">k</div>
    <div id="l">l</div>
    <div id="m">m</div>
    <div id="n">n</div>
    <div id="o">o</div>
    <div id="p">p</div>
    <div id="q">q</div>
    <div id="r">r</div>
    <div id="s">s</div>
    <div id="t">t</div>
    <div id="u">u</div>
    <div id="v">v</div>
    <div id="w">w</div>
    <div id="x">x</div>
    <div id="y">y</div>
    <div id="z">z</div>
  </div>
  <div id="longlist-sibling">
    <div id="longlist-sibling-firstchild"></div>
  </div>
  <p id="edit-html"></p>

  <select multiple><option>one</option><option>two</option></select>
  <div id="pseudo"><span>middle</span></div>
  <div id="pseudo-empty"></div>
  <div id="shadow">light dom</div>
  <object>
      <div id="1"></div>
  </object>
  <div class="node-to-duplicate"></div>
  <div id="scroll-into-view" style="margin-top: 1000px;">scroll</div>
</body>
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