1949476.html - mozsearch

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<html>

<head>

  <meta charset="utf-8">

  <title>Bug 1949476 - Crash when TypeAheadFind searches shadow DOM outside document</title>

</head>

<body>

  <script>

    // Set up shadow DOM outside of document body (as sibling to body)

    document.documentElement.append(document.createElement("div"));

    const shadowHost = document.querySelector("div");

    const shadowRoot = shadowHost.attachShadow({ mode: "closed" });

    shadowRoot.textContent = "foo";

    // Set selection into shadow DOM

    const sel = window.getSelection();

    const r = document.createRange();

    r.selectNodeContents(shadowRoot);

    sel.addRange(r);

    const finder = SpecialPowers.Cc["@mozilla.org/typeaheadfind;1"]

                                .getService(SpecialPowers.Ci.nsITypeAheadFind);

    finder.init(SpecialPowers.wrap(window).docShell);

    finder.find("f", false, SpecialPowers.Ci.nsITypeAheadFind.FIND_FIRST, true);

    finder.find("fo", false, SpecialPowers.Ci.nsITypeAheadFind.FIND_NEXT, true);

  </script>

</body>

</html>