test_caretPositionFromPoint_insertAnonymousContent.html

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<!DOCTYPE html>

<html>

  <head>

    <meta charset="utf-8" />

    <title>Test for caretPositionFromPoint with anonymous content</title>

    <script src="/tests/SimpleTest/SimpleTest.js"></script>

    <script src="/tests/SimpleTest/EventUtils.js"></script>

    <link rel="stylesheet" href="/tests/SimpleTest/test.css" />

  </head>

  <body>

    <script>

      info("Inserting anonymous content into the document frame");

      let chromeDoc = SpecialPowers.wrap(document);

      let anonymousContent = chromeDoc.insertAnonymousContent();

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

      div.style.position = "fixed";

      div.style.top = "0";

      div.style.left = "0";

      div.style.width = "100%";

      div.style.height = "100%";

      div.style.pointerEvents = "auto";

      div.style.backgroundColor = "red";

      anonymousContent.root.appendChild(div);

      let caretPos = document.caretPositionFromPoint(

        innerWidth / 2,

        innerHeight / 2

);

      is(caretPos, null, "caretPos should be null");

      info("Removing the anonymous content");

      chromeDoc.removeAnonymousContent(anonymousContent);

    </script>

  </body>

</html>