chromium/src/third_party/blink/renderer/core/testing/data/composited_selection_bounds_editable_div.html

<style>
    @font-face {
        font-family: ahem;
        src: url(Ahem.ttf);
    }
    * {
        font-family: ahem;
    }
</style>
<div id="text" contentEditable="true">
    The quick brown fox jumped over the lazy dog.
</div>
<script>
    var textNode = document.getElementById("text");
    textNode.focus();

    var expectEditable = true;
    var expectEmptyTextFormControl = false;
    window.expectedResult = [document, 8, 8, 8, 20, document, 8, 8, 8, 20, expectEditable, expectEmptyTextFormControl];
</script>