collapse-null.html | Explore in Territory

<!DOCTYPE HTML>
<html>
<body>
<script src="../../resources/js-test.js"></script>

<div id="div" contenteditable="true">hello</div>
<script>
description("Ensure that collapse with null clears selection");

var selection = getSelection();
selection.selectAllChildren(div);
    selection.rangeCount
    shouldBe("selection.rangeCount", "1");
    selection.collapse(null);
    shouldBe("selection.rangeCount", "0");
    selection.collapse(div.firstChild, 2);
    shouldBe("selection.rangeCount", "1");
    selection.collapse(null);
    shouldBe("selection.rangeCount", "0");
</script>

</body>
</html>

chromium/third_party/blink/web_tests/editing/selection/collapse-null.html