selection/collapse.htm

<!DOCTYPE HTML>
<meta charset=utf-8>
<title>Selection: Collapse the selection using collapse()</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
window.onload = function() {
  test(function() {
    var selection = window.getSelection();
    var p1 = document.getElementById("p1");

    var range = document.createRange();
    range.selectNode(p1);
    selection.addRange(range);
    selection.collapse(p1, 0);

    assert_equals(selection.anchorNode, p1);
    assert_equals(selection.anchorOffset, 0);
    assert_equals(selection.focusNode, p1);
    assert_equals(selection.focusOffset, 0);
    assert_equals(selection.isCollapsed, true);
    assert_equals(selection.rangeCount, 1);
    assert_equals(selection.toString(), "");
  });
};
</script>
<div id=log></div>
<p id="p1">Add a range to the selection</p>
</body>
</html>