blob: 5e7a549d587d9f4f5b766f092eef540e33474a2b [file] [log] [blame]
<!DOCTYPE html>
<html>
<body>
<input id="field" onbeforeinput=handleBeforeInput(event)></input>
<script src="../../resources/dump-as-markup.js"></script>
<script>
Markup.description(`To manually test this, type some into the input field below and try to undo. The value of the text field should not change after attempting to undo.`);
(function() {
if (!window.internals || !window.eventSender || !window.testRunner)
return;
document.querySelector("#field").focus();
eventSender.keyDown("a", []);
eventSender.keyDown("b", []);
eventSender.keyDown("c", []);
Markup.dump("field", "initial value");
testRunner.execCommand("Undo");
Markup.dump("field", "after prevented undo");
})();
function handleBeforeInput(event)
{
if (event.inputType === "historyUndo")
event.preventDefault();
}
</script>
</body>
</html>