35 lines
1.1 KiB
HTML
35 lines
1.1 KiB
HTML
<!DOCTYPE html>
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<html>
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<body>
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<input id="field" onbeforeinput=handleBeforeInput(event)></input>
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<script src="../../resources/dump-as-markup.js"></script>
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<script>
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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.`);
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(function() {
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if (!window.internals || !window.eventSender || !window.testRunner)
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return;
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internals.settings.setInputEventsEnabled(true);
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document.querySelector("#field").focus();
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eventSender.keyDown("a", []);
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eventSender.keyDown("b", []);
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eventSender.keyDown("c", []);
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Markup.dump("field", "initial value");
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testRunner.execCommand("Undo");
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Markup.dump("field", "after prevented undo");
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})();
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function handleBeforeInput(event)
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{
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if (event.inputType === "historyUndo")
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event.preventDefault();
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}
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</script>
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</body>
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</html>
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