test_input_datetime_preventDefault.html

Enable keyboard shortcuts

<!doctype html>

<title>Test for bug 1848158</title>

<script src="/tests/SimpleTest/SimpleTest.js"></script>

<script src="/tests/SimpleTest/EventUtils.js"></script>

<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>

<input id="input" type="date" value="1998-01-22">

<script>

SimpleTest.waitForExplicitFinish();

SimpleTest.waitForFocus(function() {

  let value = input.value;

  input.addEventListener("keydown", function(e) {

    e.preventDefault();

});

  isnot(value, "", "should have a value");

  input.focus();

  synthesizeKey("KEY_Backspace");

  is(input.value, value, "Value shouldn't change");

  SimpleTest.finish();

});

</script>