function runTests() {
let input = window.document.getElementById("test_number");
// focus: whether the target input element is focused
// deltaY: deltaY of WheelEvent
// deltaMode: deltaMode of WheelEvent
// valueChanged: expected value changes after input element handled the wheel event
let params = [
{focus: true, deltaY: 1.0, deltaMode: WheelEvent.DOM_DELTA_LINE, valueChanged: -1},
{focus: true, deltaY: -1.0, deltaMode: WheelEvent.DOM_DELTA_LINE, valueChanged: 1},
{focus: true, deltaY: 1.0, deltaMode: WheelEvent.DOM_DELTA_PAGE, valueChanged: -1},
{focus: true, deltaY: -1.0, deltaMode: WheelEvent.DOM_DELTA_PAGE, valueChanged: 1},
{focus: true, deltaY: 1.0, deltaMode: WheelEvent.DOM_DELTA_PIXEL, valueChanged: 0},
{focus: true, deltaY: -1.0, deltaMode: WheelEvent.DOM_DELTA_PIXEL, valueChanged: 0},
{focus: false, deltaY: 1.0, deltaMode: WheelEvent.DOM_DELTA_LINE, valueChanged: 0},
{focus: false, deltaY: -1.0, deltaMode: WheelEvent.DOM_DELTA_LINE, valueChanged: 0}
];
let testIdx = 0;
// The expected value of the number field; used in is() check below.
// Initialized to the value that the field starts out with; subtests will
// modify this if they expect to modify the value.
let expectedValue = parseInt(input.value);
// Actual/expected number of mutations to the number field's value:
let actualChangeCount = 0;
let expectedChangeCount = 0;
const prefName = "dom.input.number_and_range_modified_by_mousewheel";
let didFlipPref = false;
let isPrefEnabled = SpecialPowers.getBoolPref(prefName);
is(isPrefEnabled, false, "Expecting pref to be disabled by default"); input.addEventListener("change", () => {
++actualChangeCount;
});
function runNext() {
let p = params[testIdx];
(p.focus) ? input.focus() : input.blur();
if (isPrefEnabled && p.valueChanged != 0) {
expectedChangeCount++;
expectedValue += p.valueChanged;
}
const wheelEventPromise = new Promise(res => { input.addEventListener("wheel", e => res(e), { passive: true, once: true });
})
info(`actualChangeCount ${actualChangeCount}, expectedChangeCount ${expectedChangeCount}`);
is(actualChangeCount, expectedChangeCount, "UA should fire change event when input's value changed");
// Need to wrap event to see if it was default prevented by system
const wheelEvent = SpecialPowers.wrap(await wheelEventPromise);
const shouldScroll = !(isPrefEnabled && p.valueChanged);
if (shouldScroll) {
ok(!wheelEvent.defaultPrevented, "Wheel event should not be default prevented");
} else {
ok(wheelEvent.defaultPrevented, "Wheel event should be default prevented");
}
if (++testIdx < params.length) {
// More subtests remain; kick off the next one.
runNext();
} else if (!didFlipPref) {
// Reached the end of the subtest list. Flip the pref
// and restart our iteration over the subtests.
await SpecialPowers.pushPrefEnv({
set: [[prefName, !isPrefEnabled]],
});
isPrefEnabled = !isPrefEnabled;
didFlipPref = true;
testIdx = actualChangeCount = expectedChangeCount = 0;
runNext();
} else {
// Reached the end of the subtest list, for both pref settings.
// We're done!
SimpleTest.finish();
}
});
}
runNext();
}
</script>
</body>
</html>
Messung V0.5 in Prozent
¤ Dauer der Verarbeitung: 0.16 Sekunden
(vorverarbeitet am 2026-08-27)
¤
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