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Test Info:

for (const variant of ['TouchEvent', 'touchevent', 'TOUCHEVENT']) {
test(() => {
if (!('ontouchstart' in document)) {
assert_throws_dom("NOT_SUPPORTED_ERR", () => {
document.createEvent(variant);
});
} else {
document.createEvent(variant);
// The interface and other details of the event is tested in Document-createEvent.https.html
}
}, `document.createEvent('${variant}') should throw if 'expose legacy touch event APIs' is false`);
}