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- /** Gets whether an event could be a faked `mousedown` event dispatched by a screen reader. */
- function isFakeMousedownFromScreenReader(event) {
- // Some screen readers will dispatch a fake `mousedown` event when pressing enter or space on
- // a clickable element. We can distinguish these events when `event.buttons` is zero, or
- // `event.detail` is zero depending on the browser:
- // - `event.buttons` works on Firefox, but fails on Chrome.
- // - `detail` works on Chrome, but fails on Firefox.
- return event.buttons === 0 || event.detail === 0;
- }
- /** Gets whether an event could be a faked `touchstart` event dispatched by a screen reader. */
- function isFakeTouchstartFromScreenReader(event) {
- const touch = (event.touches && event.touches[0]) || (event.changedTouches && event.changedTouches[0]);
- // A fake `touchstart` can be distinguished from a real one by looking at the `identifier`
- // which is typically >= 0 on a real device versus -1 from a screen reader. Just to be safe,
- // we can also look at `radiusX` and `radiusY`. This behavior was observed against a Windows 10
- // device with a touch screen running NVDA v2020.4 and Firefox 85 or Chrome 88.
- return (!!touch &&
- touch.identifier === -1 &&
- (touch.radiusX == null || touch.radiusX === 1) &&
- (touch.radiusY == null || touch.radiusY === 1));
- }
- export { isFakeTouchstartFromScreenReader as a, isFakeMousedownFromScreenReader as i };
- //# sourceMappingURL=fake-event-detection-DWOdFTFz.mjs.map
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