fix(a11y): focus monitor incorrectly detecting fake mousedown from screen reader #15214
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…reen reader In some cases screen readers dispatch a fake `mousedown` event, instead of a `keydown` which causes the `FocusMonitor` to register focus as if it's coming from a keyboard interaction. An example where this is visible is in the `mat-datepicker` calendar where having screen reader on and opening the calendar with the keyboard won't show the focus indication, whereas it's visible if the screen reader is turned off. These changes add an extra check that will detect fake mousedown events correctly.
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In some cases screen readers dispatch a fake `mousedown` event, instead of a `keydown` which causes the `FocusMonitor` to register focus as if it's coming from a keyboard interaction. An example where this is visible is in the `mat-datepicker` calendar where having screen reader on and opening the calendar with the keyboard won't show the focus indication, whereas it's visible if the screen reader is turned off. These changes add an extra check that will detect fake mousedown events correctly.
This was referenced May 3, 2020
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In some cases screen readers dispatch a fake
mousedownevent, instead of akeydownwhich causes theFocusMonitorto register focus as if it's coming from a keyboard interaction. An example where this is visible is in themat-datepickercalendar where having screen reader on and opening the calendar with the keyboard won't show the focus indication, whereas it's visible if the screen reader is turned off.These changes add an extra check that will detect fake mousedown events correctly.