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fix(cdk/a11y): detect fake touchstart events from screen readers #21987

Merged
merged 1 commit into from
Feb 25, 2021
Merged

fix(cdk/a11y): detect fake touchstart events from screen readers #21987

merged 1 commit into from
Feb 25, 2021

Commits on Feb 23, 2021

  1. fix(cdk/a11y): detect fake touchstart events from screen readers 

    We currently have handling for the case where a `mousedown` event is thrown off by a
fake `mousedown` listener that may be dispatched by a screen reader when an element
is activated. It turns out that if the device has touch support, screen readers may dispatch
a fake `touchstart` event instead of a fake `mousedown`.

These changes add another utility function that allows us to distinguish the fake events
and fix some issues where keyboard focus wasn't being shown because of the fake
`touchstart` events.

Fixes angular#21947.
    @crisbeto
    crisbeto committed Feb 23, 2021
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