Sometimes it's useful to know whether or not the device has a screen reader that is currently active. The
AccessibilityInfo API is designed for this purpose. You can use it to query the current state of the
screen reader as well as to register to be notified when the state of the screen reader changes.
Here's a small example illustrating how to use
Query whether a screen reader is currently enabled. Returns a promise which
resolves to a boolean. The result is
true when a screen reader is enabled
Add an event handler. Supported events:
change: Fires when the state of the screen reader changes. The argument to the event handler is a boolean. The boolean is
truewhen a screen reader is enabled and
Remove an event handler.
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