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AccessibilityInfo

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.

Example​

Reference

Methods​

addEventListener()​

React TSX
static addEventListener(
  eventName: AccessibilityChangeEventName | AccessibilityAnnouncementEventName,
  handler: (
    event: AccessibilityChangeEvent | AccessibilityAnnouncementFinishedEvent,
  ) => void,
): EmitterSubscription;

Add an event handler. Supported events:

Event nameDescription
accessibilityServiceChanged
Android
Fires when some services such as TalkBack, other Android assistive technologies, and third-party accessibility services are enabled. The argument to the event handler is a boolean. The boolean is true when a some accessibility services is enabled and false otherwise.
announcementFinished
iOS
Fires when the screen reader has finished making an announcement. The argument to the event handler is a dictionary with these keys:
  • announcement: The string announced by the screen reader.
  • success: A boolean indicating whether the announcement was successfully made.
boldTextChanged
iOS