react-native#EmitterSubscription TypeScript Examples

/**
   * An async hide function. This is useful when you want to show one ActionSheet after closing another.
   *
   * @param id id of the ActionSheet to show
   * @param data An data to pass to the ActionSheet. Will be available from `onClose` prop.
   */
  static async hide(id: string, data?: unknown): Promise<boolean> {
    return new Promise((resolve) => {
      let sub: EmitterSubscription;
      const fn = () => {
        resolve(true);
        sub?.remove();
      };
      sub = DeviceEventEmitter.addListener(`onclose_${id}`, fn);
      DeviceEventEmitter.emit(`hide_${id}`, data);
    });
  }

useKeyboard = (isEnable = true): [number] => {
  const showSubscription = useRef<EmitterSubscription>();
  const hideSubscription = useRef<EmitterSubscription>();
  const [keyboardHeight, setKeyboardHeight] = useState(0);

  function onKeyboardWillShow(e: KeyboardEvent): void {
    setKeyboardHeight(e.endCoordinates.height);
  }

  function onKeyboardWillHide(): void {
    setKeyboardHeight(0);
  }

  useEffect(() => {
    if (isEnable) {
      const keyboardShowEvent =
        Platform.OS === 'android' ? 'keyboardDidShow' : 'keyboardWillShow';
      const keyboardHideEvent =
        Platform.OS === 'android' ? 'keyboardDidHide' : 'keyboardWillHide';
      showSubscription.current = Keyboard.addListener(
        keyboardShowEvent,
        onKeyboardWillShow
      );
      hideSubscription.current = Keyboard.addListener(
        keyboardHideEvent,
        onKeyboardWillHide
      );
    }
    return (): void => {
      showSubscription.current?.remove();
      hideSubscription.current?.remove();
    };
  }, [isEnable]);

  return [keyboardHeight];
}

purchaseUpdate: EmitterSubscription

purchaseError: EmitterSubscription

sheetManagerHideEvent: EmitterSubscription | null;

sheetManagerShowEvent: EmitterSubscription | null;

keyboardShowSubscription: EmitterSubscription | null;

KeyboardHideSubscription: EmitterSubscription | null;

sheetManagerHideEvent: EmitterSubscription | null = null;

sheetManagerShowEvent: EmitterSubscription | null = null;

keyboardShowSubscription: EmitterSubscription | null = null;

KeyboardHideSubscription: EmitterSubscription | null = null;

purchaseUpdateSubscription: EmitterSubscription

purchaseErrorSubscription: EmitterSubscription

onClientErrorSubscription?: EmitterSubscription;