React-Native: Go back on android hardware back button pressed

Question

I am trying to add going back on webview when the android backbutton was pressed and I still couldn\'t manage to make it work.

This is my code:

Answer 1

Here's a solution with Typescript and useRef and useEffect hooks.

I didn't use canGoBack, but it seems to work regardless.

import React, { useEffect, useRef } from 'react';
import { BackHandler } from 'react-native';
import WebView from 'react-native-webview';

const WebViewWrapper = (): JSX.Element => {
  const webview = useRef(null);
  const onAndroidBackPress = (): boolean => {
    if (webview.current) {
      webview.current.goBack();
      return true; // prevent default behavior (exit app)
    }
    return false;
  };
  useEffect((): (() => void) => {
    BackHandler.addEventListener('hardwareBackPress', onAndroidBackPress);
    return (): void => {
      BackHandler.removeEventListener('hardwareBackPress', onAndroidBackPress);
    };
  }, []); // Never re-run this effect
  return (
    
  )
}