import React, { useState, useEffect } from "react";import { Linking, StyleSheet, Text, View } from "react-native";const useMount = func => useEffect(() => func(), []);const useInitialURL = () => {
  const [url, setUrl] = useState(null);
  const [processing, setProcessing] = useState(true);
  useMount(() => {
    const getUrlAsync = async () => {      // Get the deep link used to open the app
      const initialUrl = await Linking.getInitialURL();      // The setTimeout is just for testing purpose
      setTimeout(() => {
        setUrl(initialUrl);
        setProcessing(false);
      }, 1000);
    };
    getUrlAsync();
  });
  return { url, processing };};const App = () => {
  const { url: initialUrl, processing } = useInitialURL();
  return (
    <View style={styles.container}>
      <Text>
        {processing
          ? `Processing the initial url from a deep link`
          : `The deep link is: ${initialUrl || "None"}`}
      </Text>
    </View>
  );};const styles = StyleSheet.create({
  container: { flex: 1, justifyContent: "center", alignItems: "center" },});export default App;