Displaying a dialog or popup in React Native when catching errors

Question

Displaying a dialog or popup in React Native when catching errors

Exploring React Native has been quite a journey for me, especially when trying to implement a popup for error handling. Despite numerous attempts, I haven't been successful in getting it to work as desired. The code snippet below captures my current implementation:

import React, { useState, useEffect } from 'react'
import { Alert, Modal, TouchableOpacity, StyleSheet, View, Pressable } from 'react-native'
import { Text } from 'react-native-paper'
import Background from '../components/Background'
import Logo from '../components/Logo'
...

Despite deploying various libraries and utilities, I seem to be struggling with triggering a popup notification upon encountering errors. Although the API endpoint functions correctly by returning tokens or status codes like 403 and 503, incorporating effective error handling mechanisms remains elusive.

Having scoured various online resources for potential solutions, including leveraging Modals, Popups, and Alerts, I continue to face challenges in achieving the desired functionality within my React Native project.

javascript android ios react-native

Answer 1

Answer №1

To incorporate the Alert component in your react-native project, you can implement the following code snippet:

fetchEvents() {
   fetch('http://www.correcturl.com', {
     method: 'GET',
     redirect: 'follow'
   })
   .then(function(response) {
       if (response.status == 200) {
           let responseText = JSON.stringify(response.text());
           console.log(responseText);
       }
     else throw new Error('HTTP response status does not match expected 200.');
   })
    .catch(function(error) {
       Alert.alert(error);   // Utilizing this line for displaying the error message
   });
}

Answer 2

To incorporate the Alert component in your react-native project, you can implement the following code snippet:

fetchEvents() {
   fetch('http://www.correcturl.com', {
     method: 'GET',
     redirect: 'follow'
   })
   .then(function(response) {
       if (response.status == 200) {
           let responseText = JSON.stringify(response.text());
           console.log(responseText);
       }
     else throw new Error('HTTP response status does not match expected 200.');
   })
    .catch(function(error) {
       Alert.alert(error);   // Utilizing this line for displaying the error message
   });
}

Answer 3

Answer №2

  const Registration = async () => {
    try {
      const response = await fetch('https://www.customdomain.com/api', {
        method: 'POST',
        headers: {
          Accept: 'application/json',
          'Content-Type': 'application/json',
        },
        body: JSON.stringify({
          username: emailInput.value,
          password: passwordInput.value
        })
      })
      if (response.status === 200) {
        let data = await response.json()
        if ((typeof data.token !== 'undefined') && (data.token.length > 230)) {
          alert('Success! User registered.')

        } else {
          navigation.redirectTo({
            index: 0,
            routes: [{ name: 'ErrorPage' }],
          })
        }
      } else {
        throw new Error(`Registration failed with status code ${response.status}`);

      }
    } catch (error) {
      console.log(error)
      // implement modal opening logic here
      //showErrorModal(error)
    }

  }

Answer 4

  const Registration = async () => {
    try {
      const response = await fetch('https://www.customdomain.com/api', {
        method: 'POST',
        headers: {
          Accept: 'application/json',
          'Content-Type': 'application/json',
        },
        body: JSON.stringify({
          username: emailInput.value,
          password: passwordInput.value
        })
      })
      if (response.status === 200) {
        let data = await response.json()
        if ((typeof data.token !== 'undefined') && (data.token.length > 230)) {
          alert('Success! User registered.')

        } else {
          navigation.redirectTo({
            index: 0,
            routes: [{ name: 'ErrorPage' }],
          })
        }
      } else {
        throw new Error(`Registration failed with status code ${response.status}`);

      }
    } catch (error) {
      console.log(error)
      // implement modal opening logic here
      //showErrorModal(error)
    }

  }

Displaying a dialog or popup in React Native when catching errors

Answer №1

Answer №2

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