How to create a simple Alert dialog in React Native? Code Example

Table of Contents Hide
  1. Code Example
    1. Live Demo
  2. Conclusion

An alert dialog can be created using <Alert> component in React Native. It can show a title, message and buttons. Title is required and everything else is optional.

The format of alert looks like this –

import {Alert} from 'react-native'

Alert.alert(title, message, buttons, options)

/**
* Example Usage -
Alert.alert(
      "Alert Title",
      "My Alert Msg",
      [
        {
          text: "Cancel",
          onPress: () => console.log("Cancel Pressed"),
          style: "cancel"
        },
        { text: "OK", onPress: () => console.log("OK Pressed") }
      ],
      {
        cancelable: true,
        onDismiss: () => console.log("Cancelled from outside")
      }
    );
*/

It works in both Android and iOS but there are few distinctions among the Alert dialogs of Android and iOS –

  1. On Android we can have at most 3 buttons in Alert dialog but there is no limit on iOS.
  2. We can dismiss the dialog by clicking outside it in Android, but not in iOS.
  3. iOS provides functionality to show input fields in Alert dialog to capture data from user. No such feature is provided in Android.

Code Example

import React, { useState } from "react";
import { View, StyleSheet, Button, Alert } from "react-native";

const App = () => {
  const createBasicAlert = () => 
    Alert.alert(
      "Alert Title",
    );

  const createOneButtonAlert = () => 
    Alert.alert(
      "Alert Title",
      "This alert has 1 button",
      [
        { text: "OK", onPress: () => console.log("OK Pressed") }
      ]
    );

  const createTwoButtonAlert = () =>
    Alert.alert(
      "Alert Title",
      "This alert has 2 buttons",
      [
        {
          text: "Cancel",
          onPress: () => console.log("Cancel Pressed"),
          style: "cancel"
        },
        { text: "OK", onPress: () => console.log("OK Pressed") }
      ]
    );

  const createThreeButtonAlert = () =>
    Alert.alert(
      "Alert Title",
      "This alert has 3 buttons",
      [
        {
          text: "Ask me later",
          onPress: () => console.log("Ask me later pressed")
        },
        {
          text: "Cancel",
          onPress: () => console.log("Cancel Pressed"),
          style: "cancel"
        },
        { text: "OK", onPress: () => console.log("OK Pressed") }
      ]
    );

  return (
    <View style={styles.container}>
      <Button title={"Only Title Alert"} onPress={createBasicAlert} />
      <Button title={"1-Button Alert"} onPress={createOneButtonAlert} />
      <Button title={"2-Button Alert"} onPress={createTwoButtonAlert} />
      <Button title={"3-Button Alert"} onPress={createThreeButtonAlert} />
    </View>
  );
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    justifyContent: "space-around",
    alignItems: "center"
  }
});

export default App;

Output –

Only title, 1 button, 2 buttons and 3 buttons alert dialogs in iOS react native

This above image shows the Alert dialogs in iOS phones. We have 4 phones and each one is showing a different Alert style –

Alert in React Native Android - only title, 1 button, 2 buttons and 3 buttons

This is the image of Alert dialogs on Android phones. Similar to iOS image, we have 4 different Android phones here and each one is showing alerts differently.

In the code, we have created 4 functions to call alert dialog. Since alert is a static function of Alert class, so we can call it separately from other JSX.

Live Demo

Open Live Demo

Conclusion

Alert dialogs are the critical components of an application. They are not specific to mobile apps, else they are being used from the very beginning of web development. In React Native, we can call it using Alert.alert() function. It accepts title, message, buttons and some optional options.


React Native Series

Alert

  1. Basic Alert
  2. Dismiss on Clicking Outside
  3. Input Fields in Alert Dialog – Prompt()
  4. Dark-Light Theme of Dialog

ActivityIndicator

  1. Basic Circular Loader
  2. Change size of Circular Loader
  3. Show/hide Circular Loader
  4. Change color of Circular Loader

Button

  1. Simple Button
  2. Change Button Color
  3. Disable Button Click
  4. Disable touch sound on Button click

FlatList

  1. Simple List
  2. Single Item Selection from List
  3. Multiple Item Selection from List
  4. Adding separator between list items
  5. Multiple columns List
  6. Showing Message in Empty List
  7. Add Footer to the List
  8. Add Header to the List
  9. Horizontal List
  10. Inverted List
  11. Pull to Refresh in List
  12. Infinite Loading List

SectionList

  1. Section List

ScrollView

  1. ScrollView
  2. Stick Single Item at Header
  3. Stick Multiple Items at Header
  4. Stick Item at Footer
  5. Hide Sticky Element on Scroll

Image

  1. Display Image from remote url
  2. Display local storage image
  3. Display Base64 Image
  4. Display Gif & Webp Images
  5. Adding Blur to Image
  6. Displaying loader for Image
  7. Resizemode for Images
  8. Setting Default Placeholder Image
  9. Background Image

Modal

  1. Basic Modal
  2. Slide from bottom Modal
  3. Fade In Modal
  4. Transparent Overlay Modal

RefreshControl

  1. RefreshControl
  2. Change Refresh Loader Color
  3. Change Refresh Loader Size
  4. Change Refresh Loader Background Color
  5. Title under Refresh Loader
  6. Change color of title under refresh loader

StatusBar

  1. Get StatusBar Size
  2. Change StatusBar Background Color
  3. Display StatusBar icons & text in While Color
  4. Display StatusBar icons & text in Dark Color
  5. Hiding StatusBar
  6. Translucent StatusBar

Switch

  1. Simple Switch
  2. Disable Switch
  3. Change Switch Colors

Text

  1. Adding Text
  2. Bold Text
  3. Italic Text
  4. Underline Text
  5. Selecting Text for copy-paste
  6. Changing Highlight Color of Text Selection
  7. Fit text in View box
  8. Clickable anchors in text
  9. Truncate Lengthy Text

TextInput

  1. Simple Input Field
  2. Auto Capitalize Text in Input Field
  3. Multiline Input Field
  4. Hide Cursor in Input Field
  5. Clear input Field using X
  6. Clear input Field when focused
  7. Change Cursor Color in Input Field
  8. Disable input field
  9. Icon at the left of Input Field
  10. Dark-Light Keyboard
  11. Avoid Overlapping of Keyboard
  12. Limiting Characters in Input Field
  13. Numeric Keyboard
  14. Email Id Keyboard
  15. Phone number Keyboard
  16. Url Keyboard
  17. Placeholder in input field
  18. Placeholder Color in Input Field
  19. Password Input Field
  20. Programmatically select text in Input Field
  21. Change Text Selection Color in Input Field
  22. Select Whole text in Input Field on Focus
  23. Write text from center in input field
  24. Changing underline color of input field

TouchableWithoutFeedback

  1. TouchableWithoutFeedback

TouchableHighlight

  1. TouchableHighlight

TouchableOpacity

  1. TouchableOpacity

Pressable

  1. Pressable
  2. Creating Ripple Effect

Appearance

  1. Dark-Light System Color Scheme

AppState

  1. AppState – Foreground/Background State of App

ToastAndroid

  1. Creating Android Toast Message

Dimensions

  1. Getting Screen & Window Dimensions

Keyboard

  1. Dismiss Keyboard Programmatically

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