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Getting Started with Mobile App Development with React Native

Alert

Learn how to use the Alert API to show pop-up messages in React Native applications.

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The Alert API is used to show essential information and warning messages to users. It can also be used to interrupt a user and ask them for a final confirmation of their decision before proceeding. For example, the Alert API can be displayed to show a warning message if the user is about to delete a system-related file.

Usage

To implement and use the Alert API, we first have to import it from the react-native library.

JavaScript (JSX)
import { Alert } from 'react-native';

Once the Alert API has been imported, we can use it inside our application using the alert method of the Alert API.

JavaScript (JSX)
import React from "react";
import { SafeAreaView, Button, Alert } from "react-native";
const App = () => {
  return (
    <SafeAreaView>
      <Button
        title = 'Click me'
        onPress={() => Alert.alert('Hello World')}
      />
    </SafeAreaView>
  );
};
export default App;

Customizing alerts

We ...