What is the Alert API in React Native?

The Alert API displays native platform alert dialogs — iOS alert sheets and Android dialog boxes. It provides simple yes/no confirmations and multi-button dialogs using the platform's native UI. Simple alert: import { Alert } from "react-native"; Alert.alert("Title", "Message body"); // OK button automatically. Confirm dialog: Alert.alert( "Delete Item", "Are you sure you want to delete this?", [ { text: "Cancel", style: "cancel", // styled as cancel action onPress: () => console.log("Cancelled"), }, { text: "Delete", style: "destructive", // red on iOS onPress: () => deleteItem(), }, ] );. Alert.prompt (iOS only): alert with a text input field — not available on Android: Alert.prompt( "Enter Name", "Please enter your name:", [ { text: "Cancel", style: "cancel" }, { text: "OK", onPress: name => console.log("Name:", name) } ], "plain-text", "Default Value" );. Button styles: "default" (normal), "cancel" (bold on iOS), "destructive" (red on iOS). Limitations: Alert is platform-native — appearance differs between iOS and Android; can't heavily customize the UI; for custom styled dialogs, use the Modal component or react-native-modal library. Blocking: Alert is non-blocking — the callback fires asynchronously. The JS thread continues after Alert.alert() is called.