BottomSheetBackdrop

A pre-built BottomSheet backdrop implementation with configurable props.

Props

Inherits ViewProps from react-native.

animatedIndex

Current sheet position index.

type	default	required
Animated.SharedValue<number>	0	YES

animatedPosition

Current sheet position.

type	default	required
Animated.SharedValue	0	YES

opacity

Backdrop opacity.

type	default	required
number	0.5	NO

appearsOnIndex

Snap point index when backdrop will appears on.

type	default	required
number	1	NO

disappearsOnIndex

Snap point index when backdrop will disappears on.

type	default	required
number	0	NO

enableTouchThrough

Enable touch through backdrop component.

type	default	required
boolean	false	NO

pressBehavior

What should happen when user press backdrop?

• none: do nothing, and onPress prop will be ignored.
• close: close the sheet.
• collapse: collapse the sheet.
• N: snap point index.

type	default	required
BackdropPressBehavior | number	'close'	NO

onPress

Pressing the backdrop will call the onPress function, it will be called before the action defined by pressBehavior is executed

type	default	required
function	undefined	NO

Example

import React, { useCallback, useMemo, useRef } from "react";
import { View, Text, StyleSheet } from "react-native";
import { GestureHandlerRootView } from 'react-native-gesture-handler';
import BottomSheet, { BottomSheetView, BottomSheetBackdrop } from "@gorhom/bottom-sheet";

const App = () => {
	// ref
	const bottomSheetRef = useRef<BottomSheet>(null);

	// variables
	const snapPoints = useMemo(() => ["25%", "50%", "75%"], []);

	// callbacks
	const handleSheetChanges = useCallback((index: number) => {
		console.log("handleSheetChanges", index);
	}, []);

	// renders
	const renderBackdrop = useCallback(
		(props) => (
			<BottomSheetBackdrop
				{...props}
				disappearsOnIndex={1}
				appearsOnIndex={2}
			/>
		),
		[]
	);
	return (
		<GestureHandlerRootView style={styles.container}>
			<BottomSheet
				ref={bottomSheetRef}
				index={1}
				snapPoints={snapPoints}
				backdropComponent={renderBackdrop}
        enableDynamicSizing={false}
				onChange={handleSheetChanges}
			>
				<BottomSheetView style={styles.contentContainer}>
					<Text>Awesome 🎉</Text>
				</BottomSheetView>
			</BottomSheet>
		</GestureHandlerRootView>
	);
};

const styles = StyleSheet.create({
	container: {
		flex: 1,
		padding: 24,
		backgroundColor: "grey",
	},
	contentContainer: {
		flex: 1,
		alignItems: "center",
	},
});

export default App;