Reanimated Bottom Sheet

Highly configurable component imitating native bottom sheet behavior, with fully native 60 FPS animations!

Built from scratch with react-native-gesture-handler and react-native-reanimated.

Usable with Expo with no extra native dependencies!

Installation

Open a Terminal in the project root and run:

yarn add reanimated-bottom-sheet

Or if you use npm:

npm install reanimated-bottom-sheet

Now we need to install react-native-gesture-handler and react-native-reanimated.

If you are using Expo, to ensure that you get the compatible versions of the libraries, run:

expo install react-native-gesture-handler react-native-reanimated

If you are not using Expo, run the following:

yarn add react-native-reanimated react-native-gesture-handler

Or if you use npm:

npm install react-native-reanimated react-native-gesture-handler

We're done! Now you can build and run the app on your device/simulator.

Usage

import * as React from 'react';
import { StyleSheet, Text, View, Button } from 'react-native';
import Animated from 'react-native-reanimated';
import BottomSheet from 'reanimated-bottom-sheet';

export default function App() {
  const renderContent = () => (
    <View
      style={{
        backgroundColor: 'white',
        padding: 16,
        height: 450,
      }}
    >
      <Text>Swipe down to close</Text>
    </View>
  );

  const sheetRef = React.useRef(null);

  return (
    <>
      <View
        style={{
          flex: 1,
          backgroundColor: 'papayawhip',
          alignItems: 'center',
          justifyContent: 'center',
        }}
      >
        <Button
          title="Open Bottom Sheet"
          onPress={() => sheetRef.current.snapTo(0)}
        />
      </View>
      <BottomSheet
        ref={sheetRef}
        snapPoints={[450, 300, 0]}
        borderRadius={10}
        renderContent={renderContent}
      />
    </>
  );
}

Props

name	required	default	description
snapPoints	yes		E.g. [300, 200, 0]. Points for snapping of bottom sheet coomponent. They define distance from bottom of the screen. Might be number or percent (as string e.g. '20%') for points or percents of screen height from bottom. Note: Array values must be in descending order.
initialSnap	no	0	Determines initial snap point of bottom sheet. The value is the index from snapPoints.
renderContent	no		Method for rendering scrollable content of bottom sheet.
renderHeader	no		Method for rendering non-scrollable header of bottom sheet.
enabledGestureInteraction	no	true	Defines if bottom sheet could be scrollable by gesture.
enabledHeaderGestureInteraction	no	true	Defines if bottom sheet header could be scrollable by gesture.
enabledContentGestureInteraction	no	true	Defines if bottom sheet content could be scrollable by gesture.
enabledContentTapInteraction	no	true	Defines whether bottom sheet content could be tapped. Note: If you use Touchable* components inside your renderContent, you'll have to switch this to false to make handlers like onPress work. (See this comment.)
enabledManualSnapping	no	true	If false blocks snapping using snapTo method.
enabledBottomClamp	no	false	If true block movement is clamped from bottom to minimal snapPoint.
enabledBottomInitialAnimation	no	false	If true sheet will grows up from bottom to initial snapPoint.
enabledInnerScrolling	no	true	Defines whether it's possible to scroll inner content of bottom sheet.
callbackNode	no		reanimated node which holds position of bottom sheet, where 0 it the highest snap point and 1 is the lowest.
contentPosition	no		reanimated node which holds position of bottom sheet's content (in dp)
headerPosition	no		reanimated node which holds position of bottom sheet's header (in dp)
overdragResistanceFactor	no	0	`Defines how violently sheet has to stopped while overdragging. 0 means no overdrag
springConfig	no	{ }	Overrides config for spring animation
innerGestureHandlerRefs	no		Refs for gesture handlers used for building bottom sheet. The array consists fo three refs. The first for PanGH used for inner content scrolling. The second for PanGH used for header. The third for TapGH used for stopping scrolling the content.
simultaneousHandlers	no		Accepts a react ref object or an array of refs to handler components.
onOpenStart	no		Accepts a function to be called when the bottom sheet starts to open.
onOpenEnd	no		Accepts a function to be called when the bottom sheet is almost fully openned.
onCloseStart	no		Accepts a function to be called when the bottom sheet starts to close.
onCloseEnd	no		Accepts a function to be called when the bottom sheet is almost closing.
callbackThreshold	no	0.01	Accepts a float value from 0 to 1 indicating the percentage (of the gesture movement) when the callbacks are gonna be called.
borderRadius	no		Border radius of content wrapper (excluding header)

Methods

snapTo(index)

Imperative method on for snapping to snap point in given index. E.g.

// Snap to the snap point at index 0 (e.g. 450 in [450, 300, 0])
this.bottomSheetRef.current.snapTo(0)

Here this.bottomSheetRef refers to the ref passed to the BottomSheet component.

Example

More complex examples can be found in the Example folder. To view the examples in the Expo app, open a Terminal and run:

yarn
yarn prepare
cd Example
yarn
expo start

The example app is also available on Expo.

Todo

It's not finished and some work has to be done yet.

1. Play with magic config values
2. Horizontal mode
3. Deal with GH in inner scrollView
4. Cleanup code (e.g. measuring of components)

Contributing

Publishing a release

We use release-it to automate our release. If you have publish access to the NPM package, run the following from the master branch to publish a new release:

yarn release

NOTE: You must have a GITHUB_TOKEN environment variable available. You can create a GitHub access token with the "repo" access here.