Henry Short

Henry Short

1592900280

Highly Configurable Component Imitating Native Bottom Sheet Behavior

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

If you are using Expo, you are done.

If you don’t use Expo, install and link react-native-gesture-handler and react-native-reanimated.

Usage

import BottomSheet from 'reanimated-bottom-sheet'

class Example extends React.Component {
  renderContent = () => (
    /* render */
  )

  renderHeader = () => (
    /* render */
  )

  render() {
    return (
      <View style={styles.container}>
        <BottomSheet
          snapPoints = {[450, 300, 0]}
          renderContent = {this.renderContent}
          renderHeader = {this.renderHeader}
        />
    </View>)
  }
}

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.
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
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.

Download Details:

Author: osdnk

GitHub: https://github.com/osdnk/react-native-reanimated-bottom-sheet

#react-native #react #mobile-apps

What is GEEK

Buddha Community

Highly Configurable Component Imitating Native Bottom Sheet Behavior
Autumn  Blick

Autumn Blick

1598839687

How native is React Native? | React Native vs Native App Development

If you are undertaking a mobile app development for your start-up or enterprise, you are likely wondering whether to use React Native. As a popular development framework, React Native helps you to develop near-native mobile apps. However, you are probably also wondering how close you can get to a native app by using React Native. How native is React Native?

In the article, we discuss the similarities between native mobile development and development using React Native. We also touch upon where they differ and how to bridge the gaps. Read on.

A brief introduction to React Native

Let’s briefly set the context first. We will briefly touch upon what React Native is and how it differs from earlier hybrid frameworks.

React Native is a popular JavaScript framework that Facebook has created. You can use this open-source framework to code natively rendering Android and iOS mobile apps. You can use it to develop web apps too.

Facebook has developed React Native based on React, its JavaScript library. The first release of React Native came in March 2015. At the time of writing this article, the latest stable release of React Native is 0.62.0, and it was released in March 2020.

Although relatively new, React Native has acquired a high degree of popularity. The “Stack Overflow Developer Survey 2019” report identifies it as the 8th most loved framework. Facebook, Walmart, and Bloomberg are some of the top companies that use React Native.

The popularity of React Native comes from its advantages. Some of its advantages are as follows:

  • Performance: It delivers optimal performance.
  • Cross-platform development: You can develop both Android and iOS apps with it. The reuse of code expedites development and reduces costs.
  • UI design: React Native enables you to design simple and responsive UI for your mobile app.
  • 3rd party plugins: This framework supports 3rd party plugins.
  • Developer community: A vibrant community of developers support React Native.

Why React Native is fundamentally different from earlier hybrid frameworks

Are you wondering whether React Native is just another of those hybrid frameworks like Ionic or Cordova? It’s not! React Native is fundamentally different from these earlier hybrid frameworks.

React Native is very close to native. Consider the following aspects as described on the React Native website:

  • Access to many native platforms features: The primitives of React Native render to native platform UI. This means that your React Native app will use many native platform APIs as native apps would do.
  • Near-native user experience: React Native provides several native components, and these are platform agnostic.
  • The ease of accessing native APIs: React Native uses a declarative UI paradigm. This enables React Native to interact easily with native platform APIs since React Native wraps existing native code.

Due to these factors, React Native offers many more advantages compared to those earlier hybrid frameworks. We now review them.

#android app #frontend #ios app #mobile app development #benefits of react native #is react native good for mobile app development #native vs #pros and cons of react native #react mobile development #react native development #react native experience #react native framework #react native ios vs android #react native pros and cons #react native vs android #react native vs native #react native vs native performance #react vs native #why react native #why use react native

Background Fetch for React Native Apps

react-native-background-fetch

Background Fetch is a very simple plugin which attempts to awaken an app in the background about every 15 minutes, providing a short period of background running-time. This plugin will execute your provided callbackFn whenever a background-fetch event occurs.

There is no way to increase the rate which a fetch-event occurs and this plugin sets the rate to the most frequent possible — you will never receive an event faster than 15 minutes. The operating-system will automatically throttle the rate the background-fetch events occur based upon usage patterns. Eg: if user hasn't turned on their phone for a long period of time, fetch events will occur less frequently or if an iOS user disables background refresh they may not happen at all.

:new: Background Fetch now provides a scheduleTask method for scheduling arbitrary "one-shot" or periodic tasks.

iOS

  • There is no way to increase the rate which a fetch-event occurs and this plugin sets the rate to the most frequent possible — you will never receive an event faster than 15 minutes. The operating-system will automatically throttle the rate the background-fetch events occur based upon usage patterns. Eg: if user hasn't turned on their phone for a long period of time, fetch events will occur less frequently.
  • scheduleTask seems only to fire when the device is plugged into power.
  • ⚠️ When your app is terminated, iOS no longer fires events — There is no such thing as stopOnTerminate: false for iOS.
  • iOS can take days before Apple's machine-learning algorithm settles in and begins regularly firing events. Do not sit staring at your logs waiting for an event to fire. If your simulated events work, that's all you need to know that everything is correctly configured.
  • If the user doesn't open your iOS app for long periods of time, iOS will stop firing events.

Android

Installing the plugin

⚠️ If you have a previous version of react-native-background-fetch < 2.7.0 installed into react-native >= 0.60, you should first unlink your previous version as react-native link is no longer required.

$ react-native unlink react-native-background-fetch

With yarn

$ yarn add react-native-background-fetch

With npm

$ npm install --save react-native-background-fetch

Setup Guides

iOS Setup

react-native >= 0.60

Android Setup

react-native >= 0.60

Example

ℹ️ This repo contains its own Example App. See /example

import React from 'react';
import {
  SafeAreaView,
  StyleSheet,
  ScrollView,
  View,
  Text,
  FlatList,
  StatusBar,
} from 'react-native';

import {
  Header,
  Colors
} from 'react-native/Libraries/NewAppScreen';

import BackgroundFetch from "react-native-background-fetch";

class App extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      events: []
    };
  }

  componentDidMount() {
    // Initialize BackgroundFetch ONLY ONCE when component mounts.
    this.initBackgroundFetch();
  }

  async initBackgroundFetch() {
    // BackgroundFetch event handler.
    const onEvent = async (taskId) => {
      console.log('[BackgroundFetch] task: ', taskId);
      // Do your background work...
      await this.addEvent(taskId);
      // IMPORTANT:  You must signal to the OS that your task is complete.
      BackgroundFetch.finish(taskId);
    }

    // Timeout callback is executed when your Task has exceeded its allowed running-time.
    // You must stop what you're doing immediately BackgroundFetch.finish(taskId)
    const onTimeout = async (taskId) => {
      console.warn('[BackgroundFetch] TIMEOUT task: ', taskId);
      BackgroundFetch.finish(taskId);
    }

    // Initialize BackgroundFetch only once when component mounts.
    let status = await BackgroundFetch.configure({minimumFetchInterval: 15}, onEvent, onTimeout);

    console.log('[BackgroundFetch] configure status: ', status);
  }

  // Add a BackgroundFetch event to <FlatList>
  addEvent(taskId) {
    // Simulate a possibly long-running asynchronous task with a Promise.
    return new Promise((resolve, reject) => {
      this.setState(state => ({
        events: [...state.events, {
          taskId: taskId,
          timestamp: (new Date()).toString()
        }]
      }));
      resolve();
    });
  }

  render() {
    return (
      <>
        <StatusBar barStyle="dark-content" />
        <SafeAreaView>
          <ScrollView
            contentInsetAdjustmentBehavior="automatic"
            style={styles.scrollView}>
            <Header />

            <View style={styles.body}>
              <View style={styles.sectionContainer}>
                <Text style={styles.sectionTitle}>BackgroundFetch Demo</Text>
              </View>
            </View>
          </ScrollView>
          <View style={styles.sectionContainer}>
            <FlatList
              data={this.state.events}
              renderItem={({item}) => (<Text>[{item.taskId}]: {item.timestamp}</Text>)}
              keyExtractor={item => item.timestamp}
            />
          </View>
        </SafeAreaView>
      </>
    );
  }
}

const styles = StyleSheet.create({
  scrollView: {
    backgroundColor: Colors.lighter,
  },
  body: {
    backgroundColor: Colors.white,
  },
  sectionContainer: {
    marginTop: 32,
    paddingHorizontal: 24,
  },
  sectionTitle: {
    fontSize: 24,
    fontWeight: '600',
    color: Colors.black,
  },
  sectionDescription: {
    marginTop: 8,
    fontSize: 18,
    fontWeight: '400',
    color: Colors.dark,
  },
});

export default App;

Executing Custom Tasks

In addition to the default background-fetch task defined by BackgroundFetch.configure, you may also execute your own arbitrary "oneshot" or periodic tasks (iOS requires additional Setup Instructions). However, all events will be fired into the Callback provided to BackgroundFetch#configure:

⚠️ iOS:

  • scheduleTask on iOS seems only to run when the device is plugged into power.
  • scheduleTask on iOS are designed for low-priority tasks, such as purging cache files — they tend to be unreliable for mission-critical tasks. scheduleTask will never run as frequently as you want.
  • The default fetch event is much more reliable and fires far more often.
  • scheduleTask on iOS stop when the user terminates the app. There is no such thing as stopOnTerminate: false for iOS.
// Step 1:  Configure BackgroundFetch as usual.
let status = await BackgroundFetch.configure({
  minimumFetchInterval: 15
}, async (taskId) => {  // <-- Event callback
  // This is the fetch-event callback.
  console.log("[BackgroundFetch] taskId: ", taskId);

  // Use a switch statement to route task-handling.
  switch (taskId) {
    case 'com.foo.customtask':
      print("Received custom task");
      break;
    default:
      print("Default fetch task");
  }
  // Finish, providing received taskId.
  BackgroundFetch.finish(taskId);
}, async (taskId) => {  // <-- Task timeout callback
  // This task has exceeded its allowed running-time.
  // You must stop what you're doing and immediately .finish(taskId)
  BackgroundFetch.finish(taskId);
});

// Step 2:  Schedule a custom "oneshot" task "com.foo.customtask" to execute 5000ms from now.
BackgroundFetch.scheduleTask({
  taskId: "com.foo.customtask",
  forceAlarmManager: true,
  delay: 5000  // <-- milliseconds
});

API Documentation

Config

Common Options

@param {Integer} minimumFetchInterval [15]

The minimum interval in minutes to execute background fetch events. Defaults to 15 minutes. Note: Background-fetch events will never occur at a frequency higher than every 15 minutes. Apple uses a secret algorithm to adjust the frequency of fetch events, presumably based upon usage patterns of the app. Fetch events can occur less often than your configured minimumFetchInterval.

@param {Integer} delay (milliseconds)

ℹ️ Valid only for BackgroundFetch.scheduleTask. The minimum number of milliseconds in future that task should execute.

@param {Boolean} periodic [false]

ℹ️ Valid only for BackgroundFetch.scheduleTask. Defaults to false. Set true to execute the task repeatedly. When false, the task will execute just once.

Android Options

@config {Boolean} stopOnTerminate [true]

Set false to continue background-fetch events after user terminates the app. Default to true.

@config {Boolean} startOnBoot [false]

Set true to initiate background-fetch events when the device is rebooted. Defaults to false.

NOTE: startOnBoot requires stopOnTerminate: false.

@config {Boolean} forceAlarmManager [false]

By default, the plugin will use Android's JobScheduler when possible. The JobScheduler API prioritizes for battery-life, throttling task-execution based upon device usage and battery level.

Configuring forceAlarmManager: true will bypass JobScheduler to use Android's older AlarmManager API, resulting in more accurate task-execution at the cost of higher battery usage.

let status = await BackgroundFetch.configure({
  minimumFetchInterval: 15,
  forceAlarmManager: true
}, async (taskId) => {  // <-- Event callback
  console.log("[BackgroundFetch] taskId: ", taskId);
  BackgroundFetch.finish(taskId);
}, async (taskId) => {  // <-- Task timeout callback
  // This task has exceeded its allowed running-time.
  // You must stop what you're doing and immediately .finish(taskId)
  BackgroundFetch.finish(taskId);
});
.
.
.
// And with with #scheduleTask
BackgroundFetch.scheduleTask({
  taskId: 'com.foo.customtask',
  delay: 5000,       // milliseconds
  forceAlarmManager: true,
  periodic: false
});

@config {Boolean} enableHeadless [false]

Set true to enable React Native's Headless JS mechanism, for handling fetch events after app termination.

  • 📂 index.js (MUST BE IN index.js):
import BackgroundFetch from "react-native-background-fetch";

let MyHeadlessTask = async (event) => {
  // Get task id from event {}:
  let taskId = event.taskId;
  let isTimeout = event.timeout;  // <-- true when your background-time has expired.
  if (isTimeout) {
    // This task has exceeded its allowed running-time.
    // You must stop what you're doing immediately finish(taskId)
    console.log('[BackgroundFetch] Headless TIMEOUT:', taskId);
    BackgroundFetch.finish(taskId);
    return;
  }
  console.log('[BackgroundFetch HeadlessTask] start: ', taskId);

  // Perform an example HTTP request.
  // Important:  await asychronous tasks when using HeadlessJS.
  let response = await fetch('https://reactnative.dev/movies.json');
  let responseJson = await response.json();
  console.log('[BackgroundFetch HeadlessTask] response: ', responseJson);

  // Required:  Signal to native code that your task is complete.
  // If you don't do this, your app could be terminated and/or assigned
  // battery-blame for consuming too much time in background.
  BackgroundFetch.finish(taskId);
}

// Register your BackgroundFetch HeadlessTask
BackgroundFetch.registerHeadlessTask(MyHeadlessTask);

@config {integer} requiredNetworkType [BackgroundFetch.NETWORK_TYPE_NONE]

Set basic description of the kind of network your job requires.

If your job doesn't need a network connection, you don't need to use this option as the default value is BackgroundFetch.NETWORK_TYPE_NONE.

NetworkTypeDescription
BackgroundFetch.NETWORK_TYPE_NONEThis job doesn't care about network constraints, either any or none.
BackgroundFetch.NETWORK_TYPE_ANYThis job requires network connectivity.
BackgroundFetch.NETWORK_TYPE_CELLULARThis job requires network connectivity that is a cellular network.
BackgroundFetch.NETWORK_TYPE_UNMETEREDThis job requires network connectivity that is unmetered. Most WiFi networks are unmetered, as in "you can upload as much as you like".
BackgroundFetch.NETWORK_TYPE_NOT_ROAMINGThis job requires network connectivity that is not roaming (being outside the country of origin)

@config {Boolean} requiresBatteryNotLow [false]

Specify that to run this job, the device's battery level must not be low.

This defaults to false. If true, the job will only run when the battery level is not low, which is generally the point where the user is given a "low battery" warning.

@config {Boolean} requiresStorageNotLow [false]

Specify that to run this job, the device's available storage must not be low.

This defaults to false. If true, the job will only run when the device is not in a low storage state, which is generally the point where the user is given a "low storage" warning.

@config {Boolean} requiresCharging [false]

Specify that to run this job, the device must be charging (or be a non-battery-powered device connected to permanent power, such as Android TV devices). This defaults to false.

@config {Boolean} requiresDeviceIdle [false]

When set true, ensure that this job will not run if the device is in active use.

The default state is false: that is, the for the job to be runnable even when someone is interacting with the device.

This state is a loose definition provided by the system. In general, it means that the device is not currently being used interactively, and has not been in use for some time. As such, it is a good time to perform resource heavy jobs. Bear in mind that battery usage will still be attributed to your application, and shown to the user in battery stats.


Methods

Method NameArgumentsReturnsNotes
configure{FetchConfig}, callbackFn, timeoutFnPromise<BackgroundFetchStatus>Configures the plugin's callbackFn and timeoutFn. This callback will fire each time a background-fetch event occurs in addition to events from #scheduleTask. The timeoutFn will be called when the OS reports your task is nearing the end of its allowed background-time.
scheduleTask{TaskConfig}Promise<boolean>Executes a custom task. The task will be executed in the same Callback function provided to #configure.
statuscallbackFnPromise<BackgroundFetchStatus>Your callback will be executed with the current status (Integer) 0: Restricted, 1: Denied, 2: Available. These constants are defined as BackgroundFetch.STATUS_RESTRICTED, BackgroundFetch.STATUS_DENIED, BackgroundFetch.STATUS_AVAILABLE (NOTE: Android will always return STATUS_AVAILABLE)
finishString taskIdVoidYou MUST call this method in your callbackFn provided to #configure in order to signal to the OS that your task is complete. iOS provides only 30s of background-time for a fetch-event -- if you exceed this 30s, iOS will kill your app.
startnonePromise<BackgroundFetchStatus>Start the background-fetch API. Your callbackFn provided to #configure will be executed each time a background-fetch event occurs. NOTE the #configure method automatically calls #start. You do not have to call this method after you #configure the plugin
stop[taskId:String]Promise<boolean>Stop the background-fetch API and all #scheduleTask from firing events. Your callbackFn provided to #configure will no longer be executed. If you provide an optional taskId, only that #scheduleTask will be stopped.

Debugging

iOS

🆕 BGTaskScheduler API for iOS 13+

  • ⚠️ At the time of writing, the new task simulator does not yet work in Simulator; Only real devices.
  • See Apple docs Starting and Terminating Tasks During Development
  • After running your app in XCode, Click the [||] button to initiate a Breakpoint.
  • In the console (lldb), paste the following command (Note: use cursor up/down keys to cycle through previously run commands):
e -l objc -- (void)[[BGTaskScheduler sharedScheduler] _simulateLaunchForTaskWithIdentifier:@"com.transistorsoft.fetch"]
  • Click the [ > ] button to continue. The task will execute and the Callback function provided to BackgroundFetch.configure will receive the event.

Simulating task-timeout events

  • Only the new BGTaskScheduler api supports simulated task-timeout events. To simulate a task-timeout, your fetchCallback must not call BackgroundFetch.finish(taskId):
let status = await BackgroundFetch.configure({
  minimumFetchInterval: 15
}, async (taskId) => {  // <-- Event callback.
  // This is the task callback.
  console.log("[BackgroundFetch] taskId", taskId);
  //BackgroundFetch.finish(taskId); // <-- Disable .finish(taskId) when simulating an iOS task timeout
}, async (taskId) => {  // <-- Event timeout callback
  // This task has exceeded its allowed running-time.
  // You must stop what you're doing and immediately .finish(taskId)
  print("[BackgroundFetch] TIMEOUT taskId:", taskId);
  BackgroundFetch.finish(taskId);
});
  • Now simulate an iOS task timeout as follows, in the same manner as simulating an event above:
e -l objc -- (void)[[BGTaskScheduler sharedScheduler] _simulateExpirationForTaskWithIdentifier:@"com.transistorsoft.fetch"]

Old BackgroundFetch API

  • Simulate background fetch events in XCode using Debug->Simulate Background Fetch
  • iOS can take some hours or even days to start a consistently scheduling background-fetch events since iOS schedules fetch events based upon the user's patterns of activity. If Simulate Background Fetch works, your can be sure that everything is working fine. You just need to wait.

Android

  • Observe plugin logs in $ adb logcat:
$ adb logcat *:S ReactNative:V ReactNativeJS:V TSBackgroundFetch:V
  • Simulate a background-fetch event on a device (insert <your.application.id>) (only works for sdk 21+:
$ adb shell cmd jobscheduler run -f <your.application.id> 999
  • For devices with sdk <21, simulate a "Headless JS" event with (insert <your.application.id>)
$ adb shell am broadcast -a <your.application.id>.event.BACKGROUND_FETCH

Download Details:
Author: transistorsoft
Source Code: https://github.com/transistorsoft/react-native-background-fetch
License: MIT license

#react  #reactnative  #mobileapp  #javascript 

Henry Short

Henry Short

1592900280

Highly Configurable Component Imitating Native Bottom Sheet Behavior

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

If you are using Expo, you are done.

If you don’t use Expo, install and link react-native-gesture-handler and react-native-reanimated.

Usage

import BottomSheet from 'reanimated-bottom-sheet'

class Example extends React.Component {
  renderContent = () => (
    /* render */
  )

  renderHeader = () => (
    /* render */
  )

  render() {
    return (
      <View style={styles.container}>
        <BottomSheet
          snapPoints = {[450, 300, 0]}
          renderContent = {this.renderContent}
          renderHeader = {this.renderHeader}
        />
    </View>)
  }
}

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.
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
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.

Download Details:

Author: osdnk

GitHub: https://github.com/osdnk/react-native-reanimated-bottom-sheet

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