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100ms React Native SDK

📖 Read the Complete Documentation here: https://www.100ms.live/docs/react-native/v2/foundation/basics

🏃 Example App

📲 Download the Example iOS app here: https://testflight.apple.com/join/v4bSIPad

🤖 Download the Example Android app here: https://appdistribution.firebase.dev/i/7b7ab3b30e627c35

To get a better understanding of how the example app is structured, what to do on onJoin, onTrack and onPeer listeners, creating PeerTrackNodes, how to use Redux, and what type of layouts and sorting you can implement in your app, checkout Example App's README

To run the Example app on your system, follow these steps -

  1. In the project root, run npm install
  2. Go to the example folder, cd example
  3. In the example folder, run npm install
  4. To run on Android, run npx react-native run-android
  5. To run on iOS, first install the pods in iOS folder, cd ios; pod install. Then, set the Correct Development Team in Xcode Signing & Capabilities section. Then, in example folder, run npx react-native run-ios

Troubleshooting Guide for resolving issues in running the Example app is available here.

☝️ Minimum Configuration

  • Support for React Native 0.63.4 or above
  • Support for Java 8 or above
  • Support for Android API level 21 or above
  • Xcode 13 or above
  • Support for iOS 12 or above

🤝 Recommended Configuration

  • React Native 0.68.0 or above
  • Java 11 or above
  • Android API level 32 or above
  • Xcode 14 or above
  • iOS 16 or above

📱 Supported Devices

  • The Android SDK supports Android API level 21 and higher. It is built for armeabi-v7a, arm64-v8a, x86, and x86_64 architectures. Devices running Android OS 11 or above is recommended.

  • iPhone & iPads with iOS version 12 or above are supported. Devices running iOS 16 or above is recommended.


npm install @100mslive/react-native-hms --save

📲 Download the Sample iOS App here: https://testflight.apple.com/join/v4bSIPad

🤖 Download the Sample Android App here: https://appdistribution.firebase.dev/i/7b7ab3b30e627c35

More information about Integrating the SDK is available here.

🔐 Permissions

📱 For iOS Permissions

Add following lines in Info.plist file

<string>Please allow access to Camera to enable video conferencing</string>
<string>Please allow access to Microphone to enable video conferencing</string>
<string>Please allow access to network usage to enable video conferencing</string>

🤖 For Android Permissions

Add following permissions in AndroidManifest.xml

<uses-feature android:name="android.hardware.camera.autofocus"/>
<uses-permission android:name="android.permission.CAMERA"/>
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE"/>
<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS"/>
<uses-permission android:name="android.permission.RECORD_AUDIO"/>
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
<uses-permission android:name="android.permission.BLUETOOTH" android:maxSdkVersion="30" />
<uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />

You will also need to request Camera and Record Audio permissions at runtime before you join a call or display a preview. Please follow Android Documentation for runtime permissions.

We suggest using react-native-permission to acquire permissions from both platforms.

More information about Audio Video Permission on iOS & Android is available here.


The package exports all the classes and a HMSSDK class that manages everything.

Setting up the HMS Instance

First invoke the build method which returns an instance of HMSSDK. Save this instance to perform all actions related to 100ms.

import { HMSSDK } from '@100mslive/react-native-hms';

// create HMSSDK instance using the build method & save it for further usage
const hmsInstance = await HMSSDK.build();

Add Event Listeners

Add Event Listeners to get notified about actions happening in the 100ms Room.

The most commonly used Events are onJoin, onPeerUpdate & onTrackUpdate. All the available actions can be found in the HMSUpdateListenerActions class.

The Event Listeners are to be used for handling any update happening in 100ms Room.

const hmsInstance = await HMSSDK.build();

// instance acquired from build() method
  joinSuccess, // function that will be called Joining a Room is successful

The detailed QuickStart Guide is available here.

Join the Room

To interact with peers in audio or video call, the user needs to Join a Room.

When user indicates that they want to join the room, your app should have -

  1. User Name - The name which should be displayed to other peers in the room.

  2. Authentication Token - The Client side Authentication Token generated by the Token Service. Details about how to create Auth Tokens are available here.

Additionally, you can also pass these fields while Joining a Room -

  1. Track Settings - Such as joining a Room with Muted Audio or Video using the HMSTrackSettings object. More information is available here.

  2. Peer Metadata - This can be used to pass any additional metadata associated with the user using metadata of HMSConfig object. For Eg: user-id mapping at the application side. More information is available here.

NOTE: ON_JOIN Event Listener must be attached before calling join function to receive the event callback.

// create HMSSDK instance using the build function
const hmsInstance = await HMSSDK.build();

// You'll need to add Event Listeners for HMSUpdateListenerActions, which are invoked to notify about updates happening in the room like a peer joins/leaves, a track got muted/unmuted, any errors that occur, etc.
hmsInstance.addEventListener(HMSUpdateListenerActions.ON_JOIN, onJoinSuccess);
hmsInstance.addEventListener(HMSUpdateListenerActions.ON_PEER_UPDATE, onPeerUpdate);
hmsInstance.addEventListener(HMSUpdateListenerActions.ON_TRACK_UPDATE, onTrackUpdate);
hmsInstance.addEventListener(HMSUpdateListenerActions.ON_ERROR, onError);

// Next, create an object of HMSConfig class using the available joining configurations.
let config = new HMSConfig({
                    authToken: 'eyJH5c...', // client-side token generated from your token service
                    username: 'John Appleseed',

// Now, we are primed to join the room. All you have to do is calling join by passing the config object

More information about Joining a Room is available here.

Basic Mechanism of using 100ms APIs

For invoking any actions simply use the HMSSDK instance created in above steps. Few common examples of using it are as follows -

// To Mute Audio of local peer - other peers will stop hearing audio

// To Mute Video of local peer - other peers will stop seeing video

// Switch Camera from Front to Back or vice-versa

// Leave the ongoing Room (async function)
await hmsInstance?.leave();

// To send a Chat Message to all peers in Room
await hmsInstance?.sendBroadcastMessage('Hello Everyone! 👋');

More information about using HMSSDK APIs is available here.

Viewing the Video

It all comes down to this. All the setup so far has been done so that we can show Live Streaming Video in our beautiful apps.

100ms React Native SDK provides HmsView component that renders the video on the screen. You can access HmsView from the HMSSDK instance created in above steps.

We simply have to pass a Video Track's trackId to the HmsView to begin automatic rendering of Live Video Stream.

We can also optionally pass props like key, scaleType, mirror to customize the HmsView component.

// get HmsView from the HMSSDK instance created earlier
const HmsView = hmsInstance.HmsView;


const styles = StyleSheet.create({
  hmsView: {
    height: '100%',
    width: '100%',
  • One HmsView component can only be connected with one video trackId. To display multiple videos you have to create multiple instances of HmsView component.

  • It's recommended to always pass the key property while creating HmsView. If a null or undefined trackId is passed in HmsView you will have to unmount and remount with the new trackId. Using the key prop and passing trackId to it automatically achieves this.

  • HmsView component requires width and height in style prop to set bounds of the tile that will show the video stream.

  • Once the requirement of that HmsView is finished it should ALWAYS be disposed.

  • Recommended practice is to show maximum of 3 to 4 HmsView on a single page/screen of the app. This avoids overloading network data consumption & video decoding resources of the device.

More information about Rendering Videos is available here.

Using Track Updates to display Videos

Always use ON_PEER_UPDATE and ON_TRACK_UPDATE listeners, these listeners get updated localPeer and remotePeers whenever there is any event related to these values. The following code snippet shows a simple example of attaching Track Updates Event Listener & using it to show a Video.

// In this example code snippet, We are keeping things very simple.
// You will get an overview of how to render `HMSView`s for list of `trackId`s and how to keep that list up to date.
// We don't need `ON_PEER_UPDATE` event listener for keeping track of only `trackId`s.
// So, we have registered only `ON_TRACK_UPDATE` event listener here

const [trackIds, setTrackIds] = useState<string[]>([]);

const onTrackListener = (data: { peer: HMSPeer; track: HMSTrack; type: HMSTrackUpdate }) => {
  // We will only consider Video tracks for this example
  if (data.track.type !== HMSTrackType.VIDEO) return;

  // If Video track is added, add trackId to our list
  if (data.type === HMSTrackUpdate.TRACK_ADDED) setTrackIds(prevTrackIds => [...prevTrackIds, data.track.trackId]);

  // If Video track is removed, remove trackId from our list
  if (data.type === HMSTrackUpdate.TRACK_REMOVED) setTrackIds(prevTrackIds => prevTrackIds.filter(prevTrackId => prevTrackId !== data.track.trackId));


// Render multiple HMSView for trackIds inside FlatList
// Note: HMSView will render blank if video track of peer is muted, Make sure video of peers is not muted.
  data={trackIds} // trackIds is an array of trackIds of video tracks
  keyExtractor={(trackId) => trackId}
  renderItem={({ item }) => <HMSView key={item} trackId={item} style={{ width: '100%', height: 300 }} {...} />}

More information about Rendering Videos is available here.

🚂 Example Implementations

In the 100ms Example App we have shown how to set up the various listeners, what data to store in Redux and what all features you can implement.

We have also implemented multiple views which are commonly used. Checkout the videos & relevant code in the Example app.

📖 Read the Complete Documentation here: https://www.100ms.live/docs/react-native/v2/foundation/basics


npm i @100mslive/react-native-hms

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