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https://github.com/peers/peerjs
Simple peer-to-peer with WebRTC.
https://github.com/peers/peerjs
browser dataconnection javascript p2p parcel typescript webrtc
Last synced: 3 days ago
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Simple peer-to-peer with WebRTC.
- Host: GitHub
- URL: https://github.com/peers/peerjs
- Owner: peers
- License: mit
- Created: 2012-12-23T07:28:47.000Z (almost 12 years ago)
- Default Branch: master
- Last Pushed: 2024-10-28T13:27:38.000Z (about 1 month ago)
- Last Synced: 2024-10-29T11:19:00.920Z (about 1 month ago)
- Topics: browser, dataconnection, javascript, p2p, parcel, typescript, webrtc
- Language: TypeScript
- Homepage: https://peerjs.com
- Size: 9.86 MB
- Stars: 12,435
- Watchers: 248
- Forks: 1,430
- Open Issues: 189
-
Metadata Files:
- Readme: README.md
- Changelog: CHANGELOG.md
- Funding: .github/FUNDING.yml
- License: LICENSE
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README
# PeerJS: Simple peer-to-peer with WebRTC
[](#backers)
[](#sponsors)
[](https://discord.gg/Ud2PvAtK37)
PeerJS provides a complete, configurable, and easy-to-use peer-to-peer API built on top of WebRTC, supporting both data channels and media streams.
## Live Example
Here's an example application that uses both media and data connections: https://glitch.com/~peerjs-video. The example also uses its own [PeerServer](https://github.com/peers/peerjs-server).
---
Special Announcement:
We now have a Discord Channel
There we plan to discuss roadmaps, feature requests, and more
Join us today
---
## Setup
**Include the library**
with npm:
`npm install peerjs`
with yarn:
`yarn add peerjs`
```js
// The usage -
import { Peer } from "peerjs";
```
**Create a Peer**
```javascript
const peer = new Peer("pick-an-id");
// You can pick your own id or omit the id if you want to get a random one from the server.
```
## Data connections
**Connect**
```javascript
const conn = peer.connect("another-peers-id");
conn.on("open", () => {
conn.send("hi!");
});
```
**Receive**
```javascript
peer.on("connection", (conn) => {
conn.on("data", (data) => {
// Will print 'hi!'
console.log(data);
});
conn.on("open", () => {
conn.send("hello!");
});
});
```
## Media calls
**Call**
```javascript
navigator.mediaDevices.getUserMedia(
{ video: true, audio: true },
(stream) => {
const call = peer.call("another-peers-id", stream);
call.on("stream", (remoteStream) => {
// Show stream in some element.
});
},
(err) => {
console.error("Failed to get local stream", err);
},
);
```
**Answer**
```javascript
peer.on("call", (call) => {
navigator.mediaDevices.getUserMedia(
{ video: true, audio: true },
(stream) => {
call.answer(stream); // Answer the call with an A/V stream.
call.on("stream", (remoteStream) => {
// Show stream in some element.
});
},
(err) => {
console.error("Failed to get local stream", err);
},
);
});
```
## Running tests
```bash
npm test
```
## Browser support
| [
](http://godban.github.io/browsers-support-badges/)
Firefox | [
](http://godban.github.io/browsers-support-badges/)
Chrome | [
](http://godban.github.io/browsers-support-badges/)
Edge | [
](http://godban.github.io/browsers-support-badges/)
Safari |
| ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| 80+ | 83+ | 83+ | 15+ |
We test PeerJS against these versions of Chrome, Edge, Firefox, and Safari with [BrowserStack](https://www.browserstack.com) to ensure compatibility.
It may work in other and older browsers, but we don't officially support them.
Changes to browser support will be a breaking change going forward.
> [!NOTE]
> Firefox 102+ is required for CBOR / MessagePack support.
## FAQ
Q. I have a message `Critical dependency: the request of a dependency is an expression` in browser's console
A. The message occurs when you use PeerJS with Webpack. It is not critical! It relates to Parcel https://github.com/parcel-bundler/parcel/issues/2883 We'll resolve it when updated to Parcel V2.
## Links
### [Documentation / API Reference](https://peerjs.com/docs/)
### [PeerServer](https://github.com/peers/peerjs-server)
### [Discuss PeerJS on our Telegram Channel](https://t.me/joinchat/ENhPuhTvhm8WlIxTjQf7Og)
### [Changelog](https://github.com/peers/peerjs/blob/master/CHANGELOG.md)
## Contributors
This project exists thanks to all the people who contribute.
## Backers
Thank you to all our backers! [[Become a backer](https://opencollective.com/peer#backer)]
## Sponsors
Support this project by becoming a sponsor. Your logo will show up here with a link to your website. [[Become a sponsor](https://opencollective.com/peer#sponsor)]
## License
PeerJS is licensed under the [MIT License](https://tldrlegal.com/l/mit).