This guide will show you the basic concepts of the PeerJS API. If you learn better from seeing a working app, see the examples page. You can use ours for now, but you should sign up for your own free key PeerJS binary PeerServer for session metadata and candidate signaling. Optionally, you can pass in your own IDs to the Peer constructor. Read the Peer API reference for complete information on its optionsmethods, eventsand error handling. When a peer calls you, the call event is emitted. When answering a call, the MediaStream is optional and if none is provided then a one-way call is established. Once the call is established, its open property is set to true. PeerJS has the BinaryPack serialization format built-in. This means you can send any JSON type as well as binary Blobs and ArrayBuffers. A small percentage of users are behind symmetric NATs. When two symmetric NAT users try to connect to each other, NAT traversal is impossible and no connection can be made. A workaround is to proxy through the connection through a TURN server. The PeerServer cloud service does not provide a TURN api. You can pass a TURN server into the Api object options. We keep an frequently-updated catalogue of WebRTC compatibility information and caveats here. When you try to connect to a peer, PeerServer will hold a connection offer for up to 5 seconds before rejecting it. This is useful if you want to reconnect to a peer as it disconnects and reconnects rapidly between web pages. Another possible issue is your network blocking portwhich the PeerServer cloud runs on. In this you must use your own PeerServer running on an appropriate port instead of the cloud service. Data sent between the two peers do not touch any other servers, so the connection speed is limited only by the upload and download rates of the two peers. The latency to establish a connection can be split into two components the brokering of data and the identification of clients. PeerJS has been designed to minimize the time you spend in these two areas. For brokering, data is sent through an XHR streaming request before a WebSocket connection is established, then through WebSockets. For client identification, we provide you the ability to pass in your own peer IDs, thus eliminating the RTT for retrieving an ID from the server. Discuss PeerJS on our Google Group Other peers can connect to this peer using the provided ID. If no ID is given, one will be generated by the brokering server. API key for the cloud PeerServer. PeerServer cloud runs on port Please ensure it is not blocked or consider running your own PeerServer instead. The path where your self-hosted PeerServer is running. Note that our cloud-hosted server and assets may not support SSL. Configuration hash passed to RTCPeerConnection. Defaults to Connects to the remote peer specified by id and returns a data connection. Be sure to listen on the error event in case the connection fails. If left unspecified, a label will be generated at random. Metadata associated with the connection, passed in by whoever initiated the connection. Can be any serializable type. Can be binary defaultbinary-utf8jsonor none. Whether the underlying data channels should be reliable e. Setting reliable to true will use a shim for incompatible browsers Chrome 30 and below only and thus may not offer full performance. Calls the remote peer specified by id and returns a media connection. Emitted when a api to the PeerServer is established. You may use the peer before this is emitted, options messages to the server will be queued. You should not wait for this event before connecting to other peers if connection speed is important. Emitted when a remote peer attempts to call you. Emitted when the peer is destroyed and can no longer accept or create any new connections. Emitted when the peer is disconnected from the signalling server, either manually or because the connection to the signalling server was lost. When a peer is disconnected, its existing connections will stay alive, but the peer cannot accept or create any new connections. Errors from the underlying socket and PeerConnections are forwarded here. The API key passed into the Peer constructor contains illegal characters or is not in the system cloud server only. PeerJS is options used securely, but the cloud server does not support SSL. Use a custom PeerServer. The ID passed into the Peer constructor is already taken. This error is not fatal if your peer has open peer-to-peer connections. This can happen if you attempt to reconnect a peer that has been disconnected from the serverbut its old ID has now been taken. Close the connection to the server, leaving all existing data and media connections intact. This cannot be undone; the respective peer object will no longer be able to create or receive any connections and its ID will be forfeited on the cloud server. Only disconnected peers can be reconnected. Destroyed peers cannot be reconnected. Close the connection to the server and terminate all existing connections. This cannot be undone; the respective peer object will no longer be able to create or receive any connections, its ID will be forfeited on the cloud server, and all of its data and media connections will be closed. The brokering ID of this peer. If no ID was specified in the constructorthis will be undefined until the open event is emitted. We recommend keeping track of binary yourself rather than relying on this hash. Closes the data connection gracefully, cleaning up underlying DataChannels and PeerConnections. Emitted when either you or the remote peer closes the data connection. Firefox does not yet support this event. The optional label passed in or assigned by PeerJS when the connection was initiated. Any type of metadata associated with the connection, passed in by whoever initiated the connection. Whether the underlying data channels are reliable; defined when the connection was initiated. The serialization format of the data sent over the connection. The number of messages queued to be sent once the browser buffer is no longer full. When recieving a call event on a peer, you can call. A WebRTC media stream from getUserMedia. Emitted when either you or the remote peer closes the media connection. Whether the binary connection is active e. You can check this if you want to set a maximum wait time for a one-sided call. Provides a variety of helpful utilities. Only the utilities documented here are guaranteed to be present on util. Undocumented utilities can be removed without warning. This property can be useful in determining whether or not two peers can connect. For example, as of now data connections are not yet interoperable between major browsers. A hash of WebRTC features mapped to booleans that correspond to whether the feature is supported by the current browser. PeerServer cloud runs on port Please ensure it is not blocked or consider running your own PeerServer instead host string Server host. Defaults to path string The path where your self-hosted PeerServer is running. Note that our cloud-hosted server and assets may not support SSL config object Configuration hash passed to RTCPeerConnection. Can be any serializable options serialization string Can be binary defaultbinary-utf8jsonor none.
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