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RTCPeerConnection.constructor

The RTCPeerConnection() constructor returns a newly-created RTCPeerConnection, which represents a connection between the local device and a remote peer.

Syntax

pc = new RTCPeerConnection([configuration]);

Parameters

configuration Optional: An RTCConfiguration dictionary providing options to configure the new connection.

RTCConfiguration dictionary

bundlePolicy Optional: Specifies how to handle negotiation of candidates when the remote peer is not compatible with the SDP BUNDLE standard. This must be one of the values from the enum RTCBundlePolicy. If this value isn't included in the dictionary, "balanced" is assumed.
certificates Optional: An Array of objects of type RTCCertificate which are used by the connection for authentication. If this property isn't specified, a set of certificates is generated automatically for each RTCPeerConnection instance. Although only one certificate is used by a given connection, providing certificates for multiple algorithms may improve the odds of successfully connecting in some circumstances. See Using certificates below for additional information.
This configuration option cannot be changed after it is first specified; once the certificates have been set, this property is ignored in future calls to RTCPeerConnection.setConfiguration().
iceCandidatePoolSize Optional: An unsigned 16-bit integer value which specifies the size of the prefetched ICE candidate pool. The default value is 0 (meaning no candidate prefetching will occur). You may find in some cases that connections can be established more quickly by allowing the ICE agent to start fetching ICE candidates before you start trying to connect, so that they're already available for inspection when RTCPeerConnection.setLocalDescription() is called.
Changing the size of the ICE candidate pool may trigger the beginning of ICE gathering.
iceServers Optional: An array of RTCIceServer objects, each describing one server which may be used by the ICE agent; these are typically STUN and/or TURN servers. If this isn't specified, the ICE agent may choose to use its own ICE servers; otherwise, the connection attempt will be made with no STUN or TURN server available, which limits the connection to local peers.
iceTransportPolicy Optional: The current ICE transport policy; this must be one of the values from the RTCIceTransportPolicy enum. If this isn't specified, "all" is assumed.
peerIdentity Optional: A DOMString which specifies the target peer identity for the RTCPeerConnection. If this value is set (it defaults to null), the RTCPeerConnection will not connect to a remote peer unless it can successfully authenticate with the given name.
rtcpMuxPolicy Optional: The RTCP mux policy to use when gathering ICE candidates, in order to support non-multiplexed RTCP. The value must be one of those from the RTCRtcpMuxPolicy enum. The default is "require".

Return value

A newly-created RTCPeerConnection object, configured as described by configuration, if specified; otherwise, configured to appropriate basic defaults.

Specifications

Specification	Status	Comment
WebRTC 1.0: Real-time Communication Between Browsers The definition of 'RTCPeerConnection()' in that specification.	Candidate Recommendation	Initial definition.

Browser compatibilityUpdate compatibility data on GitHub

	Desktop
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	56 56 Before Chrome 63 the default value for the `RTCConfiguration.rtcpMuxPolicy` parameter was `"negotiate&quot`	Yes	22	?	43 43 Promise based version. 37 — 43	?

	Mobile
	Android webview	Chrome for Android	Edge Mobile	Firefox for Android	Opera for Android	iOS Safari	Samsung Internet
Basic support	56 56 Before Chrome 63 the default value for the `RTCConfiguration.rtcpMuxPolicy` parameter was `"negotiate&quot`	56 56 Before Chrome 63 the default value for the `RTCConfiguration.rtcpMuxPolicy` parameter was `"negotiate&quot`	Yes	44	43 43 Promise based version. 37 — 43	?	6.0