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    This is an experimental technology
    Because this technology's specification has not stabilized, check the compatibility table for the proper prefixes to use in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the spec changes.

    The read-only property RTCPeerConnection.localDescription returns a RTCSessionDescription describing the session for the local end of the connection. If it has not yet been set, it can be null.


     var sessionDescription = peerConnection.localDescription;


    var pc = new RTCPeerConnection();
    var sd = pc.localDescription;
    if (sd) {
      alert("Local session: type='" +         
            sd.type + "'; sdp description='" +
            sd.sdp + "'");
    else {
      alert("No local session yet.");


    Specification Status Comment
    WebRTC 1.0: Real-time Communication Between Browser
    The definition of 'RTCPeerConnection.localDescription' in that specification.
    Working Draft Initial specification.

    Browser compatibility

    Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
    Basic support (Yes) [1] (Yes) [1] Not supported (Yes) ?
    Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
    Basic support ? ? ? Not supported ? ?

    [1] Though this property is not prefixed, the interface it belongs to is.

    See also

    Document Tags and Contributors

    Contributors to this page: teoli
    Last updated by: teoli,