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RTCPeerConnection.pendingLocalDescription

The read-only property RTCPeerConnection.pendingLocalDescription returns an RTCSessionDescription object describing a pending configuration change for the local end of the connection. This does not describe the connection as it currently stands, but as it may exist in the near future. Use RTCPeerConnection.currentLocalDescription or RTCPeerConnection.localDescription to get the current state of the endpoint. For details on the difference, see Pending and current descriptions in WebRTC connectivity.

Syntax

sessionDescription = RTCPeerConnection.pendingLocalDescription;

Return value

If a local description change is in progress, this is an RTCSessionDescription describing the proposed configuration. Otherwise, this returns null.

Example

This example looks at the pendingLocalDescription to determine whether or not there's a description change being processed.

var pc = new RTCPeerConnection();
…
var sd = pc.pendingLocalDescription;
if (sd) {
  // There's a description change underway!
}
else {
  // No description change pending
}

Specifications

Browser compatibilityUpdate compatibility data on GitHub

Desktop
Chrome Edge Firefox Internet Explorer Opera Safari
Basic support 56 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 Yes 44 43
43
Promise based version.
37 — 43
? 6.0

The addition of pendingLocalDescription and currentLocalDescription to the WebRTC spec is relatively recent. In browsers which don't support them, only localDescription is available.

See also

© 2005–2018 Mozilla Developer Network and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/RTCPeerConnection/pendingLocalDescription