RTCDataChannel: label property

The read-only RTCDataChannel property label returns a string containing a name describing the data channel. These labels are not required to be unique.

You may use the label as you wish; you could use it to identify all the channels that are being used for the same purpose, by giving them all the same name. Or you could give each channel a unique label for tracking purposes. It's entirely up to the design decisions made when building your site or app.

A unique ID can be found in the {{domxref("RTCDataChannel.id", "id")}} property.

[!NOTE] A data channel's label is set when the channel is created by calling {{domxref("RTCPeerConnection.createDataChannel()")}}. It cannot be changed after that.

Value

A string identifier assigned by the website or app when the data channel was created, as specified when {{domxref("RTCPeerConnection.createDataChannel()")}} was called to create the channel.

Example

This sample creates a data channel on an {{domxref("RTCPeerConnection")}}, then, some time later, sets the content of a UI element to display the channel's name.

const pc = new RTCPeerConnection();
const dc = pc.createDataChannel("my channel");

// …

document.getElementById("channel-name").appendChild(
  Object.assign(document.createElement("span"), {
    className: "channelName",
    textContent: dc.label,
  }),
);

Value

Example

Specifications

Browser compatibility

See also