ty①">priority</a></code> member.</p>
   </dl>
   <h2 class="heading settled" data-level="4" id="datachannel"><span class="secno">4. </span><span class="content">Extensions for RTCDataChannel</span><a class="self-link" href="#datachannel"></a></h2>
<pre class="idl highlight def"><c- b>partial</c-> <c- b>interface</c-> <a class="idl-code" data-link-type="interface" href="https://w3c.github.io/webrtc-pc/#dom-rtcdatachannel" id="ref-for-dom-rtcdatachannel"><c- g>RTCDataChannel</c-></a> {
  <c- b>readonly</c->