i/classes/mediastreamtrack">MediaStreamTrack</a></p><h4><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_2LWZ" id="inherited-from-12"></a>Inherited from<a class="hash-link" href="#inherited-from-12" title="Ë¶ãÂá∫„Åó„Å∏„ÅÆÁõ¥Êé•„É™„É≥„ÇØ">#</a></h4><p><a href="/werift-webrtc/website/build/ja/docs/api/classes/eventtarget">EventTarget</a>.<a href="/werift-webrtc/website/build/ja/docs/api/classes/eventtarget#on">on</a></p><h4><a aria-hidden="true" tabinde