ss="docMainContainer_3ufF"><div class="container padding-vert--lg docItemWrapper_3FMP"><div class="row"><div class="col docItemCol_3FnS"><div class="docItemContainer_33ec"><article><header><h1 class="docTitle_3a4h">Class: MediaStreamTrack</h1></header><div class="markdown"><h2><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_2LWZ" id="hierarchy"></a>Hierarchy<a class="hash-link" href="#hierarchy" title="Ë¶ãÂá∫„Åó„Å∏„ÅÆÁõ¥Êé•„É™„É≥„ÇØ">#</a></h2><ul><l