ref="dart-async/Stream-class.html">Stream</a><span class="signature">&lt;<wbr><span class="type-parameter"><a href="dart-html/ProgressEvent-class.html">ProgressEvent</a></span>&gt;</span></span>
                  <span class="name ">onLoadStart</span>
          
</section>
        
                <section class="desc markdown">
          <p>Stream of <code>loadstart</code> events handled by this <a href="dart-html/FileReader-class.html">FileReader</a>.</p>
        </section>
                <section class=