dart"><code class="language-dart">Node get first {
  if (this.length &gt; 0) {
    return JS(&#39;Node&#39;, &#39;#[0]&#39;, this);
  }
  throw new StateError(&quot;No elements&quot;);
}</code></pre>
        </section>
</section>
        
        <section id="setter">
        
        <section class="multi-line-signature">
          <span class="returntype">void</span>
                    <span class="name ">first=</span>
<span class="signature">(<wbr><span class="parameter" id="first=-param-value"><span cl