title: Get HTML element via aria label
body: <p>I'm making a small chrome extension and for it I need to grab a <code>div</code> from the DOM to manipulate. I get the DOM but I'm having trouble grabbing the required <code>div</code>. Here's the code for it. </p>
  
  <pre><code>&lt;div id=":ik" class="Am Al editable LW-avf" hidefocus="true" aria-label="Message Body" g_editable="true" role="textbox" contenteditable="true" tabindex="1" style="direction: ltr; min-height: 137px;"&gt;&lt;br&gt;&lt;/div&gt;
  </code></pre>
  
  <p>I've tried <code>getElemenyByID</code>, and <code>document.attrib</code> but both return <code>null</code>. Any advice on how to get the value of the text that will be input inside this <code>div</code>? </p>