title: Input readonly backspace issue
body: <p>In my <code>input</code> element, when I navigate to the element and enter the backspace key using keyboard, it navigates to the previous page, when I set the input is <code>readonly</code>. </p>
  
  <p>My code is below. Please share your knowledge.</p>
  
  <pre><code>&lt;div class="div1"&gt;
      &lt;label class="div1" for="inputfor"&gt;cash:&lt;/label&gt;
      &lt;input type="text" id="cashinput" readonly="readonly" /&gt;
  &lt;/div&gt;
  </code></pre>