title: What does <meta http-equiv="X-UA-Compatible" content="IE=edge"> do?
body: <p>What's the difference if one web page starts with</p>
  
  <pre><code>&lt;!DOCTYPE html&gt; 
  &lt;html&gt; 
    &lt;head&gt; 
      &lt;meta http-equiv="X-UA-Compatible" content="IE=edge"&gt; 
  </code></pre>
  
  <p>and If page starts with</p>
  
  <pre><code>&lt;!DOCTYPE html&gt; 
  &lt;html&gt; 
    &lt;head&gt; 
       &lt;!-- without X-UA-Compatible meta --&gt;
  </code></pre>
  
  <p>If there is no difference, I suppose I can just ignore the <code>X-UA-Compatible</code> meta header, since I just want it to be rendered in most standard mode in all IE versions.</p>