title: Javascript insertAdjacentHTML not working
body: <p>In fiddle - <a href="http://jsfiddle.net/u3bmytnL/" rel="nofollow">http://jsfiddle.net/u3bmytnL/</a>, does not work as expected</p>
  
  <pre><code>var x = document.createElement("button");
  x.textContent = "byyyyy";
  elx = document.getElementById("el");
  elx.insertAdjacentHTML('afterend', x); 
  </code></pre>