title: HTML5 input box with type="number" does not accept comma in Chrome browser
body: <p>I am using a HTML5 input box with <code>type="number"</code>. Regarding to some documentations, it should be possible to enter a number with comma (not with period) if I also use the <code>lang=""</code> attribute. It is working in Firefox, but not in Chrome (does not accept a comma). How can I get Chrome to accept the comma in the input box. 
  My problem is that our German users expect that they can enter a comma instead of a period there.</p>
  
  <p><a href="https://jsfiddle.net/byte2702/y3Lpfw7m/" rel="noreferrer">https://jsfiddle.net/byte2702/y3Lpfw7m/</a> </p>
  
  <pre><code>Please enter a number with comma: &lt;br/&gt;
  &lt;input id="num" type="number" step="any" lang="de" pattern="-?[0-9]+[\,.]*[0-9]+" /&gt; 
  </code></pre>