Adding special characters to number input
<p>I'm trying to create a HTML duration(not time of day) input field, ie HH:MM, and I would like it to trigger the numeric keyboard on mobile devices.</p>

<p><code>&lt;input type="number" /&gt;</code> appears to be the only reliable way to make this happen. But I require it to accept colons <code>:</code>. </p>

<p>Is there a way to force the number input field accept additional special characters?</p>