Is html view supports HTML5?

 

I would like to make a form

 

<form id=payment>
<fieldset>
<legend>Your details</legend>
<ol>
<li>
<label for=name>Name</label>
<input id=name name=name type=text placeholder="First and last name" required autofocus>
</li>
</fieldset>
</form>

 

However, the placeholder is not working in HTML view.

Any suggestion?

 

Will it support HTML5 in near future(within 3 months)?