html - HTML5 - Can I use Width and Height in IMG?

Question

It is Legal to use this code:

<img src="...(here image)...." width="50px" height="50px" />

Or I need to use:

<img src="...(here image)..." style="width: 50px; height: 50px;" />

Answer 1

First use is recommended as hints for the browser's rendering, second one works.

In the first form you must not add 'px'.

http://www.w3.org/TR/html5/embedded-content-0.html#dimension-attributes