how to mix links ( <a> tag ) and headings ( <h1> tag ) in web standard?

Question

What is the correct code to create a link with heading 1 according to web standards?

is it

<h1><a href="http://stackoverflow.com"> stackoverflow </a></h1>

or

<a href="http://stackoverflow.com"><h1> stackoverflow </h1></a>

Thanks

Answer 1

According to web standards you aren't allowed to put block elements into inline elements.

As h1 is a block element and a is an inline element the correct way is:

<h1><a href="#">This is a title</a></h1>

Here is a link so you can learn more: w3 Visual formatting model

However, there is an exception that in HTML5 it is valid to wrap block-level elements (like div, p or h*) in anchor tags. Wrapping block-level elements in inline elements other than anchors still goes against the standards.