HTML ID attribute in close tag?

Question

Is this code okay, where I ID a close div:

<html>
<body>
<div id="main">

</div id=main">
</body>
</html>

Polynomial · Accepted Answer

No. The id attribute should only be in the opening tag.

If you're doing this for readability, you might want to use HTML comments and tabified source:

<html>
    <body>
        <div id="main">

        </div>
        <!-- close main div -->
    </body>
</html>

Pekka · Answer

It's invalid: The validator will output

Line x, Column y: End tag had attributes.

If you want to do this to avoid confusion from multiple closing tags, just use a comment to clarify which tag belongs to which element:

</div> <!-- #main -->

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