Tweet Button Not Valid XHTML

[BG]

Hello,

I hope this is the right place to post this but I have found an issue
when using the Tweet button on my website. I use the custom version.

When I run it through the W3C Validator I get these errors and I have
tried Doctype variations but they all don't validate.

there is no attribute "data-url"

there is no attribute "data-count"

there is no attribute "data-text"

there is no attribute "data-via"

I make my websites to validate for a number of reasons and they are
usually 100% valid but with the tweet button they won't validate
anymore. I'm surprised at this as I thought the developers would have
made sure the button validates before anything!

[Tom van der Woerdt]

These attributes are HTML5 attributes, not XHTML attributes.

Tom

[Rbeuque74]

It could be great to have a 100% valid XHTML1.0Strict tweet button,
because I want all my website pass w3c check, and now it's broken ...

[Matt Harris]

The data-* attributes were introduced in HTML5, and will cause the W3C Validators to error if your webpage doctype isn't HTML5. For the Tweet Button to be XHTML compatible you have to use the Query String format instead of the data attributes. 

For example instead of:

<script src="http://platform.twitter.com/widgets.js" type="text/javascript"></script>

<a href="http://twitter.com/share" data-url="http://dev.twitter.com" data-via="twitterapi">Tweet</a>

Use:

<script src="http://platform.twitter.com/widgets.js" type="text/javascript"></script>

<div>

    <a href="http://twitter.com/share?url=http%3A%2F%2Fdev.twitter.com&amp;via=twitterapi">Tweet</a>

</div>

Best,
@themattharris
Developer Advocate, Twitter
http://twitter.com/themattharris

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