The id attribute got more classy in HTML5 · Mathias Bynens
One of the more subtle yet awesome changes that HTML5 brings, applies to the id attribute. I already tweeted about this a few months ago, but I think this is interesting enough to write about in more than 140 characters. How id differs in between HTML 4.01 and HTML5 The HTML 4.01 spec states that ID tokens must begin with a letter ([A-Za-z]) and may be followed by any number of letters, digits ([0
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