TIL that an <input> inside a <button> is admonished, but not banned by the spec 
http://www.w3.org/TR/html-markup/input.text.html#input.text-constraints …pic.twitter.com/kwz95CRoOL
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@slightlylate @notwaldorf @Vintharas HTML5 usually says what the browser must do if the author violates a "must not". Authors <3 doing that.
@jyasskin @slightlylate @Vintharas anyway spec writing is hard and spec writers deserve 


. I just perma-grumble about input like a jerk.
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