:placeholder-shown CSS pseudo-class

:placeholder-shown CSS pseudo-class

Input elements can sometimes show placeholder text as a hint to the user on what to type in. See, for example, the placeholder attribute in HTML5. The :placeholder-shown pseudo-class matches an input element that is showing such placeholder text.

Spec http://www.w3.org/TR/selectors4/#placeholder
Status W3C Working Draft
IE Edge Firefox Chrome Safari Opera
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