: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.
Date and time input types
Form field widgets to easily allow users to enter a date, time or both, generally by using a calendar/time input widget. Refers to supporting the following input types: `date`, `time`, `datetime-local`, `month` & `week`.
htmlinputelement api: showpicker: `datetime-local` input
htmlinputelement api: showpicker: `time` input
layoutshift api: lastinputtime
html element: input: `type="datetime-local"`
html element: input: `type="time"`
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