:blank

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

Note: The :blank selector is considered at risk, as the CSSWG keeps changing it.

See CSSWG issue #1967.

The :blank CSS pseudo-class selects empty user input elements (e.g. <input> or <textarea>).

Syntax

css

:blank {
  /* ... */
}

In eventual supporting browsers, the :blank pseudo-class will enable developers to highlight in some way input controls that are not required, but still have no content filled in, perhaps as a reminder to users.

HTML

html

<textarea></textarea>

CSS

css

textarea:blank {
  border: 3px solid red;
}

Result

Specifications

Specification
Selectors Level 4 # blank-pseudo

Browser compatibility

Currently, no browsers have implemented this feature.