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:-moz-only-whitespace

Non-standard
This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

Note: In Selectors Level 4 the :empty selector was changed to act like :-moz-only-whitespace, but no browsers currently support this yet.

The :-moz-only-whitespace CSS pseudo-class matches elements that have no child nodes at all, or only have empty text nodes or text nodes that have only whitespace in them.

Syntax

Syntax not found in DB!

Example

HTML

<div> </div>

CSS

div {
  border: 4px solid red;
}

:-moz-only-whitespace {
  border-color: lime;
}

Result

Specifications

Briefly defined as :blank in Selectors Level 4, but then the functionality was merged into :empty and :blank redefined to mean empty <input>.

Browser compatibilityUpdate compatibility data on GitHub

	Desktop
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	No	No	Yes Yes See bug 1106296. Uses the non-standard name: `:-moz-only-whitespace`	No	No	No

	Mobile
	Android webview	Chrome for Android	Edge Mobile	Firefox for Android	Opera for Android	iOS Safari	Samsung Internet
Basic support	No	No	No	Yes Yes See bug 1106296. Uses the non-standard name: `:-moz-only-whitespace`	No	No	No