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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 browser currently supports this yet.

The :-moz-only-whitespace CSS pseudo-class matches elements that only contains text nodes that only contain whitespace. (This includes elements with empty text nodes and elements with no child nodes.)

Syntax

Syntax not found in DB!

Examples

Simple :-moz-only-whitespace 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
:-moz-only-whitespace No No 1
1
See bug 1106296.
No No No
Mobile
Android webview Chrome for Android Firefox for Android Opera for Android Safari on iOS Samsung Internet
:-moz-only-whitespace No No 4
4
See bug 1106296.
No No No

See also

© 2005–2020 Mozilla and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/CSS/:-moz-only-whitespace