Web/CSS/ -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 compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`:-moz-only-whitespace` Non-standard'	Chrome No support No	Edge No support No	Firefox Full support 1 Notes' Full support 1 Notes' Notes' See bug 1106296.	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android No support No	Firefox Android Full support 4 Notes' Full support 4 Notes' Notes' See bug 1106296.	Opera Android No support No	Safari iOS No support No	Samsung Internet Android No support No

Legend

Full support: Full support
No support: No support
Non-standard. Expect poor cross-browser support.': Non-standard. Expect poor cross-browser support.
See implementation notes.': See implementation notes.