:-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.

Summary

The :-moz-only-whitespace CSS pseudo-class matches an element that has no child nodes at all or empty text nodes or text nodes that have only white-space in them. Only when there are element nodes or text nodes with one or more characters inside the element, the element doesn't match this pseudo-class anymore.

Syntax

span:-moz-only-whitespace { style properties }

Example

CSS

span:-moz-only-whitespace::before {
  background-color: lime;
}

HTML

<span> </span>

Document Tags and Contributors

 Contributors to this page: Sebastianz, teoli, Sheppy, ethertank, Marsf, Fredchat, Mw22
 Last updated by: Sebastianz,