Web/CSS/ -moz-window-inactive

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.

The :-moz-window-inactive CSS pseudo-class is a Mozilla extension that matches any element while it's in an inactive window.

:-moz-window-inactive works in content HTML documents, too.

Note: Prior to the addition of this pseudo-class, giving different styles to background windows was achieved by setting an attribute (active="true") on the top-level XUL chrome window. This attribute is no longer used.

Syntax

:-moz-window-inactive

Examples

This example alters the appearance of a box's background depending on whether its window is active or not.

HTML

<div id="mybox">
  <p>This is a box!</p>
</div>

CSS

#mybox {
  background: linear-gradient(to bottom, yellow, cyan);
  width: 200px;
  height: 200px;
}

#mybox:-moz-window-inactive {
  background: cyan;
}

Result

The result of this code is shown below. You can view this as a [[../../../../../../mdn.mozillademos.org/en-US/docs/Web/CSS/_-moz-window-inactive%24samples/Examples897a|separate page]] as well.

Specifications

Not part of any standard.

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-window-inactive` Non-standard'	Chrome No support No	Edge No support No	Firefox Full support 4	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android No support No	Firefox Android No support No	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.