`:-moz-window-inactive` CSS pseudo-class

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="my-box">
  <p>This is a box!</p>
</div>

CSS

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

#my-box:-moz-window-inactive {
  background: cyan;
}

Result

The result of this code is shown below. You can view this as a as well.

Specifications

Not part of any standard.

Browser compatibility

	Desktop					Mobile
	Chrome	Edge	Firefox	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on iOS	Samsung Internet	WebView Android	WebView on iOS
`-moz-window-inactive`	No	No	4	No	No	No	No	No	No	No	No	No