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

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 separate page as well.

Specifications

Not part of any standard.

Browser compatibility

See also

• Mozilla CSS extensions

• Related CSS selectors:

  • :active

• The activeElement property for regular DOM, and the activeElement property for shadow DOM roots.