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-ui-invalid CSS pseudo-class represents any validated form element whose value isn't valid based on their validation constraints, in certain circumstances. This pseudo-class is applied according to the following rules:

  • If the control does not have focus, and the value is invalid, apply this pseudo-class.
  • If the control has focus, and the value was valid (including empty) when it gained focus, do not apply the pseudo-class.
  • If the control has focus, and the value was invalid when it gained focus, re-validate on every keystroke.
  • If the element is required, the preceding rules apply only if the user has changed the value or attempted to submit the form.

The result is that if the control was valid when the user started interacting with it, the validity styling is changed only when the user shifts focus to another control. However, if the user is trying to correct a previously-flagged value, the control shows immediately when the value becomes valid. Required items have the pseudo-class applied only if the user changes them or attempts to submit an unchanged valid value.

By default, Gecko applies a style that creates a red "glow" (using the box-shadow property) around items, which have this pseudo-class applied. See the :invalid pseudo-class for an example that shows how to override the default style.

Syntax

Syntax not found in DB!

Specifications

Not part of any specification.

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
Basic support
Non-standard
Chrome No support NoEdge No support NoFirefox Full support 4IE No support NoOpera No support NoSafari No support NoWebView Android No support NoChrome Android No support NoEdge Mobile No support NoFirefox Android ? Opera Android No support NoSafari iOS No support NoSamsung Internet Android No support No

Legend

Full support  
Full support
No support  
No support
Compatibility unknown  
Compatibility unknown
Non-standard. Expect poor cross-browser support.
Non-standard. Expect poor cross-browser support.

See also

Document Tags and Contributors

Contributors to this page: ExE-Boss, teoli, mfluehr, Sebastianz, fscholz, Sheppy, alanh, jswisher
Last updated by: ExE-Boss,