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:-moz-submit-invalid

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-submit-invalid CSS pseudo-class represents any submit button on forms whose contents aren't valid based on their validation constraints.

By default, no style is applied. You can use this style to customize the appearance of the submit button when there are invalid form fields.

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support Not supported 4.0 (2) Not supported Not supported Not supported
Feature Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support Not supported 4.0 (2) Not supported Not supported Not supported

See also

© 2005–2017 Mozilla Developer Network and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/CSS/:-moz-submit-invalid