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-focusring
CSS pseudo-class is a Mozilla extension that is similar to the :focus
pseudo-class, but it only matches an element if it's currently focused and a focus ring or other indicator should be drawn around it.
If :-moz-focusring
matches, then :focus
also matches, but the converse is not always true: it depends on whether the user agent has focus ring drawing enabled and how the element was focused. Whether the user agent has focus ring drawing enabled can depend on operating system settings and other factors, so the precise behavior of this pseudo-class will vary from platform to platform.
This feature is not defined in any specification yet, though it was discussed in the working group and it was decided to add it to Selectors 4 or 5.
Note: Developers tend to use :-moz-focusring
to differentiate between the focus
state when the user focuses an element via a mouse click versus keyboard tabbing. It is also potentially useful if you are creating a custom element and you want to change its style based on its behavior.
Syntax
:-moz-focusring
Examples
HTML
<input />
CSS
input { margin: 5px; } :-moz-focusring { color: red; outline: 2px dotted green; }
Result
Specifications
Not part of any standard.
Browser compatibility
No compatibility data found. Please contribute data for "css.selectors.-moz-focusring" (depth: 1) to the MDN compatibility data repository.