`::-moz-focus-inner` CSS pseudo-element

Deprecated: This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.

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-focus-inner CSS pseudo-element is a Mozilla extension that represents an inner focus ring of the <button> element as well as the button, submit, reset, and color types of the <input> element.

Note: Using ::-moz-focus-inner with anything than the buttons that support it doesn't match anything and has no effect.

Syntax

::-moz-focus-inner {
  /* ... */
}

Example

HTML

<input type="submit" value="Input" /> <button type="submit">Button</button>

CSS

button::-moz-focus-inner,
input[type="color"]::-moz-focus-inner,
input[type="reset"]::-moz-focus-inner,
input[type="button"]::-moz-focus-inner,
input[type="submit"]::-moz-focus-inner {
  padding-block-start: 0px;
  padding-inline-end: 2px;
  padding-block-end: 0px;
  padding-inline-start: 2px;
  border: 2px dotted red;
}

Result

Specifications

Not part of any standard.