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.
Summary
::-webkit-meter-inner-element is a proprietary WebKit CSS pseudo-element for selecting and applying styles to to the outer containing element of a <meter> element. Additional markup to render the meter element as read-only.
Specifications
Not part of any specification. This is a proprietary pseudo-element specific to WebKit/Blink.
Examples
<meter min="0" max="10" value="6">Score out of 10</meter>
meter {
  /* Reset the default appearance */
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
}
meter::-webkit-meter-inner-element {
  -webkit-appearance: inherit;
  box-sizing: inherit;
  border: 1px solid #aaa;
}
Note: This will only work in Webkit/Blink-based browsers.
Browser compatibility
| Feature | Firefox (Gecko) | Chrome | Internet Explorer | Opera | Safari | 
|---|---|---|---|---|---|
| Basic support | No support | (Yes) | No support | (Yes) | (Yes) | 
| Feature | Firefox Mobile (Gecko) | Android | IE Phone | Opera Mobile | Safari Mobile | 
|---|---|---|---|---|---|
| Basic support | No support | (Yes) | No support | (Yes) | (Yes) | 
See also
The pseudo-elements used by WebKit/Blink to style other parts of a <meter> element are as follows:
- ::-webkit-meter-bar
- ::-webkit-meter-even-less-good-value
- ::-webkit-meter-optimum-value
- ::-webkit-meter-suboptimum-value