`::-webkit-progress-inner-element` CSS pseudo-element

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 ::-webkit-progress-inner-element CSS pseudo-element represents the outermost container of the <progress> element. It is the parent of the ::-webkit-progress-bar pseudo-element.

Note: In order to let ::-webkit-progress-value take effect, appearance needs to be set to none on the <progress> element.

Syntax

::-webkit-progress-inner-element {
  /* ... */
}

Examples

These examples work only on Blink and WebKit.

Adding a black border around the progress bar

In this example, a 2px black border is added around the progress bar.

HTML

<progress value="10" max="50"></progress>

CSS

progress {
  -webkit-appearance: none;
}

::-webkit-progress-inner-element {
  border: 2px solid black;
}

Result

Result screenshot

If you're not using a Blink or WebKit browser, the above code results in a progress bar looking like this:

Progressbar is a long green and gray box with a black border. The left 20% of the box is green. The right 80% is gray.

Specifications

Not part of any standard.

Browser compatibility

	Desktop					Mobile
	Chrome	Edge	Firefox	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on iOS	Samsung Internet	WebView Android	WebView on iOS
`-webkit-progress-inner-element`	23	79	No	15	7	25	No	14	7	1.5	4.4	7