The :indeterminate CSS pseudo-class represents any form element whose state is indeterminate.

/* Selects any <input> whose state is indeterminate */
input:indeterminate {
  background: lime;
}

Elements targeted by this selector are:

Syntax

:indeterminate

Examples

Checkbox & radio button

This example applies special styles to the labels associated with indeterminate form fields.

HTML

<div>
  <input type="checkbox" id="checkbox">
  <label for="checkbox">This label starts out lime.</label>
</div>
<div>
  <input type="radio" id="radio">
  <label for="radio">This label starts out lime.</label>
</div>

CSS

input:indeterminate + label {
  background: lime;
}

JavaScript

var inputs = document.getElementsByTagName("input");

for (var i = 0; i < inputs.length; i++) {
  inputs[i].indeterminate = true;
}

Progress bar

HTML

<progress>

CSS

progress {
  margin: 4px;
}

progress:indeterminate {
  opacity: 0.5;
  background-color: lightgray;
  box-shadow: 0 0 2px 1px red;
}

Result

Specifications

Specification Status Comment
HTML Living Standard
The definition of ':indeterminate' in that specification.
Living Standard No change.
HTML5
The definition of ':indeterminate' in that specification.
Recommendation Defines the semantics of HTML and constraint validation.
Selectors Level 4
The definition of ':indeterminate' in that specification.
Working Draft No change.
CSS Basic User Interface Module Level 3
The definition of ':indeterminate' in that specification.
Candidate Recommendation Defines the pseudo-class, but not the associated semantics.

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Edge Opera Safari
type="checkbox" (Yes) 3.6 (1.9.2) 9.0 (Yes) 10.60 (2.6) 3.0
<progress> 6.0 6.0 (6.0) 10 (Yes) ? 5.2
type="radio" 39.0 51 (51)[1] No support No support[2] ? No support[3]
Feature Android Firefox Mobile (Gecko) IE Mobile Edge Opera Mobile Safari Mobile
type="checkbox" ? 1.0 (1.9.2) ? (Yes) ? ?
<progress> ? 6.0 (6.0) ? (Yes) ? ?
type="radio" 39.0 51.0 (51.0)[1] No support No support[2] ? No support[3]

[1] Implemented in bug 885359.

[2] See Edge bug 7124038.

[3] See WebKit bug 156270.

Document Tags and Contributors

 Last updated by: CITguy,