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:indeterminate

The :indeterminate CSS pseudo-class represents any form element whose state is indeterminate, such as checkboxes which have their HTML indeterminate attribute set to true, radio buttons which are members of a group in which all radio buttons are unchecked, and indeterminate <progress> elements.

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

Elements targeted by this selector are:

<input type="checkbox"> elements whose indeterminate property is set to true by JavaScript
<input type="radio"> elements, when all radio buttons with the same name value in the form are unchecked
<progress> elements in an indeterminate state

Syntax

:indeterminate

Examples

Checkbox & radio button

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

HTML

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

<fieldset>
  <legend>Radio</legend>
  <div>
    <input type="radio" id="radio1" name="radioButton" value="val1" />
    <label for="radio1">First radio label starts out lime.</label>
  </div>
  <div>
    <input type="radio" id="radio2" name="radioButton" value="val2" />
    <label for="radio2">Second radio label also starts out lime.</label>
  </div>
</fieldset>

CSS

input:indeterminate + label {
  background: lime;
}

JavaScript

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

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

Result

Progress bar

HTML

<progress></progress>

CSS

progress {
  margin: 4px;
}

progress:indeterminate {
  width: 80vw;
  height: 20px;
}

Result

Specifications

Specification
HTML Standard # selector-indeterminate
Selectors Level 4 # indeterminate

Browser compatibility

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	WebView Android	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet
`:indeterminate`	1	12	2	10	9	3	≤37	18	4	10.1	1	1.0
`checkbox`	1	12	3.6	10	10.6	3	≤37	18	4	11	1	1.0
`progress`	6	12	6	10	15	5.1	37	18	6	14	5	1.0
`radio`	39	79	51	No	26	No See WebKit bug 156270.	39	39	51	26	No See WebKit bug 156270.	4.0

:indeterminate

Syntax

Examples

Checkbox & radio button

HTML

CSS

JavaScript

Result

Progress bar

HTML

CSS

Result

Specifications

Browser compatibility

See also