:indeterminate
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
The :indeterminate CSS pseudo-class represents any form element whose state is indeterminate, such as checkboxes that have been set to an indeterminate state with JavaScript, radio buttons which are members of a group in which all radio buttons are unchecked, and <progress> elements with no value attribute.
css
/* Selects any <input> whose state is indeterminate */
input:indeterminate {
background: lime;
}
Elements targeted by this selector are:
<input type="checkbox">elements with theindeterminateproperty set totrue.<input type="radio">elements with the samenamevalue and none of themchecked.<progress>elements with novalue, placing them in an indeterminate state.
Syntax
css
:indeterminate {
/* ... */
}
Examples
Checkbox & radio button
This example applies special styles to the labels associated with indeterminate form fields.
HTML
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
css
input:indeterminate + label {
background: lime;
}
fieldset {
padding: 1em 0.75em;
}
fieldset:first-of-type {
margin-bottom: 1.5rem;
}
fieldset:not(:first-of-type) > div:not(:last-child) {
margin-bottom: 0.5rem;
}
JavaScript
js
const inputs = document.getElementsByTagName("input");
for (const input of inputs) {
input.indeterminate = true;
}
Result
[フレーム]
Progress bar
HTML
html
<progress></progress>
CSS
css
progress {
margin: 4px;
}
progress:indeterminate {
width: 80vw;
height: 20px;
}
Result
[フレーム]
Specifications
| Specification |
|---|
| HTML # selector-indeterminate |
| Selectors Level 4 # indeterminate-pseudo |
Browser compatibility
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See also
- Web forms — Working with user data
- Styling web forms
- The
<input type="checkbox">element'sindeterminateproperty <input>and theHTMLInputElementinterface which implements it.- The
:checkedCSS selector lets you style checkboxes based on whether they're checked or not