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La pseudo-class CSS :indeterminate representa qualsevol element de formulari, l'estat del qual, sigui indeterminat.

/* Selecciona qualsevol <input> l'estat del qual sigui indeterminat */
input:indeterminate {
  background: lime;

Els elements als quals apunta aquest selector són:




Checkbox & radio button

Aquest exemple aplica estils especials a les etiquetes associades a camps de formulari indeterminats.


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


input:indeterminate + label {
  background: lime;


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

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

Progress bar




progress {
  margin: 4px;

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



Especificació Estat Comentari
HTML Living Standard
The definition of ':indeterminate' in that specification.
Living Standard Sense canvis
The definition of ':indeterminate' in that specification.
Recommendation Defineix la semàntica d'HTML i la validició de restriccions
Selectors Level 4
The definition of ':indeterminate' in that specification.
Working Draft Sense canvis
CSS Basic User Interface Module Level 3
The definition of ':indeterminate' in that specification.
Proposed Recommendation Defineix la pseudo-class, però no la semàntica associada.

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Descripció 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]
Descripció 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] Implementat en errada 885359.

[2] Veure Edge errada 7124038

[3] Veure WebKit errada 156270

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Contributors to this page: Legioinvicta
Last updated by: Legioinvicta,