The :default
CSS pseudo-class selects form elements that are the default in a group of related elements.
The :default
CSS pseudo-class selects form elements that are the default in a group of related elements.
What this selector matches is defined in HTML Standard §4.16.3 Pseudo-classes — it may match the <button>
, <input type="checkbox">
, <input type="radio">
, and <option>
elements:
selected
attribute, or the first enabled option in DOM order. multiple
<select>
s can have more than one selected
option, so all will match :default
.<input type="checkbox">
and <input type="radio">
match if they have the checked
attribute.<button>
matches if it is a <form>
's default submission button: the first <button>
in DOM order that belongs to the form. This also applies to <input>
types that submit forms, like image
or submit
.:default { /* ... */ }
<fieldset> <legend>Favorite season</legend> <input type="radio" name="season" id="spring" value="spring" /> <label for="spring">Spring</label> <input type="radio" name="season" id="summer" value="summer" checked /> <label for="summer">Summer</label> <input type="radio" name="season" id="fall" value="fall" /> <label for="fall">Fall</label> <input type="radio" name="season" id="winter" value="winter" /> <label for="winter">Winter</label> </fieldset>
input:default { box-shadow: 0 0 2px 1px coral; } input:default + label { color: coral; }
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
:default |
10 | 79 | 4 | No | 10 | 5 | 37 | 18 | 4 | 10.1 | 5 | 1.0 |
<button>
, <input type="checkbox">
, <input type="radio">
, and <option>
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https://developer.mozilla.org/en-US/docs/Web/CSS/:default