:default
The :default
CSS pseudo-class selects form elements that are the default in a group of related elements.
Try it
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:
- A default option element is the first one with the
selected
attribute, or the first enabled option in DOM order.multiple
<select>
s can have more than oneselected
option, so all will match:default
. <input type="checkbox">
and<input type="radio">
match if they have thechecked
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, likeimage
orsubmit
.
Syntax
css
:default {
/* ... */
}
Examples
HTML
html
<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>
CSS
css
input:default {
box-shadow: 0 0 2px 1px coral;
}
input:default + label {
color: coral;
}
Result
Specifications
Specification |
---|
HTML Standard # selector-default |
Selectors Level 4 # default-pseudo |
Browser compatibility
BCD tables only load in the browser
See also
- Web forms — Working with user data
- Styling web forms
- Related HTML elements:
<button>
,<input type="checkbox">
,<input type="radio">
, and<option>