CustomStateSet.add()
The add
method of the CustomStateSet
interface adds an item to the CustomStateSet
, after checking that the value is in the correct format.
Syntax
CustomStateSet.add(value)
Parameters
value
-
A
DOMString
which must be a<dashed-ident>
, with the form--mystate
.
Return Value
Undefined.
Exceptions
DOMException
SyntaxError
-
Thrown if the string is not a
<dashed-ident>
.
Examples
The following function adds the state --checked
to a CustomStateSet
.
set checked(flag) {
if (flag) {
this._internals.states.add('--checked');
}
Specifications
Specification |
---|
Custom State Pseudo Class # dom-customstateset-add |
Browser compatibility
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