CustomStateSet: add() method
Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The add method of the CustomStateSet interface adds an item to the CustomStateSet, after checking that the value is in the correct format.
Syntax
add(value)
Parameters
value-
A string which must be a
<dashed-ident>, with the form--mystate.
Return value
Undefined.
Exceptions
SyntaxErrorDOMException-
Thrown if the string is not a
<dashed-ident>.
Examples
The following function adds the state --checked to a CustomStateSet.
class MyCustomElement extends HTMLElement {
set checked(flag) {
if (flag) {
this._internals.states.add("--checked");
}
}
}
Specifications
| Specification |
|---|
| Custom State Pseudo Class # dom-customstateset-add |
Browser compatibility
BCD tables only load in the browser