The add
method of the CustomStateSet
interface adds an item to the CustomStateSet
, after checking that the value is in the correct format.
CustomStateSet.add()
Syntax
add(value)
Parameters
-
value
-
A string 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
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
add |
90
|
90
|
No
|
No
|
76
|
No
|
90
|
90
|
No
|
64
|
No
|
15.0
|
© 2005–2021 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/CustomStateSet/add