CustomStateSet: has() method
 The has() method of the CustomStateSet interface returns a Boolean asserting whether an element is present with the given value.
 
Syntax
Parameters
 value  -  
The value to test for in the CustomStateSet object.
   
 
Return value
A Boolean, true if value exists in the CustomStateSet.
 
Specifications
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 | 
has | 
90 | 
90 | 
No | 
No | 
76 | 
No | 
90 | 
90 | 
No | 
64 | 
No | 
15.0 |