CSSPseudoElement.type
Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
 The type read-only property of the CSSPseudoElement interface returns the type of the pseudo-element as a string, represented in the form of a CSS selector. 
Syntax
var typeOfPseudoElement = cssPseudoElement.type;
Value
A CSSOMString containing one of the following values:
Examples
 The example below demonstrates the relationship between CSSPseudoElement.type and Element.pseudo(): 
const myElement = document.querySelector('q'); const mySelector = '::after'; const cssPseudoElement = myElement.pseudo(mySelector); const typeOfPseudoElement = cssPseudoElement.type; console.log(mySelector === typeOfPseudoElement); // Outputs true
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 | |
| type | No | No | 75 63-75 | No | No | No | No | No | 63-79 | No | No | No | 
See also
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    https://developer.mozilla.org/en-US/docs/Web/API/CSSPseudoElement/type