CSSPseudoElement

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The CSSPseudoElement interface represents a pseudo-element that may be the target of an event or animated using the Web Animations API. Instances of this interface may be obtained by calling Element.pseudo().

Instance properties

CSSPseudoElement.element Experimental Read only: Returns the originating/parent Element of the pseudo-element.
CSSPseudoElement.type Experimental Read only: Returns the pseudo-element selector as a string.

Instance methods

CSSPseudoElement extends EventTarget, so it inherits the following methods:

EventTarget.addEventListener(): Registers an event handler of a specific event type on the pseudo-element.
EventTarget.dispatchEvent(): Dispatches an event to this pseudo-element.
EventTarget.removeEventListener(): Removes an event listener from the pseudo-element.

Examples

Basic example using Element.pseudo

Using pseudo-elements, most modern browsers will automatically add quotation marks around text inside a <q> element. (A style rule may be needed to add quotation marks in older browsers.) The example below demonstrates the basic properties of the CSSPseudoElement object representing the opening quotation mark.

const element = document.querySelector("q");
const cssPseudoElement = element.pseudo("::before");
console.log(cssPseudoElement.element); // Outputs [object HTMLQuoteElement]
console.log(cssPseudoElement.type); // Outputs '::before'

Specifications

Specification
CSS Pseudo-Elements Module Level 4 # CSSPseudoElement-interface

Browser compatibility

BCD tables only load in the browser