JQuery select pseudo-element :after [duplicate]

Answer 1

It's not possible to bind directly to pseudo-elements, since those are not part of the DOM, but the desired effect can be approximated by binding to a parent element and testing for an offset related to the element that the :after acts upon:

The following renders as ELEMENT++, where clicking on "ELEMENT" and "++" each triggers different behavior:

ELEMENT

span::after {
  content: '++';
  position: absolute;
}

span.c1 {
  background: yellow;
}

span.c2::after {
  background: orange;
}

const span = document.querySelector('span');

span.addEventListener('click', function (e) {
    if (e.offsetX > span.offsetWidth) {
        span.className = 'c2';
    } else {
        span.className = 'c1';
    }
});

Interactive: http://jsfiddle.net/wC2p7/1/