how to add a right click listener javascript

element.addEventListener('contextmenu', (e) => {
	e.preventDefault();
    alert('Success');
}, false);   function rightclick() {
    var rightclick;
    var e = window.event;
    if (e.which) rightclick = (e.which == 3);
    else if (e.button) rightclick = (e.button == 2);
    alert(rightclick); // true or false, you can trap right click here by if comparison
}