Jquery .on(‘scroll’) not firing the event while scrolling

You probably forgot to give # before id for id selector, you need to give # before id ie is ulIdYou probably need to bind the scroll event on the div that contains the ul and scrolls. You need to bind the event with div instead of `ul`

$(document).on( 'scroll', '#idOfDivThatContainsULandScroll', function(){
    console.log('Event Fired');
});

Edit

The above would not work because the scroll event does not bubble up in DOM which is used for event delegation, see this question why doesn’t delegate work for scrolling.

But with modern browsers > IE 8, you can do it in another way. Instead of delegating by using jquery, you can do it using event capturing with javascript document.addEventListener, with the third argument as true; see how bubbling and capturing work in this tuturial.

Live Demo

document.addEventListener('scroll', function (event) {
    if (event.target.id === 'idOfUl') { // or any other filtering condition        
        console.log('scrolling', event.target);
    }
}, true /*Capture event*/);

If you do not need event delegation then you can bind scroll event directly to the ul instead of delegating it through document.

Live Demo

$("#idOfUl").on( 'scroll', function(){
   console.log('Event Fired');
});