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

Question

Scroll event is not firing while scrolling the ul. I'm using jQuery version 1.10.2. As I'm loading the ul from an ajax page, I couldn't use $('ulId').on('scroll', function() {}); or other live methods. Please help me to find a solution.

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

Answer 1

You probably forgot to give # before id for id selector, you need to give # before id ie is ulId

You 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');
});

Answer 2

Binding the scroll event after the ul has loaded using ajax has solved the issue. In my findings $(document).on( 'scroll', '#id', function () {...}) is not working and binding the scroll event after the ajax load found working.

$("#ulId").bind('scroll', function() {
   console.log('Event worked');
}); 

You may unbind the event after removing or replacing the ul.

Hope it may help someone.

Answer 3

Using VueJS I tried every method in this question but none worked. So in case somebody is struggling whit the same:

mounted() {
  $(document).ready(function() { //<<====== wont work without this
      $(window).scroll(function() {
          console.log('logging');
      });
  });
},

Answer 4

Another option could be:

$("#ulId").scroll(function () { console.log("Event Fired"); })

Reference: Here

Answer 5

$("body").on("custom-scroll", ".myDiv", function(){
    console.log("Scrolled :P");
})

$("#btn").on("click", function(){
    $("body").append('<div class="myDiv"><br><br><p>Content1<p><br><br><p>Content2<p><br><br></div>');
    listenForScrollEvent($(".myDiv"));
});


function listenForScrollEvent(el){
    el.on("scroll", function(){
        el.trigger("custom-scroll");
    })
}

see this post - Bind scroll Event To Dynamic DIV?

Answer 6

I know that this is quite old thing, but I solved issue like that: I had parent and child element was scrollable.

   if ($('#parent > *').length == 0 ){
        var wait = setInterval(function() {
            if($('#parent > *').length != 0 ) {
                $('#parent .child').bind('scroll',function() {
                  //do staff
                });
                clearInterval(wait);
            },1000);
        }

The issue I had is that I didn't know when the child is loaded to DOM, but I kept checking for it every second.

NOTE:this is useful if it happens soon but not right after document load, otherwise it will use clients computing power for no reason.

Answer 7

Can you place the #ulId in the document prior to the ajax load (with css display: none;), or wrap it in a containing div (with css display: none;), then just load the inner html during ajax page load, that way the scroll event will be linked to the div that is already there prior to the ajax?

Then you can use:

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

obviously replacing ulId with whatever the actual id of the scrollable div is.

Then set css display: block; on the #ulId (or containing div) upon load?

Answer 8

I just solved the problem with the fact that the scrollable element won't appear immediately after page load:

$(document).ready(function () {
   var checkIt = setInterval(function (){
       if($('body').find('.scrollable-wrapper').length > 0){
           clearInterval(checkIt);
           jQuery('.scrollable-wrapper').on('scroll', function () {
               console.log(1)
           });
       }
   },100)
});

After finding that the element is there, the interval will stop and the event will be fired to listen.