Get mouse wheel events in jQuery?

Question

Is there a way to get the mouse wheel events (not talking about scroll events) in jQuery?

Answer 1

I got same problem recently where $(window).mousewheel was returning undefined

What I did was $(window).on('mousewheel', function() {});

Further to process it I am using:

function (event) {
    var direction = null,
        key;

    if (event.type === 'mousewheel') {
        if (yourFunctionForGetMouseWheelDirection(event) > 0) {
            direction = 'up';
        } else {
            direction = 'down';
        }
    }
}

Answer 2

This worked for me:)

 //Firefox
 $('#elem').bind('DOMMouseScroll', function(e){
     if(e.originalEvent.detail > 0) {
         //scroll down
         console.log('Down');
     }else {
         //scroll up
         console.log('Up');
     }

     //prevent page fom scrolling
     return false;
 });

 //IE, Opera, Safari
 $('#elem').bind('mousewheel', function(e){
     if(e.originalEvent.wheelDelta < 0) {
         //scroll down
         console.log('Down');
     }else {
         //scroll up
         console.log('Up');
     }

     //prevent page fom scrolling
     return false;
 });

from stackoverflow

Answer 3

​$(document).ready(function(){
    $('#foo').bind('mousewheel', function(e){
        if(e.originalEvent.wheelDelta /120 > 0) {
            console.log('scrolling up !');
        }
        else{
            console.log('scrolling down !');
        }
    });
});

Answer 4

This is working in each IE, Firefox and Chrome's latest versions.

$(document).ready(function(){
        $('#whole').bind('DOMMouseScroll mousewheel', function(e){
            if(e.originalEvent.wheelDelta > 0 || e.originalEvent.detail < 0) {
                alert("up");
            }
            else{
                alert("down");
            }
        });
    });

Answer 5

I was stuck in this issue today and found this code is working fine for me

$('#content').on('mousewheel', function(event) {
    //console.log(event.deltaX, event.deltaY, event.deltaFactor);
    if(event.deltaY > 0) {
      console.log('scroll up');
    } else {
      console.log('scroll down');
    }
});

Answer 6

Here is a vanilla solution. Can be used in jQuery if the event passed to the function is event.originalEvent which jQuery makes available as property of the jQuery event. Or if inside the callback function under we add before first line: event = event.originalEvent;.

This code normalizes the wheel speed/amount and is positive for what would be a forward scroll in a typical mouse, and negative in a backward mouse wheel movement.

Demo: http://jsfiddle.net/BXhzD/

var wheel = document.getElementById('wheel');

function report(ammout) {
    wheel.innerHTML = 'wheel ammout: ' + ammout;
}

function callback(event) {
    var normalized;
    if (event.wheelDelta) {
        normalized = (event.wheelDelta % 120 - 0) == -0 ? event.wheelDelta / 120 : event.wheelDelta / 12;
    } else {
        var rawAmmount = event.deltaY ? event.deltaY : event.detail;
        normalized = -(rawAmmount % 3 ? rawAmmount * 10 : rawAmmount / 3);
    }
    report(normalized);
}

var event = 'onwheel' in document ? 'wheel' : 'onmousewheel' in document ? 'mousewheel' : 'DOMMouseScroll';
window.addEventListener(event, callback);

There is also a plugin for jQuery, which is more verbose in the code and some extra sugar: https://github.com/brandonaaron/jquery-mousewheel