A jQuery plugin that adds cross-browser mouse wheel support with delta normalization.

In order to use the plugin, simply bind the mousewheel event to an element.

It also provides two helper methods called mousewheel and unmousewheel that act just like other event helper methods in jQuery.

The event object is updated with the normalized deltaX and deltaY properties. In addition there is a new property on the event object called deltaFactor. Multiply the deltaFactor by deltaX or deltaY to get the scroll distance that the browser has reported.

Here is an example of using both the bind and helper method syntax:

// using on
$('#my_elem').on('mousewheel', function(event) {
    console.log(event.deltaX, event.deltaY, event.deltaFactor);
});

// using the event helper
$('#my_elem').mousewheel(function(event) {
    console.log(event.deltaX, event.deltaY, event.deltaFactor);
});

The old behavior of adding three arguments (delta, deltaX, and deltaY) to the event handler is now deprecated and will be removed in later releases.

See the tests on Github.

Support for browserify is baked in.

npm install jquery-mousewheel
npm install jquery-browserify

In your server-side node.js code:

var express = require('express');
var app = express.createServer();

app.use(require('browserify')({
    require : [ 'jquery-browserify', 'jquery-mousewheel' ]
}));

In your browser-side javascript:

var $ = require('jquery-browserify');
require('jquery-mousewheel')($);

This plugin is licensed under the MIT License.

Copyright (c) 2013 Brandon Aaron