jQuery Mouse Wheel Plugin
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
that act just like other event helper methods in jQuery.
The event object is updated with the normalized
In addition there is a new property on the event object called
deltaY to get the scroll distance that the browser
Here is an example of using both the bind and helper method syntax:
// using on;// using the event helper;
The old behavior of adding three arguments (
deltaY) to the
event handler is now deprecated and will be removed in later releases.
The combination of Browsers, Operating Systems, and Devices offer a huge range of possible delta values. In fact if the user uses a trackpad and then a physical mouse wheel the delta values can differ wildly. This plugin normalizes those values so you get a whole number starting at +-1 and going up in increments of +-1 according to the force or acceleration that is used. This number has the potential to be in the thousands depending on the device. Check out some of the data collected from users here.
Getting the scroll distance
In some use-cases we prefer to have the normalized delta but in others we want to know how far the browser should
scroll based on the users input. This can be done by multiplying the
deltaFactor by the
event property to find the scroll distance the browser reported.
deltaFactor property was added to the event object in 3.1.5 so that the actual reported delta value can be
extracted. This is a non-standard property.
Support for browserify is baked in.
npm install jquery-mousewheelnpm install jquery-browserify
In your server-side node.js code:
var express = ;var app = express;app;
var $ = ;$;