Question

165

event.wheelDelta returns undefined

rated 0 times [ 170] [ 5] / answers: 1 / hits: 50459 / 13 Years ago, mon, january 16, 2012, 12:00:00

So I'm trying to disable scrolling on my page when my lightbox opens, and I found this really usefull script that does exactly that. (http://jsfiddle.net/mrtsherman/eXQf3/3/), unfortunately, when I use it on my own page, it disabled scrolling in my lightbox as well. I started to debug the code with alerts only to find out that event.wheelDelta returns undefined on my page, while in the JSFiddle, it returns -120.

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eastonb

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3 Years ago

answered 13 Years ago elishaannac · Accepted Answer

The event object in a jQuery event handler does not reflect the real event. wheelDelta is a non-standard event property^{IE and Opera}, available through the originalEvent property of the jQuery event.

In jQuery 1.7+, the detail property is not available at the jQuery Event object. So, you should also use event.originalEvent.detail to for this property at the DOMMouseScroll event. This method is backwards-compatible with older jQuery versions.

event.originalEvent.wheelDelta

Demo: http://jsfiddle.net/eXQf3/22/

See also: http://api.jquery.com/category/events/event-object/