test-results.txt

Introduction
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This script was created during a project when I was working at the web agency BombayWorks. I did some testing in different browsers to know how to do this. The project only required support down to IE 8, so IE 6 and 7 are not in the test results, but they probably give the same result, because it works equally good in these versions.



Browser differences
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There are two properties where you can access wheel data: wheelDelta and detail.
All browsers except Firefox use wheelData, but Opera gives another value than the rest.
All browsers except IE8 also use detail, but only Firefox and Opera give a correct result.

Below are the different browsers that show the same result for each property.

wheelDelta
 IE8
 IE9
 Safari (val * 10 will be the same as the others)
 Chrome

detail
 Firefox
 Opera

For one scroll update these values will be returned from each property.
 wheelDelta: -120
 detail: 1

The values vary though, depending on the input device. Trackpads in Safari outputs
 a much lower value to give a smoother experience.



Test results
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These are the test values from each browser, using a regular mouse wheel, scrolling 1 step

wheelDelta
 Safari: -12
 Chrome: -120
 Firefox: undefined
 Opera: -40
 IE8: -120
 IE9: -120

detail
 Safari: 0
 Chrome: 0
 Firefox: 1
 Opera: 1
 IE8: undefined
 IE9: 0