Can you add more information about what does if fixes, how to reproduce it or in which conditions it takes place?

When you scroll down, method moveSectionDown checks whether the next section exists, if not, it does nothing and doing it over and over again. At the very end, when slow, delta equals the 0 and scrolls up.

What browser and OS are you using to get a 0 value for delta?
Are you using a mouse or a trackpad?

I'm quite surprised you can get a zero value there. fullPage.js is using the same implementation to get the delta value and nobody complained about a similar issue.

I've tested this jsfiddle in Firefox, Chrome and IE and none of them return 0 to me when using a mouse wheel.

I use osx and trackpad. When I tested this jsfiddle in Firefox it was good, but when I used Chrome at the end accelerate scroll console.log return -0.

fullPage.js work me too.

fullPage.js work me too.

You mean, you don't get the error there?

at the end accelerate scroll console.log return -0.

You mean, in the last section? Or accelerating after a normal scroll .

You mean, you don't get the error there?

Yes, it's ok.

You mean, in the last section? Or accelerating after a normal scroll .

The osx scroll on the trackpad accelerates and slows down. The last point scroll the delta value is -0.

Ok I'll take a look from home later.