scrollbar.scrollTo easing not working

[zippw]

Checks

• Not a duplicate.

Version

8.8.1

Description

Summary
Hello!
When I click on button, scrollbar should scroll to the top

SmoothScrollbar.use(ScrollTriggerPlugin, SoftScrollPlugin);

const scrollbar = SmoothScrollbar.init(document.querySelector('.scroller'), {
    renderByPixels: false,
    damping: 0.075,
    plugins: {
        SoftScroll: {
            x: false
        },
    }
});
scrollbar.track.xAxis.element.remove();

document.getElementById('scroll_to_top').addEventListener('click', function () {
    scrollbar.scrollTo(0, 0, 2000, {
        callback: () => console.log('done!'),
        easing: easing.easeOutQuint
    });
})

When I use easing-js, scrollbar stops working so I can't scroll at all (scrollTo also not work)
If I remove easing, it works properly.
Expected Behavior
After clicking on a button, scrollbar supposed to scroll on top with easing

I love your project and I hope you answer me

Steps to Reproduce

?

Online Demo

No response

[idiotWu]

It is working on my side. Any online demos?

[zippw]

Unfortunately, I won't be able to show this separately, but what conditions should there be for proper operation? Maybe css overflow... The scrollbar works great. Could there be a problem with gsap ScrollTrigger? (there is a plugin). If I use the easing parameter, the scrollbar will intercede on the spot and nothing can be done with it

[idiotWu]

We are not able to figure out the issue unless we see a demo. However, if you don’t need the callback, you can try scrollbar.setMomentum(-scrollbar.offset.x, -scrollbar.offset.y) to scroll to top.

[zippw]

Sky.Tools.-.Home.-.Google.Chrome.2023-02-02.21-49-27.mp4

[zippw]

Sky.Tools.-.Home.-.Google.Chrome.2023-02-02.21-52-50.mp4

This works when I'm not using easing

[idiotWu]

One guess is that something is wrong with the easing-js you are using—it seems to return a NaN and thus break the scrollbar.

[zippw]

how can i see some debug stuff? I mean, there are no errors at all, easing.easeOutQuint returns function

[idiotWu]

In your console (or in the code), type easing.easeOutQuint(0.5) and see if it returns a number.

[zippw]

It returns NaN

[idiotWu]

Alright, so I guess you are using the wrong easing-js. Our scrollbar supports this one: https://github.com/danro/easing-js

[idiotWu]

The one you got from npm is totally a different package: danro/easing-js#5

[zippw]

Wow! Thank you very much! I would never have guessed just by downloading another library by the same name heh