How to get speed of Srcollbar

[cpiocova]

Hello thank you for this awesome plugin!

Im kinda new in this and i have a question.

I would like to get the speed data from the scroll, like you guys have in your page (https://idiotwu.github.io/smooth-scrollbar/) when you user a plot to show the speed curve.

Is there any function that i should be calling to get the value of the speed scroll.

For example i would like to get the offset doing an:

scrollbar.addListener( () => {scrollbar.offset})

And then, get the offset for X and Y.

Is there any way to get the speed like:
scrollbar.addListener( () => {scrollbar.speed})

Because i would like to animate dom elements using the speed that i get for every addListener value i get

Kind Regards,

Pio

[idiotWu]

Since the speed is given by

you need to record the last offsets and compare it with current ones.

Here is the implementation from the demo page:

smooth-scrollbar/__demo__/scripts/monitor.ts

Lines 414 to 435 in b8e4005

	scrollbar.addListener(() => {
	let current = Date.now();
	let offset = scrollbar.offset.y;
	let duration = current - lastTime;
	if (!duration || offset === lastOffset) return;
	if (duration > 100) {
	reduceAmount += (duration - 1);
	duration -= (duration - 1);
	}
	let velocity = (offset - lastOffset) / duration;
	lastTime = current;
	lastOffset = offset;
	records.push({
	offset,
	time: current - reduceAmount,
	reduce: reduceAmount,
	speed: Math.abs(velocity),
	});

[cpiocova]

Thank's my friends! Solved!!