62 lines
1.2 KiB
TypeScript
62 lines
1.2 KiB
TypeScript
import { requestAnimationFrame } from '@/utils/animation'
|
|
|
|
export interface ScrollToParams {
|
|
el: HTMLElement
|
|
to: number
|
|
position: string
|
|
duration?: number
|
|
callback?: () => any
|
|
}
|
|
|
|
const easeInOutQuad = (t: number, b: number, c: number, d: number) => {
|
|
t /= d / 2
|
|
if (t < 1) {
|
|
return (c / 2) * t * t + b
|
|
}
|
|
t--
|
|
return (-c / 2) * (t * (t - 2) - 1) + b
|
|
}
|
|
const move = (el: HTMLElement, position: string, amount: number) => {
|
|
el[position] = amount
|
|
}
|
|
|
|
export function useScrollTo({
|
|
el,
|
|
position = 'scrollLeft',
|
|
to,
|
|
duration = 500,
|
|
callback
|
|
}: ScrollToParams) {
|
|
let isActiveRef = false
|
|
const start = el[position]
|
|
const change = to - start
|
|
const increment = 20
|
|
let currentTime = 0
|
|
|
|
const animateScroll = function () {
|
|
if (!isActiveRef) {
|
|
return
|
|
}
|
|
currentTime += increment
|
|
const val = easeInOutQuad(currentTime, start, change, duration)
|
|
move(el, position, val)
|
|
if (currentTime < duration && isActiveRef) {
|
|
requestAnimationFrame(animateScroll)
|
|
} else {
|
|
if (callback) {
|
|
callback()
|
|
}
|
|
}
|
|
}
|
|
const run = () => {
|
|
isActiveRef = true
|
|
animateScroll()
|
|
}
|
|
|
|
const stop = () => {
|
|
isActiveRef = false
|
|
}
|
|
|
|
return { start: run, stop }
|
|
}
|