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