You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
60 lines
1.3 KiB
60 lines
1.3 KiB
2 years ago
|
import { isFunction, isUnDef } from '@/utils/is'
|
||
|
|
import { ref, unref } from 'vue'
|
||
|
|
|
||
|
|
export interface ScrollToParams {
|
||
|
|
el: any
|
||
|
|
to: number
|
||
|
|
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, amount: number) => {
|
||
|
|
el.scrollTop = amount
|
||
|
|
}
|
||
|
|
|
||
|
|
const position = (el: HTMLElement) => {
|
||
|
|
return el.scrollTop
|
||
|
|
}
|
||
|
|
export function useScrollTo({ el, to, duration = 500, callback }: ScrollToParams) {
|
||
|
|
const isActiveRef = ref(false)
|
||
|
|
const start = position(el)
|
||
|
|
const change = to - start
|
||
|
|
const increment = 20
|
||
|
|
let currentTime = 0
|
||
|
|
duration = isUnDef(duration) ? 500 : duration
|
||
|
|
|
||
|
|
const animateScroll = function () {
|
||
|
|
if (!unref(isActiveRef)) {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
currentTime += increment
|
||
|
|
const val = easeInOutQuad(currentTime, start, change, duration)
|
||
|
|
move(el, val)
|
||
|
|
if (currentTime < duration && unref(isActiveRef)) {
|
||
|
|
requestAnimationFrame(animateScroll)
|
||
|
|
} else {
|
||
|
|
if (callback && isFunction(callback)) {
|
||
|
|
callback()
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
const run = () => {
|
||
|
|
isActiveRef.value = true
|
||
|
|
animateScroll()
|
||
|
|
}
|
||
|
|
|
||
|
|
const stop = () => {
|
||
|
|
isActiveRef.value = false
|
||
|
|
}
|
||
|
|
|
||
|
|
return { start: run, stop }
|
||
|
|
}
|