js scrollTop勻速滾動

//勻速滾動
function scroll(s,t){
	let sp = 10/也可根據當前scrollTop動態改變sp的值，從而實現加速和減速滾動的效果
	let cont = Number.parseInt(t / sp)
	let oneLong = s / cont
	let timer = setInterval(()=>{
		console.log(cont)
		if(cont > 0){
			cont--
			window.scrollBy(0,oneLong)
		}else{
			clearInterval(timer)
		}
		
	},sp)
}