防抖函数
function debounce(fn, delay = 200) {
let timer
return function(...args) {
if (timer) {
clearTimeout(timer)
timer = null
}
timer = setTimeout(() => {
fn.apply(this, args)
clearTimeout(timer)
timer = null
}, delay)
}
}
节流函数
function throttle(fn, delay = 200) {
let flag = true
return function(...args) {
if(!flag) {
return
}
flag = false
let timer = setTimeout(() => {
fn.apply(this, args)
flag = true
clearTimeout(timer)
}, delay)
}
}