防抖.
function debounce(fn, delay) {
let timer = null
const _debounce = function () {
var _this = this;
var args = arguments;
if (timer) clearTimeout(timer)
timer = setTimeout(() => {
fn.apply(_this, args);
}, delay)
}
return _debounce
}
ES6+
export const debounce = (fn, delay) => {
let timer = null;
let that = this;
return (...args) => {
timer && clearTimeout(timer)
timer = setTimeout(() => {
fn.apply(that, args);
}, delay);
}
节流.
function throttle(fn, delay) {
var timer;
return function () {
var _this = this;
var args = arguments;
if (timer) {
return;
}
timer = setTimeout(function () {
fn.apply(_this, args);
timer = null;
}, delay)
}
}
ES6+
export const throttle = (fn, delay) => {
let timer = null;
let that = this;
return (args) => {
if (timer) return;
timer = setTimeout(() => {
fn().apply(that, args);
timer = null;
}, delay);
}
}
