qq_43119912的博客

防抖：无论触发多少次，只执行最后一次代码实现：const f1 = (function () { let timeout; return function (cb, wait) { timeout && clearTimeout(timeout) timeout = setTimeout(() => { cb() }, wait)

const myAll = function (list) { return new Promise((resolve, reject) => { const r = [] for (let i = 0; i < list.length; i ++) { Promise.resolve(list[i]).then(res => { r[i] = res.

看如下代码：function useCache () { const data = {}; // 存放要缓存的数据 return { setItem: (key, value) => { data[key] = value }, getItem: key => { return data[key