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                                            柒玥

第 24 题：实现 Promise.all

```javascript /** * Promise.all * @description 当这个数组里的所有promise对象全部变为resolve状态的时候，才会resolve, 当有一个promise对象变为reject状态时，就不再执行直接 reject * @param {*} values promise对象组成的数组作为参数 */ Promise.prototype.all = (values)=>{ return new Promise((resolve,reject)=>{ let resultArr = [] let count = 0 let...

第 23 题：介绍下 promise 的特性、优缺点，内部是如何实现的，动手实现 Promise

// 依照PromiseA+规范的Promise ```javascript const PENDING = 'pending' const FULFILLED = 'fulfilled' const REJECTED = 'rejected' const resolvePromise = (promise, x, resolve, reject) => { if (x === promise) {...