实现 Promise 静态方法

Promise.myAll = function (promises) {
  return new Promise((resolve, reject) => {
    const result = []
    let count = 0
 
    if (promises.length == 0) {
      return resolve([])
    }
 
    promises.forEach((p, index) => {
      Promise.resolve(p).then(value => {
        result[index] = value
        count++
 
        if (count == promises.length) {
          resolve(result)
        }
      }, reject)
    })
  })
}

Promise.myAllSettled = function (promises) {
  return new Promise(resolve => {
    const result = []
    let count = 0
 
    if (promises.length == 0) {
      return resolve

Promise.myRace = function (promises) {
  return new Promise((resolve, reject) => {
    promises.forEach(p => {
      Promise.resolve(p).then(resolve, reject

Promise.myAny = function (promises) {
  return new Promise((resolve, reject) => {
    const errors = []
    let count = 0
 
    if (promises.length == 0)