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手写 捕获所有数据状态

try catch​

var getData1 = Promise.resolve('1')
var getData2 = Promise.reject('error')
var getData3 = Promise.resolve('3')

var getAllData = async function () {
  try {
    var data1 = await getData1()
  } catch (e) {
    var data1 = { code: -1, error: e }
  }
  try {
    var data2 = await getData2()
  } catch (e) {
    var data2 = { code: -2, error: e }
  }
  try {
    var data3 = await getData3()
  } catch (e) {
    var data3 = { code: -3, error: e }
  }
  return {
    data1,
    data2,
    data3
  }
}

var fn = async () => {
  try {
    var result = await getAllData()
    console.log(result)
  } catch (error) {
    console.log(error)
  }
}

fn()
{
  data1: "1"
  data2: {code: -2, error: "error"}
  data3: "3"
}

Promise.allSettled​

发音：Settled('setld')

var getData1 = Promise.resolve('1')
var getData2 = Promise.reject('error')
var getData3 = Promise.resolve('3')

const getAllData = [getData1, getData2, getData3]

Promise.allSettled(getAllData).then(values => console.log(values))
{
  0: {status: "fulfilled", value: "1"}
  1: {status: "rejected", reason: "error"}
  2: {status: "fulfilled", value: "3"}
}