node.js - 使用 Promise.allSettled() 执行一批 Promise

Question

在 Node v10.15.1 中，我尝试使用 Promise.allSettled() 批量执行 Promise，但它抛出一个错误

TypeError: Promise.allSettled is not a function

Promise.all() 是否返回一个 promise ？

下面的Main函数返回一个对象。其他函数使用一些 Promise 来创建其“子对象”。

为什么我需要“批量 promise ”:要创建子对象，必须解决所有必需的 promise 。但并非“主对象”中需要所有子对象。

const path = require('path');
const os = require('os');
const si = require('systeminformation');

function getFoo() {
  // all these promises have to be settled to construct the sub-object
  return Promise.all([si.system(), si.chassis()]).then(([system, chassis]) => {
    return { /* hidden for brevity : use system and chassis to return a single object */ };
  })
  .catch(ex => { /* hidden for brevity */ });
}

function getBar() {
  // all these promises have to be settled to construct the sub-object
  return Promise.all([si.osInfo(), si.uuid()]).then(([osInfo, uuid]) => {
    return { /* hidden for brevity : use osInfo and uuid to return a single object */ };
  })
  .catch(ex => { /* hidden for brevity */ });
}

function getBaz() {
  // all these promises have to be settled to construct the sub-object
  return Promise.all([os.networkInterfaces(), si.networkInterfaceDefault()]).then(([interfaces, defaultInterface]) => {
    return { /* hidden for brevity : use interfaces and defaultInterface to return a single object */ };
  })
  .catch(ex => { /* hidden for brevity */ });
}

function Main() {
  // some of these promises can be rejected
  Promise.allSettled([ getFoo(), getBar(), getBaz() ])
    .then(([foo, bar, baz]) => {
      return { foo, bar, baz }
    })
    .catch(ex => { /* hidden for brevity */ });
}

Main();

预期对象的一个​​示例

{
  foo: {
    prop: 'example',
    someOtherProps: 'We are there!'
  },
  baz: {
    test: 50
  }
}

Answer 1

Promise.allSettled is available in node version >= 12.9