Sample code how to request promises in parallel

promise.js

const promiseA = () => new Promise(resolve => {
  setTimeout(() => resolve("result of promiseA"), 2000)
})
const promiseB = () => new Promise(resolve => {
  setTimeout(() => resolve("result of promiseB"), 3000)
})
const promiseC = () => new Promise(resolve => {
  setTimeout(() => resolve("result of promiseC"), 1000)
})

Promise.all([promiseA(), promiseB(), promiseC()]).then(result => {
  console.log(result)
})

async function test() {
  const [resultA, resultB, resultC] = await Promise.all([promiseA(), promiseB(), promiseC()])
  console.log(resultB)
}

test()