javascript nodejs异步测试由crazy4groovy创建 - https://repl.it/NPK6/4

Posted 2021-05-04

async function a() {
  let a = await Promise.resolve(1)
  console.log(2, a) // "2 1"
}
a()

function PromisePlus() {
  let resolve, reject;
  return { promise: new Promise((...args) => { [resolve, reject] = args; }), resolve, reject }
}

const { promise, resolve, reject } = PromisePlus();
console.log(typeof promise, typeof resolve, typeof reject)
promise.then(data => console.log(3, data)) // "3 42"
resolve(42)

console.log(1, ' START (and wait)')