promise.ts

function check(fn: Function) {
  try {
    const ret = fn()
    return [ret, null]
  } catch (err) {
    return [null, err]
  }
}

async function checkAsync<T>(promise: Promise<T>) {
  try {
    const ret = await promise
    return [ret, null]
  } catch (err) {
    return [null, err]
  }
}

;(async () => {
  const [ret, err] = await checkAsync(
    Promise.all([
      new Promise((resolve, reject) => {
        setTimeout(() => {
          if (Math.random() < 0.5) {
            resolve("ok")
          } else {
            reject("not ok")
          }
        }, 1e3)
      }),
      new Promise((resolve, reject) => {
        setTimeout(() => {
          if (Math.random() < 0.5) {
            resolve("ok")
          } else {
            reject("not ok")
          }
        }, 2e3)
      }),
      new Promise((resolve, reject) => {
        setTimeout(() => {
          if (Math.random() < 0.5) {
            resolve("ok")
          } else {
            reject("not ok")
          }
        }, 3e3)
      }),
    ]),
  )
  console.log({ ret, err })
})()