javascript 承诺超时

Posted 2021-05-03

const promiseTimeout = function(ms, promise){

  // Create a promise that rejects in <ms> milliseconds
  let timeout = new Promise((resolve, reject) => {
    let id = setTimeout(() => {
      clearTimeout(id);
      reject('Timed out in '+ ms + 'ms.')
    }, ms)
  })

  // Returns a race between our timeout and the passed in promise
  return Promise.race([
    promise,
    timeout
  ])
}