return result;

/*
     return new Promise((resolve, reject) => {
        resolve(result);
    }); 
*/

先后用了兩類寫法，最后反應(yīng)過(guò)來(lái)async函數(shù)默認(rèn)返回的就是Promise對(duì)象，所以直接返回結(jié)果就可以啊。

Making setTimeout an async/await function

no need to pass anything to callback func but just resolve

  async function wait(ms) {
    return new Promise(resolve => {
    setTimeout(resolve, ms);
  });
}

async function doRequests(uris) {
  for(const uri of uris) {
    await fetch(uri);
    await wait(1000);
  }
}