2018-10-11 async方法返回结果时怎么写？

return result;

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

先后用了两类写法，最后反应过来async函数默认返回的就是Promise对象，所以直接返回结果就可以啊。

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);
  }
}