了解“await”关键字的放置位置

只是为了确保我明白 async/await 好的,我想确认一下。让我先创建几个函数:

let resolveAfter2Seconds = () => {
  console.log("starting slow promise");
  return new Promise(resolve => {
    setTimeout(function() {
      resolve(20);
      console.log("slow promise is done");
    }, 2000);
  });
};

let resolveAfter1Second = () => {
  console.log("starting fast promise");
  return new Promise(resolve => {
    setTimeout(function() {
      resolve(10);
      console.log("fast promise is done");
    }, 1000);
  });
};

现在,以这两个代码块为例:

let concurrentStart = async () => {
  console.log('==CONCURRENT START with await==');
  const slow = resolveAfter2Seconds();
  const fast = resolveAfter1Second();

  console.log(await slow);
  console.log(await fast);
}

现在,是否上述功能等同于:

let concurrentStart = async () => {
  console.log('==CONCURRENT START with await==');
  const slow = await resolveAfter2Seconds();
  const fast = await resolveAfter1Second();

  console.log(slow);
  console.log(fast);
}

换句话说,我可以把 await 关键字在函数调用之前 await resolveAfter25Seconds() ,或者…我可以将wait放在控制台日志中触发该函数的触发- console.log(await slow); .

结果会是相同的吗,从这个意义上说,异步/等待在这两种情况下都将以相同的方式工作——在这种情况下,您可以用这两种方法完成相同的事情?