如何使用来自函数的async-await返回来自异步函数的值? [英] How to return values from async functions using async-await from function?

问题描述

如何从异步函数返回值? 我试图喜欢这个

How can I return the value from an async function? I tried to like this

const axios = require('axios');
async function getData() {
    const data = await axios.get('https://jsonplaceholder.typicode.com/posts');
    return data;
}
console.log(getData());

这是给我的，

Promise { <pending> }

推荐答案

您不能await超出async范围的内容.为了获得预期的结果，您应该将console.log包装到异步IIFE中，即

You cant await something outside async scope. To get expected result you should wrap your console.log into async IIFE i.e

async function getData() {
  return await axios.get('https://jsonplaceholder.typicode.com/posts');
}

(async () => {
  console.log(await getData())
})()

Worked 示例.

有关 async/await 的更多信息

More information about async/await

由于axios返回一个承诺，因此getData函数可以省略async/await，如下所示:

Since axios returns a promise the async/await can be omitted for the getData function like so:

function getData() {
  return axios.get('https://jsonplaceholder.typicode.com/posts');
}

然后像以前一样做

(async () => {
   console.log(await getData())
})()

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