为什么 Axios（带有 async/await）会返回一个完整的 promise？

Question

I have a problem with async / await . Here is my code:

 import axios from 'axios' export default async function getRequestedData (requestAddress, params) { return await axios.get(requestAddress, {params: params}) }

But instead of the result it returns a full promise, so the data is heavily nested inside a promise:

Answer 1

Like Ha Ja said, I think you still need to resolve the promise. If you just return the await you're going to get a promise.

const fs = require ('fs')

function getText () {

    return new Promise( (resolve, reject) => {

        fs.readFile('./foo.txt', 'utf8', (err, data) => {
            if (err) {
                reject(err)
            }
                resolve(data)
            })
        })
}

async function output () {
    try {
        let result = await getText()
        console.log("inside try: ", result)
        return result
    }
    catch (err){
        console.log(err)
    }
}

console.log("outside: ", output())
output().then( result => console.log("after then: ", result))

// outside:  Promise { <pending> }
// inside try:  foo text
// inside try:  foo text
// after then:  foo text

Answer 2

You have to return the data:

const response = await axios.get(requestAddress, {params: params})
return response.data;

Answer 3

一个班轮：

return (await axios.get(url)).data;

Answer 4

In React component you can do with this trick:

function InitProduct() {
    // Get your product from database
    var productId = 'abc';
    axios.get('/api/products/' + productId).then(response => {
        $('.' + productId).text(response.data.ProductTitle);
    });

    return (<div className={productId}></div>)
}

export class TestNow extends Component {
    render() {
        return (
            <div>
                {InitProduct()}
            </div>
        )
    }
}

Answer 5

异步函数将始终将它返回​​的内容包装在承诺中，因此您应该使用 then() 方法链接调用者，从而解决该承诺，例如： getRequestedData (requestAddress, params).then ( (data) => { ...do某物... }）;