Vue引入外部异步js函数并接收返回值

 export default 和export ：

 myModule.js

//export default 只能出现一次，在引入的时候直接写，不用在花括号里面结构赋值
export default function defaultFunction() {
  console.log('This is the default function');
}

export function anotherFunction() {
  console.log('This is another function');
}

export const myVariable = 'This is myVariable';

// 另一个文件
import defaultFunc, { anotherFunction, myVariable } from './myModule';
defaultFunc(); // 输出：This is the default function
anotherFunction(); // 输出：This is another function
console.log(myVariable); // 输出：This is myVariable

场景：

在Vue项目里面，外部定义一个upload.js文件，在里面执行异步上传的upFile函数。在Fille.vue里面引用并接受函数返回值。

test.js


写法一 async 与 await：
const axios = require('axios');
export async function up(data) {

    let result = await axios({
        method: 'post',
        url: `api接口`,
        data: { eventNam: data },
        headers: {
            token: localStorage.getItem('token')
        }
    })
    return result   需要在外部返回

}


写法二 new Promise：

const axios = require('axios');
export function up(data) {
    return new Promise((resolve) => {
        axios({
            method: 'post',
            url: `https://lendingapi-sit.dowsure.com/lending/event/add`,
            data: { eventNam: data },
            headers: {
                token: localStorage.getItem('token')
            }
        })
            .then(res => {
                resolve(res.data)
            });

    })
}



写法三：

const axios = require('axios');

export async function up(data) {
    let result = ''  //获取函数返回值
    await axios({
        method: 'post',
        url: `https://lendingapi-sit.dowsure.com/lending/event/add`,
        data: { eventNam: data },
        headers: {
            token: localStorage.getItem('token')
        }
    })
        .then(res => {
            result = res.data
        });
    return result //获取函数返回值   需要在外部返回
}

File.vue

<el-button @click="getTest">调用异步函数</el-button>

import { up } from "@/api/test"
async getTest() {
     
          let res = await up(111)

        }