First install axios

npm install axios --save

Create a new ajax.js file to encapsulate axios, expose encapsulated code functions, and call them on other pages

import axios from 'axios'
import qs from 'qs'//Serialized string
import {MessageBox} from 'element-ui'//Introducing elementUI components
import router from "../router.js";
axios.defaults.withCredentials = true; //Let ajax carry cookie s
axios.defaults.headers.common['Content-Type'] = 'application/x-www-form-urlencoded;charset=UTF-8'//Setting the request header
export default function ajax(url, data = {}, type = 'GET') {
	if (data === {}) {
		data = {
			"t": new Date().getTime()
		}
	}
	return new Promise(function(resolve, reject) {
		// Execute asynchronous ajax requests
		let promise
		if (type === 'GET') {
			// Prepare url query parameter data
			let dataStr = '' //Data mosaic string
			Object.keys(data).forEach(key => {
			    dataStr += key + '=' + data[key] + '&'
			})
			if (dataStr !== '') {
			    dataStr = dataStr.substring(0, dataStr.lastIndexOf('&'))
			    url = url + '?' + dataStr + '&_=' + new Date().getTime()
			}
			// Send get request
			promise = axios.get(url, data)
		} else {
			// Send a post request
			promise = axios.post(url, qs.stringify(data))
		}
		promise.then(function(response) {
			// A successful call to resolve()
			resolve(response.data)
			if (response.data.status != 'success') {
				MessageBox.alert(response.data.msg, 'Error prompt', {
					confirmButtonText: 'Determine',
					type: 'error'
				});
			}
		}).catch(function(error) {
			//Failed to call reject()
			if (error && error.response) {
				if (error.response.data.message === 'User not logged in') {
					router.push('/login')
				}
			}
			reject(error)
		})
	})
}

Create a new api.js file, call axios, set up the interface and expose it (interface is unified in a file, easy to manage)

import ajax from './ajax'//Introducing packaged axios

export const Constant name = (parameter)=>ajax(url,{parameter},'Method name')

//Example: export const DETAIL = (index, id) => Ajax ('http://baidu.com/hhh/detail', {index, id})

On pages where the interface is needed, the interface is introduced and invoked

//Import interface
import {DETAIL} from "../../api/api.js"

//Calling interface
async init(){
 let result = await DETAIL(index,id)    
}

This article uses part of es6. If you don't understand it, you can take a look at it. Introduction to Ruan Yifeng ES6

There is also a good article on async await. You can take a look at it. async await asynchronism