$ npm install axios

$ bower install axios

<script src="https://unpkg.com/axios/dist/axios.min.js"></script>

axios.defaults.timeout = 10000 //超時(shí)取消請(qǐng)求
axios.defaults.headers.post['Content-Type'] = 'application/json;charset=UTF-8'
axios.defaults.baseURL = process.env.BASE_URL 

// 創(chuàng)建實(shí)例時(shí)設(shè)置配置的默認(rèn)值
var instance = axios.create({
 baseURL: 'https://api.another.com'
});
// 在實(shí)例已創(chuàng)建后修改默認(rèn)值
instance.defaults.headers.common['Authorization'] = AUTH_TOKEN;

// 請(qǐng)求列表
const requestList = []
axios.interceptors.request.use((config) => {
 //1.將當(dāng)前請(qǐng)求的URL添加進(jìn)請(qǐng)求列表數(shù)組
 requestList.push(config.url)
 //2.請(qǐng)求開(kāi)始，改變loading狀態(tài)供加載動(dòng)畫(huà)使用
 store.dispatch('changeGlobalState', {loading: true})
 //3.從store中獲取token并添加到請(qǐng)求頭供后端作權(quán)限校驗(yàn)
 const token = store.getters.userInfo.token
 if (token) {
  config.headers.token = token
 }
 return config
}, function (error) {
 return Promise.reject(error)
})

axios.interceptors.response.use(function (response) {
 // 1.將當(dāng)前請(qǐng)求中請(qǐng)求列表中刪除
 requestList.splice(requestList.findIndex(item => item === response.config.url), 1)
 // 2.當(dāng)請(qǐng)求列表為空時(shí)，更改loading狀態(tài)
 if (requestList.length === 0) {
  store.dispatch('changeGlobalState', {loading: false})
 }
 // 3.統(tǒng)一處理權(quán)限認(rèn)證錯(cuò)誤管理
 if (response.data.code === 900401) {
  window.ELEMENT.Message.error('認(rèn)證失效，請(qǐng)重新登錄！', 1000)
  router.push('/login')
 }
 return response
}, function (error) {
 // 4.處理取消請(qǐng)求
 if (axios.isCancel(error)) {
  requestList.length = 0
  store.dispatch('changeGlobalState', {loading: false})
  throw new axios.Cancel('cancel request')
 } else {
  // 5.處理網(wǎng)絡(luò)請(qǐng)求失敗
  window.ELEMENT.Message.error('網(wǎng)絡(luò)請(qǐng)求失敗', 1000)
 }
 return Promise.reject(error)
})

const CancelToken = axios.CancelToken
//cancel token列表
let sources = []
const request = function (url, params, config, method) {
 return new Promise((resolve, reject) => {
  axios[method](url, params, Object.assign({}, config, {
  //1.通過(guò)將執(zhí)行程序函數(shù)傳遞給CancelToken構(gòu)造函數(shù)來(lái)創(chuàng)建cancel token
   cancelToken: new CancelToken(function executor (c) {
   //2.將cancel token存入列表
    sources.push(c)
   })
  })).then(response => {
   resolve(response.data)
  }, err => {
   if (err.Cancel) {
    console.log(err)
   } else {
    reject(err)
   }
  }).catch(err => {
   reject(err)
  })
 })
}

const post = (url, params, config = {}) => {
 return request(url, params, config, 'post')
}

const get = (url, params, config = {}) => {
 return request(url, params, config, 'get')
}
//3.導(dǎo)出cancel token列表供全局路由守衛(wèi)使用
export {sources, post, get}

...
import { sources } from '../service/request'
...
router.beforeEach((to, from, next) => {
 document.title = to.meta.title || to.name
  //路由發(fā)生變化時(shí)取消當(dāng)前頁(yè)面網(wǎng)絡(luò)請(qǐng)求
 sources.forEach(item => {
  item()
 })
 sources.length = 0
 next()
})

// 引入網(wǎng)絡(luò)請(qǐng)求庫(kù) https://github.com/axios/axios

import axios from 'axios'
import store from '../store'
import router from '../router'

// axios.defaults.timeout = 10000
const requestList = []

axios.defaults.headers.post['Content-Type'] = 'application/json;charset=UTF-8'

axios.defaults.baseURL = process.env.BASE_URL
// 自定義攔截器
axios.interceptors.request.use((config) => {
 requestList.push(config.url)
 store.dispatch('changeGlobalState', {loading: true})
 const token = store.getters.userInfo.token
 if (token) {
  config.headers.token = token
 }
 return config
}, function (error) {
 return Promise.reject(error)
})

axios.interceptors.response.use(function (response) {
 requestList.splice(requestList.findIndex(item => item === response.config.url), 1)
 if (requestList.length === 0) {
  store.dispatch('changeGlobalState', {loading: false})
 }
 if (response.data.code === 900401) {
  window.$toast.error('認(rèn)證失效，請(qǐng)重新登錄！', 1000)
  router.push('/login')
 }
 return response
}, function (error) {
 requestList.length = 0
 store.dispatch('changeGlobalState', {loading: false})
 if (axios.isCancel(error)) {
  throw new axios.Cancel('cancel request')
 } else {
  window.$toast.error('網(wǎng)絡(luò)請(qǐng)求失??！', 1000)
 }
 return Promise.reject(error)
})

const CancelToken = axios.CancelToken
let sources = []

const request = function (url, params, config, method) {
 return new Promise((resolve, reject) => {
  axios[method](url, params, Object.assign(config, {
   cancelToken: new CancelToken(function executor (c) {
    sources.push(c)
   })
  })).then(response => {
   resolve(response.data)
  }, err => {
   reject(err)
  }).catch(err => {
   reject(err)
  })
 })
}

const post = (url, params, config = {}) => {
 return request(url, params, config, 'post')
}

const get = (url, params, config = {}) => {
 return request(url, params, config, 'get')
}

export {sources, post, get}