第一步：配置axios

首先，创建一个axios.js，这里面存放的时axios的配置以及拦截器等，最后导出一个axios对象。我平常elementUI用的比较多，这里你也可以使用自己的UI库。

    import axios from 'axios'
    import {MessageBox} from 'element-ui'
    //请求拦截
    axios.interceptors.request.use(config => {
        config.timeout = 15000
        return config
    }, error => {
        return Promise.reject(error)
    })
    //响应拦截
    axios.interceptors.response.use(response => {
        return response
    }, error => {
        return Promise.resolve(error.response)
    })

    function checkStatus (response) {
        // loading
        if(response == undefined ){
            alert('请求超时')
        }
        // 如果http状态码正常，则直接返回数据
        if (response.data.State === 400) {
            alert(response.data.Msg)
            return false
        }
        if (response && (response.status === 200 || response.status === 304 || response.status === 400)) {
            return response
            // 如果不需要除了data之外的数据，可以直接 return response.data
        }
        // 异常状态下，把错误信息返回去
        return {
            status: -404,
            msg: alert('404')
        }
    }
    export default {
        post (url, data) {
            return axios({
                method: 'post',
                url,
                data,
                headers: {
                    'X-Requested-With': 'XMLHttpRequest',
                    // "token":'14a1347f412b319b0fef270489f'
                }
            }).then(
                (response) => {
                    return checkStatus(response)
                }
            )
        },
        get (url, params) {
            return axios({
                method: 'get',
                url,
                params, // get 请求时带的参数
                headers: {
                    'X-Requested-With': 'XMLHttpRequest'
                }
            }).then(
                (response) => {
                    return checkStatus(response)
                }
            )
        }
    }

页面使用

<script>
import axios from '../../utils/axios'
export default {
  methods：{
    async getTeachingMaterials() {
      let params = {}
      const res = await axios.post('http://',params)
    },
  }
}
</script>

如果需要吧 Loading 封装进来

首先创建 loading.js

import { Loading } from 'element-ui';
let loadingCount = 0;
let loading;

const startLoading = () => {
  loading = Loading.service({
    lock: true,
    text: '拼命加载中...',//可以自定义文字
    spinner:'el-icon-loading',//自定义加载图标类名
    background: 'rgba(255,255,255,.4)',//遮罩层背景色
    target:'#content-box'//选定模态框遮罩DOM
  });
};

const endLoading = () => {
  loading.close();
};

export const showLoading = () => {
  if (loadingCount === 0) {
    startLoading();//开启加载框
  }
  loadingCount += 1;//请求进来加一
};

export const hideLoading = () => {
  if (loadingCount <= 0) {
    return;
  }
  loadingCount -= 1;//请求响应减一
  if (loadingCount === 0) {
    endLoading();//接口加载完关闭
  }
};

    import axios from 'axios'
    import {MessageBox} from 'element-ui'
    import { showLoading, hideLoading } from './loading';
    //请求拦截
    axios.interceptors.request.use(config => {
        showLoading()//开启
        config.timeout = 15000
        return config
    }, error => {
        return Promise.reject(error)
    })
    //响应拦截
    axios.interceptors.response.use(response => {
        setTimeout(()=>{
            hideLoading()//关闭
        },1000)
        return response
    }, error => {
        return Promise.resolve(error.response)
    })

    function checkStatus (response) {
        // loading
        if(response == undefined ){
            alert('请求超时')
            hideLoading();
        }
        // 如果http状态码正常，则直接返回数据
        if (response.data.State === 400) {
            alert(response.data.Msg)
            return false
        }
        if (response && (response.status === 200 || response.status === 304 || response.status === 400)) {
            return response
            // 如果不需要除了data之外的数据，可以直接 return response.data
        }
        // 异常状态下，把错误信息返回去
        return {
            status: -404,
            msg: alert('404')
        }
    }
    export default {
        post (url, data) {
            return axios({
                method: 'post',
                url,
                data,
                headers: {
                    'X-Requested-With': 'XMLHttpRequest',
                    // "token":'14a1347f412b319b0fef270489f'
                }
            }).then(
                (response) => {
                    return checkStatus(response)
                }
            )
        },
        get (url, params) {
            return axios({
                method: 'get',
                url,
                params, // get 请求时带的参数
                headers: {
                    'X-Requested-With': 'XMLHttpRequest'
                }
            }).then(
                (response) => {
                    return checkStatus(response)
                }
            )
        }
    }

当然也可以吧ipi封装一下小伙伴们可以自己尝试一下新建一个api.js