<template>
 <div class="loading">
 <van-loading size="36px" vertical>加载中...</van-loading>
 </div>
</template>

<script>
export default {
 props: {},
 data() {
 return {};
 },
 computed: {},
 created() {},
 mounted() {},
};
</script>

<style scoped>
</style>

<loading v-show="isLoading"></loading>
import { mapState } from "vuex";
import loading from "./components/loading";

 computed: {
 ...mapState(["isLoading"])
 },
 components: {
 loading
 },

//css
.loading {
 width: 100%;
 height: 100%;
 left: 0;
 top: 0;
 position: fixed;
 padding-top: 5.333333rem;
}

import Vue from 'vue'
import Vuex from 'vuex'
Vue.use(Vuex)

const store = new Vuex.Store({
 state: {
 isLoading: false//loading全局开关
 },
 mutations: {
 changeisLoading(state, data) {
 state.isLoading = data
 }
 },
})
export default store

// 请求拦截器
axios.interceptors.request.use(
 config => {
 // 改变vuex中的isLoading状态数据，当为true，loading显示
 store.state.isLoading = true
 return config;
 },
 error => {
 return Promise.error(error);
 }
);

// 响应拦截器
axios.interceptors.response.use(
 response => {
 // 如果返回的状态码为200，说明接口请求成功，可以正常拿到数据
 // 否则的话抛出错误
 if (response.status === 200) {
 //loading隐藏
 store.state.isLoading = false
 return Promise.resolve(response);
 } else {
 return Promise.reject(response);
 }
 },
 error => {
 if (error.response.status) {
 return Promise.reject(error.response);
 }
 }
);

devServer: {
 compress: true,
 disableHostCheck: true, //webpack4.0 开启热更新
 }