基于vue+element實(shí)現(xiàn)全局loading過(guò)程的案例分析

//全局頁(yè)面跳轉(zhuǎn)是否啟用loading
export const routerLoading = true;

//全局api接口調(diào)用是否啟用loading
export const apiLoading = true;

//loading參數(shù)配置
export const loadingConfig = {
 lock: true,
 text: 'Loading',
 spinner: 'el-icon-loading',
 background: 'rgba(0, 0, 0, 0.7)'
}

import ElementUI from 'element-ui';
import {loadingConfig} from '../src/config/index' //全局的一個(gè)基本參數(shù)配置

var loading = null ;
const loadingShow = () => {
 loading = ElementUI.Loading.service(loadingConfig);
}

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

const loadingObj={
 loadingShow,
 loadingHide
}

export default loadingObj

// The Vue build version to load with the `import` command
// (runtime-only or standalone) has been set in webpack.base.conf with an alias.
import Vue from 'vue'
import App from './App'
import router from './router'
import ElementUI from 'element-ui';
import 'element-ui/lib/theme-chalk/index.css';

import glo_loading from '../loading/index' //loading組件的簡(jiǎn)單封裝
import {routerLoading} from '../src/config/index' //全局的頁(yè)面跳轉(zhuǎn)loading是否啟用

Vue.use(ElementUI);

Vue.config.productionTip = false

/* eslint-disable no-new */
new Vue({
 el: '#app',
 router,
 components: { App },
 template: '<App/>'
})

//從后臺(tái)獲取的用戶角色
const role = 'user'
//當(dāng)進(jìn)入一個(gè)頁(yè)面是會(huì)觸發(fā)導(dǎo)航守衛(wèi) router.beforeEach 事件
router.beforeEach((to,from,next) => {
 routerLoading &#63; glo_loading.loadingShow() : '' //如果全局啟用頁(yè)面跳轉(zhuǎn)則加載loading
 if(to.meta.roles){
  if(to.meta.roles.includes(role)){
   next() //放行
  }else{
   next({path:"/404"}) //跳到404頁(yè)面
  }
 }else{
  next() //放行
 }
routerLoading &#63; glo_loading.loadingHide() : ''//關(guān)閉loading層
})

// 添加請(qǐng)求攔截器
service.interceptors.request.use(function (config) {
 // 在發(fā)送請(qǐng)求之前做些什么
 apiLoading ? glo_loading.loadingShow() : ''//全局loading是否啟用
 return config;
}, function (error) {
 // 對(duì)請(qǐng)求錯(cuò)誤做些什么
 console.log(error);
 return Promise.reject(error);
});

// 添加響應(yīng)攔截器
service.interceptors.response.use(function (response) {
 // 對(duì)響應(yīng)數(shù)據(jù)做點(diǎn)什么
 if(response.status == 200){
   return response.data;
 }else{
  Promise.reject();
 }
}, function (error) {
 // 對(duì)響應(yīng)錯(cuò)誤做點(diǎn)什么
 console.log(error);
 apiLoading ? glo_loading.loadingHide() : ''
 return Promise.reject(error);
});