main.js文件如下，加载的图片路径没有问题

import Vue from 'vue'
import App from './App'
import ElementUI from 'element-ui';
import VueLazyload from 'vue-lazyload'
import Vuex from './vuex/store'
import './global.css'
import 'element-ui/lib/theme-chalk/index.css';
import {createRouter} from "./router";
import './assets/iconfont/iconfont.css'
import 'babel-polyfill'
import  VueQuillEditor from 'vue-quill-editor'
// require styles 引入样式
import {get,post,postUp,postLogin,patch,del,postdel,put,posttree,posttree1} from './utils/https'
import {setCookie,delCookie,getCookie} from './utils/cookie'
import md5 from 'js-md5';
Vue.prototype.$md5 = md5;
Vue.prototype.$get = get

import 'quill/dist/quill.core.css'
import 'quill/dist/quill.snow.css'
import 'quill/dist/quill.bubble.css'

Vue.use(VueQuillEditor)
Vue.use(VueLazyload)

const router = createRouter()

Vue.use(Vuex)

Vue.config.productionTip = false


Vue.use(ElementUI);
Vue.use(VueLazyload, {
  // preLoad: 1.3,   //预加载的宽高比
  // error: 'dist/error.png',//图片加载失败时使用的图片源

  loading: './assets/mo.png',//图片加载的路径
  // loading:require('./assets/mo.png'),

  // attempt: 1,
  listenEvents:['scroll','wheel','mousewheel','resize','animationend','transitionend','touchmove'], //你想让vue监听的事件
})
/* eslint-disable no-new */
new Vue({
  el: '#app',
  router,
  components: { App },
  template: '<App/>'
})