使用vue-cli生成的项目。之前是webpack1.12.x的，现在升级了webpack3.6.0。vue(v2.5.2)。部分css样式错乱，检查后发现是css样式被覆盖了,加载顺序出现了问题。npm run dev，生产环境没发现这个问题。webpack1.12.x也没这个问题。

不知道是否是这个插件问题，ExtractTextPlugin。或者是我引用了bootstrap和element-ui有冲突。之前项目是用的bootstrap,升级后才换的element.
ps:webpack3.6.0的配置都是官方的模板，自己没动什么其他地方。
需要哪部分代码可以提问告知。?

new ExtractTextPlugin({
      filename: utils.assetsPath('css/[name].[contenthash].css'),
      // Setting the following option to `false` will not extract CSS from codesplit chunks.
      // Their CSS will instead be inserted dynamically with style-loader when the codesplit chunk has been loaded by webpack.
      // It's currently set to `true` because we are seeing that sourcemaps are included in the codesplit bundle as well when it's `false`, 
      // increasing file size: https://github.com/vuejs-templates/webpack/issues/1110
      allChunks: true,
    }),

main.js

//全局插件css
import './assets/css/animate.min.css' //全局的动画使用
import './assets/css/themify-icons.css' //theimfy字体图标
import './assets/css/icomoon-icons.css' //自定义字体图标
import './assets/css/icomoon2.css'  //二期自定义图标
import 'element-ui/lib/theme-chalk/index.css' //element样式单独引入
import './assets/css/element-variables.scss' //自定义主题颜色等
import '../node_modules/bootstrap/dist/css/bootstrap.min.css'
// import './assets/css/sweet-alert.css' //弹窗样式，如果用ele，考虑后期干掉
import './assets/css/jquery.steps.css' //有步骤时候的css，如入库质检
import './assets/css/first-layout.css' //整个框架的css,如侧边导航
import './assets/css/common.css' //全局公共样式
import './assets/css/reset-element.css'; //重置element-ui的css
//全局插件js
import $ from 'jquery'
import '../node_modules/bootstrap/dist/js/bootstrap.min.js'
import './assets/js/animo.min.js' //animate动画管理
import './assets/js/first-layout.js' //整个框架的js,如侧边导航
import './assets/js/jquery.qrcode.min.js' //条码二维码
import './assets/js/JsBarcode.code39.min.js' //条码二维码
import './assets/js/particles.js'; //首页的背景动画
import './assets/js/jquery.table2excel.js' // 导出为excle相关插件
//原型
import './golbal/vue_prototype.js'

// 百度地图
import BaiduMap from 'vue-baidu-map'
Vue.use(BaiduMap, {
    // ak 是在百度地图开发者平台申请的密钥 详见 http://lbsyun.baidu.com/apiconsole/key */
    ak: 'xxxxxxxx'
})

//element-ui
import ElementUI from 'element-ui'
Vue.use(ElementUI); //elment-ui

//vue相关插件
import Vue from 'vue'
import App from './App'

import router from './router' //引用路由
import store from './store/'


new Vue({
    el: '#app',
    router,
    store,
    template: '<App/>',
    components: { App }
})