1.升级到4.0之后未能正常使用
处理：npm i webpack webpack-cli webpack-dev-server webpack-merge -D
2. Error: Plugin could not be registered at 'html-webpack-plugin-before-html-processing'. Hook was not found.
处理：由于html-webpack-plugin和webpack4.0未匹配，升级html-webpack-plugin插件
3. TypeError: Cannot read property 'vue' of undefine
处理：由于vue-loader和webpack4.0未匹配，需要升级vue-loader, npm i vue-loader -D，
并且修改配置build/webpack.base.conf.js，加入
plugins: [
new VueLoaderPlugin()
],资源搜索网站大全https://55wd.com 广州品牌设计公司http://www.maiqicn.com
4. Uncaught TypeError: Cannot assign to read only property 'exports' of object ‘#
解决：修改配置build/webpack.base.conf.js
把这段注释//include: [resolve('src'), resolve('test'), resolve('node_modules/webpack-dev-server/client')]
加入这段：include: [resolve('src'), resolve('test')]