用脚手架创建Vue3遇到的项目结构Vue3+element-plus+echarts+axios+高德图+sass插件包amfe-flexible+postcss-pxtorem,vuex-persistedstate,sass-loader创建前提1.将脚手架升级到最新2.将npm升级到最新注意：以管理员权限操作npmi-gnpmcnpmi-gcnpmerror/warningerror:'XXX'isdefinedbutneverused(no-unused-vars)//解决方法：在package.json中加入“rules”:{"generator-star-spacing":"off","no-tabs":"off","no-unused-vars":"off","no-console":"off","no-irregular-whitespace":"off","no-debugger":"off"}Error:PostCSSpluginpostcss-pxtoremrequiresPostCSS8."//解决方法，降级for:"postcss-pxtorem":"^5.1.1",Error:Cannotfindmodule'vue-loader-v16/package.json'//用npm安装替换cnpm安装"export'default'(importedas'echarts')wasnotfoundin'echarts'//改为import*asechartsfrom"echarts";sass-loader//更改版本为"sass-loader":"^7.1.1"错误：模板根只需要一个元素原因：不支持多个根元素/*在.eslintrc.js文件中，更改"plugin:vue/essential"扩展为"plugin:vue/vue3-essential"*/
