最近研究了一下vue cli@4.5.x + vue3 + typescript

引入elemlent ui 频繁出现报错

个人不建议使用 vue  add element 安装会有未知错误发生

以下是我总结出来的调试安装, 发现安装过程不断踩坑. 最后下面4个步骤解决

1. 安装必要依赖

npm install element-plus babel-plugin-import sass sass-loader@10.1.1 --save-dev

2. 配置babel.config.js

module.exports = {
  presets: [
    '@vue/cli-plugin-babel/preset'
  ],
  plugins: [
    [
      "import",
      {
        libraryName: 'element-plus',
        customStyleName: (name) => {
          name = name.slice(3)
          return `element-plus/packages/theme-chalk/src/${name}.scss`;
        },
      },
    ],
  ]
}

3. 在src目录下创建plugins文件夹，在plugins文件夹下创建ElementPlus.ts

import { App } from 'vue'

import {
    ElAlert,
    ElAside,
    ElAutocomplete,
    ElAvatar,
    ElBacktop,
    ElBadge,
    ElBreadcrumb,
    ElBreadcrumbItem,
    ElButton,
    ElButtonGroup,
    ElCalendar,
    ElCard,
    ElCarousel,
    ElCarouselItem,
    ElCascader,
    ElCascaderPanel,
    ElCheckbox,
    ElCheckboxButton,
    ElCheckboxGroup,
    ElCol,
    ElCollapse,
    ElCollapseItem,
    ElCollapseTransition,
    ElColorPicker,
    ElContainer,
    ElDatePicker,
    ElDialog,
    ElDivider,
    ElDrawer,
    ElDropdown,
    ElDropdownItem,
    ElDropdownMenu,
    ElFooter,
    ElForm,
    ElFormItem,
    ElHeader,
    ElIcon,
    ElImage,
    ElInput,
    ElInputNumber,
    ElLink,
    ElMain,
    ElMenu,
    ElMenuItem,
    ElMenuItemGroup,
    ElOption,
    ElOptionGroup,
    ElPageHeader,
    ElPagination,
    ElPopconfirm,
    ElPopover,
    ElPopper,
    ElProgress,
    ElRadio,
    ElRadioButton,
    ElRadioGroup,
    ElRate,
    ElRow,
    ElScrollbar,
    ElSelect,
    ElSlider,
    ElStep,
    ElSteps,
    ElSubmenu,
    ElSwitch,
    ElTabPane,
    ElTable,
    ElTableColumn,
    ElTabs,
    ElTag,
    ElTimePicker,
    ElTimeSelect,
    ElTimeline,
    ElTimelineItem,
    ElTooltip,
    ElTransfer,
    ElTree,
    ElUpload,
    ElInfiniteScroll,
    ElLoading,
    ElMessage,
    ElMessageBox,
    ElNotification
} from 'element-plus';

import "element-plus/packages/theme-chalk/src/base.scss"
import lang from 'element-plus/lib/locale/lang/zh-cn'
import 'dayjs/locale/zh-cn'
import { use } from 'element-plus/lib/locale'

// 设置语言
use(lang)

const components = [
    ElAlert,
    ElAside,
    ElAutocomplete,
    ElAvatar,
    ElBacktop,
    ElBadge,
    ElBreadcrumb,
    ElBreadcrumbItem,
    ElButton,
    ElButtonGroup,
    ElCalendar,
    ElCard,
    ElCarousel,
    ElCarouselItem,
    ElCascader,
    ElCascaderPanel,
    ElCheckbox,
    ElCheckboxButton,
    ElCheckboxGroup,
    ElCol,
    ElCollapse,
    ElCollapseItem,
    ElCollapseTransition,
    ElColorPicker,
    ElContainer,
    ElDatePicker,
    ElDialog,
    ElDivider,
    ElDrawer,
    ElDropdown,
    ElDropdownItem,
    ElDropdownMenu,
    ElFooter,
    ElForm,
    ElFormItem,
    ElHeader,
    ElIcon,
    ElImage,
    ElInput,
    ElInputNumber,
    ElLink,
    ElMain,
    ElMenu,
    ElMenuItem,
    ElMenuItemGroup,
    ElOption,
    ElOptionGroup,
    ElPageHeader,
    ElPagination,
    ElPopconfirm,
    ElPopover,
    ElPopper,
    ElProgress,
    ElRadio,
    ElRadioButton,
    ElRadioGroup,
    ElRate,
    ElRow,
    ElScrollbar,
    ElSelect,
    ElSlider,
    ElStep,
    ElSteps,
    ElSubmenu,
    ElSwitch,
    ElTabPane,
    ElTable,
    ElTableColumn,
    ElTabs,
    ElTag,
    ElTimePicker,
    ElTimeSelect,
    ElTimeline,
    ElTimelineItem,
    ElTooltip,
    ElTransfer,
    ElTree,
    ElUpload,
]

const plugins = [
    ElInfiniteScroll,
    ElLoading,
    ElMessage,
    ElMessageBox,
    ElNotification,
]

export const ElementPlus = {
    install: (app: App<Element>): void => {

        components.forEach((component) => {
            app.component(component.name, component)
        })

        plugins.forEach((plugin) => {
            app.use(plugin)
        })

        // 全局配置
        app.config.globalProperties.$ELEMENT = { size: 'small', zIndex: 3000 }
    }
}

4. 在main.ts文件中引入ElementPlus.ts文件

import { createApp } from 'vue'
import App from './App.vue'
import router from './router'
import store from './store'

import { ElementPlus } from "./plugins/ElementPlus";

createApp(App).use(store).use(router).use(ElementPlus).mount('#app')

5. 重新运行 npm run serve 

如果结果如下, 那么我祝你顺利成功引入.