vue3的安装初始化及导入Element Plus

安装nodejs：

https://nodejs.org/en/download

安装vue：

https://cn.vuejs.org/guide/introduction.html

初始化项目：

npm init vue@latest

按照个人的喜好进行配置的勾选，比如：

✔ Project name: … <your-project-name>
✔ Add TypeScript? … No / Yes
✔ Add JSX Support? … No / Yes
✔ Add Vue Router for Single Page Application development? … No / Yes
✔ Add Pinia for state management? … No / Yes
✔ Add Vitest for Unit testing? … No / Yes
✔ Add Cypress for both Unit and End-to-End testing? … No / Yes
✔ Add ESLint for code quality? … No / Yes
✔ Add Prettier for code formatting? … No / Yes

安装Element Plus

https://element-plus.gitee.io/zh-CN/guide/installation.html

npm install element-plus --save

完整引用：main.js
import { createApp } from 'vue'
import App from './App.vue'
import router from './router'
import ElementPlus from 'element-plus'
import 'element-plus/dist/index.css'

createApp(App).use(router).use(ElementPlus).mount('#app')import { createApp } from 'vue'
import App from './App.vue'
import router from './router'
import './assets/main.css'
import ElementPlus from 'element-plus'
import 'element-plus/dist/index.css'

const app = createApp(App)

app.use(router)
app.use(ElementPlus)

app.mount('#app')

按需引用(推荐)：
npm install element-plus --save
npm install -D unplugin-vue-components unplugin-auto-import

变更vite.config.js
import { fileURLToPath, URL } from 'node:url'
import { defineConfig } from 'vite'
import vue from '@vitejs/plugin-vue'
import AutoImport from 'unplugin-auto-import/vite'
import Components from 'unplugin-vue-components/vite'
import { ElementPlusResolver } from 'unplugin-vue-components/resolvers'

// https://vitejs.dev/config/
export default defineConfig({
  plugins: [
    vue(),
    AutoImport({
      resolvers: [ElementPlusResolver()],
    }),
    Components({
      resolvers: [ElementPlusResolver()],
    }),
  ],
  resolve: {
    alias: {
      '@': fileURLToPath(new URL('./src', import.meta.url))
    }
  }
})