1.首先使用指令进行安装

npm install element-plus --save

2.安装按需引入另外两个插件

npm install -D unplugin-vue-components unplugin-auto-import

3.在vite.config.js文件引入以下内容

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))
    }
  }
})

此时在App.vue引入button按钮，可看到效果如下，便引入成功：

 4.如果不想用上述色调，要定制自己的怎么操作，如下：

安装scss

npm i sass -D     (-D代表安装在开发环境的依赖)

准备定制样式文件（在styles文件创建element文件以及下的index.scss文件）

styles/element/index.scss

//index.scss内容
@forward "element-plus/theme-chalk/src/common/var.scss" with (
  $colors:(
  "primary":(
    "base":#27ba9b,
  ),
  "success":(
    "base":#1dc779,
  ),
  "warning":(
    "base":#ffb302,
  ),
  "danger":(
    "base":#e26237,
  ),
  "error":(
    "base":#cf4444,
  ),
  )
)

配置elementPlus采用sass样式配色系统

自动导入定制化样式文件进行样式覆盖

在vite.config.js文件

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({
    // 配置elementPlus采用sass样式配色系统
    resolvers: [ElementPlusResolver({ importStyle: "sass" })],
  }),
  ],
  resolve: {
    alias: {
      '@': fileURLToPath(new URL('./src', import.meta.url))
    }
  },
  // 自动导入定制化样式文件进行样式覆盖
  css: {
    preprocessorOptions: {
      scss: {
        additionalData: `@use "@/styles/element/index.scss" as *;`
      }
    }
  }
})

修改好配置文件记得重新启动哦~

样式如下，和官网样式对比有了很明显变化，证明起了作用：