Vue3 按需引入element

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

在Vue.config.js

    const AutoImport = require('unplugin-auto-import/webpack')
    const Components = require('unplugin-vue-components/webpack')
    const { ElementPlusResolver } = require('unplugin-vue-components/resolvers')

    module.exports = defineConfig({
      configureWebpack: {
        plugins: [
          AutoImport({
            resolvers: [ElementPlusResolver()],
          }),
          Components({
            resolvers: [ElementPlusResolver()],
          }),
        ]
      }
    })