main.ts(js)中

import { createApp } from 'vue'
import App from './App.vue'
import ElementPlus from 'element-plus'
import * as ElIconModules from '@element-plus/icons-vue'
import zhCn from 'element-plus/es/locale/lang/zh-cn'

const app = createApp(App)
  .use(ElementPlus, {
    size: 'small',
    locale: zhCn
  })

Object.keys(ElIconModules).forEach(function(key) {
  app.component(ElIconModules[key].name, ElIconModules[key])
})
app.mount('#app')