Complete steps to use element in vue3.0

import 'element-plus/lib/theme-chalk/index.css'
import ElementPlus from 'element-plus'
 
const app = createApp(App)
app.use(ElementPlus)
app.use(store).use(router).mount('#app')

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,
 ElTabs,
 // ElTable,
 // ElTableColumn,
 // ElTimeline,
 // ElTimelineItem,
 ElTooltip,
 // ElTransfer,
 // ElTree,
 // ElUpload,
 // ElInfiniteScroll,
 // ElLoading,
 // ElMessage,
 ElMessageBox,
 ElNotification
} from 'element-plus'
import lang from 'element-plus/lib/locale/lang/zh-cn'
import locale from 'element-plus/lib/locale'
 
export default (app) => {
 locale.use(lang)
 app.use(ElButton)
 app.use(ElNotification)
 app.use(ElContainer)
 app.use(ElAside)
 app.use(ElHeader)
 app.use(ElMain)
 app.use(ElDropdown)
 app.use(ElDropdownItem)
 app.use(ElDropdownMenu)
 app.use(ElTabPane)
 app.use(ElTabs)
 app.use(ElMenu)
 app.use(ElMenuItem)
 app.use(ElMenuItemGroup)
 app.use(ElSubmenu)
 app.use(ElTooltip)
 app.use(ElPopper)
 app.use(ElPopconfirm)
 app.use(ElMessageBox)
 app.use(ElInput)
 app.use(ElForm)
 app.use(ElFormItem)
}