element-plus/packages/popper/src/renderers/arrow.ts

A Component Library for Vue3.0

import { openBlock, createBlock, Comment } from 'vue'
import { PatchFlags } from '@element-plus/utils/vnode'

export default function renderArrow(showArrow: boolean) {
  return showArrow
    ? (openBlock(),
    createBlock(
      'div',
      {
        ref: 'arrowRef',
        class: 'el-popper__arrow',
        'data-popper-arrow': '',
      },
      null,
      PatchFlags.NEED_PATCH,
    ))
    : (openBlock(), createBlock(Comment, null, ''))
}