要想在vue中使用jsx，需要安装vite提供的依赖

 npm install @vitejs/plugin-vue-jsx

 vite.config.js 文件中的 plugins 字段中添加 jsx 支持

import vueJsx from "@vitejs/plugin-vue-jsx";
export default defineConfig({
  plugins: [
    vueJsx(),
  ]
})

 放段代码吧。。。

实现一个树形组件，用jsx来写真的太舒服，太简单了

import { defineComponent, ref, reactive, onMounted } from 'vue'
import { Plus, Minus } from '@element-plus/icons-vue'
import './treeNodeCom.scss'

export default defineComponent({
    props: {
        data: {
            type: Array,
        },
        planList: {
            type: Array,
        },
    },
    emits: ['treeChange'],
    setup(props, { emit }) {
        // 原始数据
        const menuList = ref([
            {
                groupId: '',
                children: [],
            },
        ])

        // 叶子节点新增
        const addNode = (node) => {
            if (!node.children) {
                node.children = []
            }
            node.children.push({
                groupId: '',
                children: [],
            })
            // emit('treeChange', menuList.value)
        }
        //根节点新增
        const treeNode = () => {
            menuList.value.push({
                groupId: '',
                children: [],
            })
        }
        // 删除节点
        const deleteNode = (node, index) => {
            node.splice(index, 1)
            emit('treeChange', menuList.value)
        }

        const changeSelect = (e, node) => {
            emit('treeChange', menuList.value)
        }

        onMounted(() => {
            menuList.value = props.data?.length ? props.data : [{ groupId: '', children: [] }]
        })

        const renderMemu = (node, isFirst) => {
            return node.map((item, index) => {
                return (
                    <div class={isFirst ? 'treeSele firstTree' : 'treeSele'}>
                        <div class={'nodeItem'}>
                            <el-select v-model={item.groupId} placeholder="请选择" onChange={(e) => changeSelect(e, item)}>
                                {props.planList.map((opitem) => (
                                    <el-option label={opitem.name} value={opitem.id} />
                                ))}
                            </el-select>
                            <div class="iconBox" onClick={() => addNode(item)}>
                                <Plus style={{ height: '20px', color: '#409eff' }} />
                            </div>
                            {!(isFirst && node.length == 1) && (
                                <div class="iconBox deleteIcon" onClick={() => deleteNode(node, index)}>
                                    <Minus style={{ height: '20px', color: 'red' }} />
                                </div>
                            )}
                        </div>
                        {item.children && <div style={{ 'margin-left': '20px' }}>{renderMemu(item.children, false)}</div>}
                    </div>
                )
            })
        }

        const render = () => {
            return (
                <div>
                    <el-button type="primary" onClick={treeNode} style={{ marginBottom: '10px' }}>
                        新增根节点
                    </el-button>
                    <div> {renderMemu(menuList.value, true)}</div>
                </div>
            )
        }
        return render
    },
})