1. The code is as follows
        renderContent(h, { node, data, store }) {
            return (
            <span class="custom-tree-node">
                <span class="iconfont icon-wenjianjia"></span>
                <span class="tree-node-name">{node.label}</span>
                <el-dropdown class="MenueTreeDrop" trigger="click">
                    <span class="el-dropdown-link">
                        <i class="el-icon-arrow-right"></i>
                    </span>
                    <el-dropdown-menu slot="dropdown">
                        <el-dropdown-item on-click={ () => this.treeAddShowDialog(data,"add")}></el-dropdown-item>
                        <el-dropdown-item on-click={ () => this.treeAddShowDialog(data,"edite")}></el-dropdown-item>
                        <el-dropdown-item on-click={ () => this.delWorkUnite(data)}></el-dropdown-item>
                    </el-dropdown-menu>
                </el-dropdown>
            </span>);
        }, 2. It is found that neither  on-click  nor  onClick  takes effect. The reason for 
 is that if you write click events in  element ui  drop-down components, you must  @ native.click  to use native click events. However, native click events are not supported in the  jsx  syntax. 
 3. How on earth should I write click events here? Thank you 
