element-ui中 右击显示下拉菜单

1.<el-row>
	<el-col v-for="item in data" @contextmenu.prevent.native="rightClick(item)">
		 <el-dropdown trigger="click" :ref="`work_flow_${item.name}`">
			 <----展示的内容--->
			 <el-dropdown-menu slot="dropdown">
				 <el-dropdoen-item @click.native="edit" >/el-dropdoen-item>
				<el-dropdoen-item @click.native="add" ></el-dropdoen-item>
			</el-dropdown-menu >
		</el-dropdown>
	</el-col>
</el-row>
methods:{
	rightClick(item) {
		const name = `work_flow_${item.name}`;
		this.$refs[name][0].show();     // 这步最关键，让下拉菜单显示
	}
}