elementui select中添加新增标签

 <el-select v-model="ruleForm.eventType" :placeholder="`请选择事件类型，可手动添加`" ref="template" clearable @visible-change="(v) => visibleChange(v, 'template')"><el-option v-for="item in eventTypeOptions" :key="item.value" :label="item.label" :value="item.value">{{ item.label }}<div class="flag" @click="showShipTemplate(item.code, true)"></div></el-option></el-select>

 ruleForm: {eventType: "",},eventTypeOptions: [{value: "1",label: "水污染",},{value: "2",label: "水污染1",},],

    showShipTemplate() {this.$prompt(`请输入新的类型`, "提示", {confirmButtonText: "确定",cancelButtonText: "取消",inputValidator: (value) => {//非空验证if (!value) {return "请输入内容";}},}).then(({ value }) => {this.ruleForm.eventType = value;this.eventTypeOptions.push({value: value,label: value,});console.log("确定");}).catch(() => {this.$message({type: "info",message: "取消输入",});});},visibleChange(visible, refName) {this.$nextTick(() => {if (visible) {const ref = this.$refs[refName];let popper = ref.$refs.popper;if (popper.$el) popper = popper.$el;if (!Array.from(popper.children).some((v) => v.className === "el-template-menu__list")) {const el = document.createElement("ul");el.className = "el-template-menu__list";el.style ="border-bottom:2px solid rgb(219 225 241); padding:0; color:rgb(64 158 255);font-size: 13px;margin: 0px;text-align: center; ";el.innerHTML = `<li class="el-cascader-node text-center" style="height:36px;line-height: 36px;"><span class="el-cascader-node__label"><i class="font-blue el-icon-plus"></i>新增类型</span></li>`;// console.log(popper.childNode,'sssssssssssssss')// console.log(popper.children[0], "231111111111");// console.log(popper, "popper");if (this.isUp) {popper.insertBefore(el, popper.children[0]);} else {popper.appendChild(el);}el.onclick = () => {this.showShipTemplate(null, false);};}}});},