<el-cascaderv-model="updateForm.category"separator="-":props="cascaderProps"
></el-cascader>

cascaderProps: {multiple: true,checkStrictly: true,lazy: true,lazyLoad: this.lazyLoad,value: "id",label: "name",leaf: "leaf"
}

//编辑类目async updateBtnClick(node, data) {this.node = node.parent;
this.updateForm.id = data.id;
this.updateForm.name = data.name;this.updateForm.level = ["一级类目", "二级类目", "三级类目", "四级类目"][node.level - 1];this.updateForm.parent_name = node.level > 1 ? node.parent.data.name : "";this.updateForm.category = data.category || [];// this.updateForm.category_name = data.category_name || [];this.category_array = Array.from(new Set(this.updateForm.category.join(",").split(",")));this.initOptions();},//初始化categoryasync initOptions() {let req = {parent_id: 0,category_id: this.node.id || 0};let res = await this.$api.getFrontcategoryTemp(req);if (res.error_code == 0 && res.data && res.data.list) {this.cascaderOptions = await this.loadOptions(res.data.list || []);this.updateForm.visible = true;}},//递归加载子类目async loadOptions(category) {let array = [];for (let i = 0; i < category.length; i++) {if (category[i].child_count > 0 &&this.category_array.includes(category[i].id + "")) {let req = {parent_id: category[i].id,category_id: this.node.id || 0};let res = await this.$api.getFrontcategoryTemp(req);if (res.error_code == 0 && res.data && res.data.list) {category[i].children = await this.loadOptions(res.data.list);}}array.push(category[i]);}return array;}

<el-cascaderv-model="updateForm.category"separator="-":options="cascaderOptions":props="cascaderProps"
></el-cascader>

[[1,10,101],[1,11,115],[2,20,201,2014]]
//可以去掉最后一位
[[1,10],[1,11],[2,20,201]]
//这样可以减少很多请求