select option 下拉匹配

filterOption(input, option) {
        return (
          option.componentOptions.children[0].text
            .toLowerCase()
            .indexOf(input.toLowerCase()) >= 0
        );
      },

 <a-select v-model="queryParams.normsName" 
                  showSearch
                  placeholder="请选择/输入"
                  :filterOption="filterOption">
          <a-select-option
            v-for="(item,index) in NormsNameList"
            :value="item"
            :key="index"
          >{{ item }}</a-select-option>
        </a-select>`