Vue前端实现输入框过滤可选项的过滤效果

<el-form-item label="开户支行:" prop="branchName">
          <el-autocomplete
            v-model="form.branchName"
            popper-class="my-autocomplete"
            :fetch-suggestions="queryBranchSearch"
            value-key="branchName"
            placeholder="请输入内容"
            style="width: 100%;"
            clearable
            :disabled="reviewFlag"
            @select="handleBranchSelect"
          >
            <template slot-scope="{ item }">
              <div class="name" :title="item.branchName">{
    
    {
    
     item.branchName }}</div>
            </template>
          </el-autocomplete>
        </el-form-item>

    queryBranchSearch(queryString, cb) {
    
    
      var results = queryString ? this.bankBranchList.filter((provinceCity) => provinceCity.branchName.toLowerCase().match(queryString.toLowerCase()) !== null) : this.bankBranchList;
      // 调用 callback 返回建议列表的数据
      clearTimeout(this.timeout);
      this.timeout = setTimeout(() => {
    
    
        cb(results);
      }, 600);
    },
   handleBranchSelect(item) {
    
    
      this.form.branchNo = item.branchId || '';
    },