select!!!!!!

 <el-select v-model="dept" filterable placeholder="请选择"  @change="getDept">

                              <el-option

                                v-for="item1 in subjectList"

                                :key="item1.dKey"

                                :label="item1.dValue"

                                :value="item1.dKey"

                              ></el-option>

</el-select>

  getDept(val) {

            var obj = {};

            obj = this.subjectList.find(function (item) {

                return item.dKey === val;

            });

            console.log(obj.dValue);

            console.log(val);

        }