Element-UI. el-select 选中对象

          <el-select
              size="small"
              style="flex-grow: 1;flex-basis: 0"
              v-model="selRole"
              placeholder="角色名称"
              value-key="yt2100"
              @change="onRoleSelected"

              >
            <el-option
                v-for="item in roleList "
                :key="item.yt2100"
                :label="item.yt2102"
                :value="item"


            >
            </el-option>
          </el-select>