表单校验中使用v-if和v-else来判断是否要校验时的注意项

<el-col v-if="newEditFlag" key="1" :span="8">
              <el-form-item label="联系电话：" prop="startUserTel">
                <el-input v-model="basicInfo.startUserTel" placeholder="请输入" />
              </el-form-item>
            </el-col>
            <el-col v-else key="2" :span="8">
              <el-form-item label="联系电话：">
                <el-input v-model="basicInfo.startUserTel" disabled />
              </el-form-item>
            </el-col>

　　绑定key值