问题修复

src/views/water/standard/standardForm.vue

           </el-select>
         </el-form-item>
         <el-form-item label="Ⅰ类" prop="categoryOne">
-          <el-input @blur="numChange('categoryOne')"
+          <el-input @blur="numChange('categoryOne')" maxlength="7"
                     oninput="value=value.replace(/[^\d.]/g,'')" clearable placeholder="mg/L"
                     size="small" v-model="ruleForm.categoryOne"></el-input>
         </el-form-item>
         <el-form-item label="Ⅱ类" prop="categoryTwo">
-          <el-input @blur="numChange('categoryTwo')"
+          <el-input @blur="numChange('categoryTwo')" maxlength="7"
                     oninput="value=value.replace(/[^\d.]/g,'')" clearable placeholder="mg/L"
                     size="small" v-model="ruleForm.categoryTwo"></el-input>
         </el-form-item>
         <el-form-item label="Ⅲ类" prop="categoryThree">
-          <el-input @blur="numChange('categoryThree')"
+          <el-input @blur="numChange('categoryThree')" maxlength="7"
                     oninput="value=value.replace(/[^\d.]/g,'')" clearable placeholder="mg/L"
                     size="small" v-model="ruleForm.categoryThree"></el-input>
         </el-form-item>
         <el-form-item label="Ⅳ类" prop="categoryFour">
-          <el-input @blur="numChange('categoryFour')"
+          <el-input @blur="numChange('categoryFour')" maxlength="7"
                     oninput="value=value.replace(/[^\d.]/g,'')" clearable placeholder="mg/L"
                     size="small" v-model="ruleForm.categoryFour"></el-input>
         </el-form-item>
         <el-form-item label="Ⅴ类" prop="categoryFive">
-          <el-input @blur="numChange('categoryFive')"
+          <el-input @blur="numChange('categoryFive')" maxlength="7"
                     oninput="value=value.replace(/[^\d.]/g,'')" clearable placeholder="mg/L"
                     size="small" v-model="ruleForm.categoryFive"></el-input>
         </el-form-item>