修改

src/views/system/trainingItem/index.vue

@@ -562,6 +562,7 @@
             style="width: 250px"
             v-model="form.trainingItemPrice"
             placeholder="请输入培训课程价格"
+            clearable
           />
         </el-form-item>
 
@@ -569,6 +570,7 @@
           <el-select
             v-model="form.buyFlag"
             placeholder="请选择"
+            clearable
             style="width: 250px"
           >
             <el-option
@@ -610,6 +612,7 @@
             oninput="value=value.replace(/[^\d]/g,'')"
             maxlength="5"
             style="width: 250px"
+            clearable
             v-model.number="form.trainingItemSort"
             placeholder="值越小,排名越靠前"
           />