修改

src/views/achievement/index.vue

@@ -41,7 +41,7 @@
               <el-option v-for="i in technologyList" :key="i._id" :label="i.label" :value="i.value"></el-option>
             </template>
             <template #area>
-              <el-cascader v-model="form.area" :props="{ value: 'label', label: 'label' }" :options="cityList" @change="handleChange" style="width: 100%" />
+              <el-cascader v-model="form.area" :props="{ value: 'label', label: 'label' }" :options="cityList" style="width: 100%" />
             </template>
             <template #file>
               <custom-upload model="file" :list="form.file" :limit="1" url="/files/web/template/upload" @change="onUpload"></custom-upload>

src/views/platform/demand/demand/index.vue

@@ -35,7 +35,7 @@
               <el-option v-for="i in methodList" :key="i._id" :label="i.label" :value="i.value"></el-option>
             </template>
             <template #area>
-              <el-cascader v-model="form.area" :props="{ value: 'label', label: 'label' }" :options="cityList" @change="handleChange" style="width: 100%" />
+              <el-cascader v-model="form.area" :props="{ value: 'label', label: 'label' }" :options="cityList" style="width: 100%" />
             </template>
           </custom-form>
         </el-col>

src/views/platform/demand/supply/index.vue

@@ -35,7 +35,7 @@
               <el-option v-for="i in methodList" :key="i._id" :label="i.label" :value="i.value"></el-option>
             </template>
             <template #area>
-              <el-cascader v-model="form.area" :props="{ value: 'label', label: 'label' }" :options="cityList" @change="handleChange" style="width: 100%" />
+              <el-cascader v-model="form.area" :props="{ value: 'label', label: 'label' }" :options="cityList" style="width: 100%" />
             </template>
           </custom-form>
         </el-col>