解决级联下拉菜单的样式问题

src/main.js

@@ -18,6 +18,7 @@ import Print from 'vue-print-nb'
 import * as echarts from 'echarts'
 import ElementUI from 'element-ui'
 import Contextmenu from 'vue-contextmenujs'
+import 'element-ui/lib/theme-chalk/index.css'
 
 Vue.use(VueCookie)
 Vue.use(SuperFlow)

src/views/modules/warehouse/stock.vue

@@ -9,9 +9,9 @@
           <el-form-item label="类别">
             <el-cascader
               v-model="dataForm.materialTypeId"
-              placeholder="请输入"
               :options="optionsCate"
-              :props="{ expandTrigger: 'hover' }">
+              :props="{ expandTrigger: 'hover' }"
+              :show-all-levels="false">
             </el-cascader>
           </el-form-item>
           <el-form-item>