fix(tree-menu): [tree-menu] the search box supports custom placeholder (#1867)

examples/sites/demos/apis/tree-menu.js

@@ -78,6 +78,17 @@ export default {
           mode: ['pc'],
           pcDemo: 'show-expand'
         },
+        {
+          name: 'placeholder',
+          type: 'string',
+          defaultValue: '',
+          desc: {
+            'zh-CN': '当数据为空时的占位符',
+            'en-US': 'Placeholder when data is empty'
+          },
+          mode: ['pc'],
+          pcDemo: 'basic-usage'
+        },
         {
           name: 'data',
           typeAnchorName: 'ITreeNodeData',

examples/sites/demos/pc/app/tree-menu/basic-usage-composition-api.vue

@@ -1,5 +1,5 @@
 <template>
-  <tiny-tree-menu></tiny-tree-menu>
+  <tiny-tree-menu placeholder="请输入内容进行筛选"></tiny-tree-menu>
 </template>
 
 <script setup>

examples/sites/demos/pc/app/tree-menu/basic-usage.vue

@@ -1,5 +1,5 @@
 <template>
-  <tiny-tree-menu></tiny-tree-menu>
+  <tiny-tree-menu placeholder="请输入内容进行筛选"></tiny-tree-menu>
 </template>
 
 <script>