Demo fixes for v4

src/views/uikit/TreeDoc.vue

@@ -0,0 +1,32 @@
+<script setup>
+import { onMounted, ref } from 'vue';
+import { NodeService } from '@/service/NodeService';
+
+const treeValue = ref(null);
+const selectedTreeValue = ref(null);
+const treeTableValue = ref(null);
+const selectedTreeTableValue = ref(null);
+const nodeService = new NodeService();
+
+onMounted(() => {
+    nodeService.getTreeNodes().then((data) => (treeValue.value = data));
+    nodeService.getTreeTableNodes().then((data) => (treeTableValue.value = data));
+});
+</script>
+
+<template>
+    <div class="card">
+        <h5 class="mb-4">Tree</h5>
+        <Tree :value="treeValue" selectionMode="checkbox" v-model:selectionKeys="selectedTreeValue"></Tree>
+    </div>
+
+    <div class="card">
+        <h5 class="mb-4">TreeTable</h5>
+        <TreeTable :value="treeTableValue" selectionMode="checkbox" v-model:selectionKeys="selectedTreeTableValue">
+            <template #header> FileSystem </template>
+            <Column field="name" header="Name" :expander="true"></Column>
+            <Column field="size" header="Size"></Column>
+            <Column field="type" header="Type"></Column>
+        </TreeTable>
+    </div>
+</template>