只有一个节点时不显示

.gitignore

@@ -36,3 +36,4 @@ jspm_packages
 
 .idea/
 coverage
+.DS_Store

dist/demo.css

@@ -6589,19 +6589,4 @@ input.u-button[type="submit"] {
     right: 7px;
     color: rgba(0, 0, 0, 0.65); }
 
-.u-tree-searchable-filter {
-  color: #f50;
-  transition: all .3s ease; }
-
-.title-middle {
-  display: inline-block;
-  vertical-align: middle; }
-
-.edit-icon {
-  float: right;
-  font-size: 14px; }
-
-.title-con {
-  min-width: 150px; }
-
 /*# sourceMappingURL=demo.css.map */

src/TreeNode.js

@@ -214,13 +214,14 @@ class TreeNode extends React.Component {
     }
     const children = props.children;
     let newChildren = children;
+    let allTreeNode = undefined;
+    if (Array.isArray(children)) {
+      allTreeNode = children.every(function (item) {
+        return item.type === TreeNode;
+      });
+    }
      //如果props.children的长度大于0才可以生成子对象
-    if (children && (children.length > 0) && 
-      (children.type === TreeNode ||
-        Array.isArray(children) &&
-        children.every((item) => {
-          return item.type === TreeNode;
-        }))) {
+    if (children &&  (children.type === TreeNode || allTreeNode)){
       const cls = {
         [`${props.prefixCls}-child-tree`]: true,
         [`${props.prefixCls}-child-tree-open`]: props.expanded,