revert: tree watch logic

components/vc-tree/src/Tree.jsx

@@ -27,6 +27,16 @@ import {
  * other props can pass with context for future refactor.
  */
 
+function getWatch(keys = []) {
+  const watch = {};
+  keys.forEach(k => {
+    watch[k] = function() {
+      this.needSyncKeys[k] = true;
+    };
+  });
+  return watch;
+}
+
 const Tree = {
   name: 'Tree',
   inheritAttrs: false,
@@ -129,17 +139,19 @@ const Tree = {
   },
 
   watch: {
-    // ...getWatch([
-    //   'treeData',
-    //   'children',
-    //   'expandedKeys',
-    //   'autoExpandParent',
-    //   'selectedKeys',
-    //   'checkedKeys',
-    //   'loadedKeys',
-    // ]),
+    // watch 引用类型的改变
+    ...getWatch([
+      'treeData',
+      'children',
+      'expandedKeys',
+      'autoExpandParent',
+      'selectedKeys',
+      'checkedKeys',
+      'loadedKeys',
+    ]),
     __propsSymbol__() {
       this.setState(this.getDerivedState(getOptionProps(this), this.$data));
+      this.needSyncKeys = {};
     },
   },
 
@@ -149,8 +161,9 @@ const Tree = {
       const newState = {
         _prevProps: { ...props },
       };
+      const self = this;
       function needSync(name) {
-        return (!_prevProps && name in props) || (_prevProps && _prevProps[name] !== props[name]);
+        return (!_prevProps && name in props) || (_prevProps && self.needSyncKeys[name]);
       }
 
       // ================== Tree Node ==================