update Tree Render function

src/components/tree/node.vue

@@ -113,9 +113,10 @@
             node () {
                 const Tree = findComponentUpward(this, 'Tree');
                 if (Tree) {
-                    return Tree.flatState.find(item => item.nodeKey === this.data.nodeKey);
+                    // 将所有的 node（即flatState）和当前 node 都传递
+                    return [Tree.flatState, Tree.flatState.find(item => item.nodeKey === this.data.nodeKey)];
                 } else {
-                    return {};
+                    return [];
                 }
             }
         },

src/components/tree/render.js

@@ -4,11 +4,12 @@ export default {
     props: {
         render: Function,
         data: Object,
-        node: Object
+        node: Array
     },
     render: (h, ctx) => {
         const params = {
-            node: ctx.props.node,
+            root: ctx.props.node[0],
+            node: ctx.props.node[1],
             data: ctx.props.data
         };
         return ctx.props.render(h, params);