历史回述单击

@@ -186,6 +186,10 @@ export default {
       graph.data(data);
       graph.render();
 
+      graph.on('node:click', e => {
+        alert(e);
+      });
+
       graph.on('node:mouseenter', e => {
         graph.setItemState(e.item, 'active', true)
       });