fix: error thrown when triggering undo after save schema on SchemaPane

LeoYuan · JackLian · commit 9be46e7b34e3 · 2022-07-08T09:06:22.000+08:00
diff --git a/packages/designer/src/document/node/modal-nodes-manager.ts b/packages/designer/src/document/node/modal-nodes-manager.ts
@@ -3,6 +3,7 @@ import { Node } from './node';
 import { DocumentModel } from '../document-model';
 
 function getModalNodes(node: Node) {
+  if (!node) return [];
   let nodes: any = [];
   if (node.componentMeta.isModal) {
     nodes.push(node);
