Removed sn undefined warning (#572)

2021-08-03 01:09:43 -04:00
parent 2cd978b335
commit 838287a16d
1 changed files with 1 additions and 1 deletions
--- a/packages/rrweb/src/utils.ts
+++ b/packages/rrweb/src/utils.ts
@@ -39,7 +39,7 @@ export function createMirror(): Mirror {
    map: {},
    getId(n) {
      // if n is not a serialized INode, use -1 as its id.
-      if (!n.__sn) {
+      if (!n || !n.__sn) {
        return -1;
      }
      return n.__sn.id;