Merge pull request #18251 from nnnnoel/patch-3

fix(chore): add type guard for globalWindow
storybookjs · Jul 6, 2022 · 2d3cfe5 · 2d3cfe5
2 parents 4dd5872 + 846d3fd
commit 2d3cfe5
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/lib/channel-postmessage/src/index.ts b/lib/channel-postmessage/src/index.ts
@@ -35,7 +35,9 @@ export class PostmsgTransport {
   constructor(private readonly config: Config) {
     this.buffer = [];
     this.handler = null;
-    globalWindow.addEventListener('message', this.handleEvent.bind(this), false);
+    if (globalWindow) {
+      globalWindow.addEventListener('message', this.handleEvent.bind(this), false);
+    }
 
     // Check whether the config.page parameter has a valid value
     if (config.page !== 'manager' && config.page !== 'preview') {