Stub broadcast channel for unspported contexts (#2175)

src/lib/broadcast/index.ts

@@ -1,11 +1,2 @@
-export default class BroadcastChannel {
-  constructor(public name: string) {}
-  postMessage(_data: any) {}
-  close() {}
-  onmessage: (event: MessageEvent) => void = () => {}
-  addEventListener(_type: string, _listener: (event: MessageEvent) => void) {}
-  removeEventListener(
-    _type: string,
-    _listener: (event: MessageEvent) => void,
-  ) {}
-}
+import Stub from '#/lib/broadcast/stub'
+export default Stub

src/lib/broadcast/index.web.ts

@@ -1 +1,2 @@
-export default BroadcastChannel
+import Stub from '#/lib/broadcast/stub'
+export default 'BroadcastChannel' in window ? window.BroadcastChannel : Stub

src/lib/broadcast/stub.ts

@@ -0,0 +1,11 @@
+export default class BroadcastChannel {
+  constructor(public name: string) {}
+  postMessage(_data: any) {}
+  close() {}
+  onmessage: (event: MessageEvent) => void = () => {}
+  addEventListener(_type: string, _listener: (event: MessageEvent) => void) {}
+  removeEventListener(
+    _type: string,
+    _listener: (event: MessageEvent) => void,
+  ) {}
+}