make WebRequest.on optional (#1899)

microsoft · Mar 12, 2020 · d49e3e6 · d49e3e6
1 parent 0f61f91
commit d49e3e6
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/libraries/botbuilder/src/interfaces/webRequest.ts b/libraries/botbuilder/src/interfaces/webRequest.ts
@@ -47,5 +47,5 @@ export interface WebRequest {
      * 
      * @returns A reference to the request object.
      */
-    on(event: string, ...args: any[]): any;
+    on?(event: string, ...args: any[]): any;
 }