From c4eb501343758e536e9bd6c71c7a16d1042025d8 Mon Sep 17 00:00:00 2001
From: Olof Dahlbom <olof.dahlbom@me.com>
Date: Wed, 28 Feb 2018 19:10:13 +0100
Subject: [PATCH] Emit warnings after off is called (#1513)

* Emit warnings after off is called

If a handler has been registered, and then gets unregistered, the key/methodname still exists in the map and signalr does not warn about a missing handler. Might be by design, but I like it this way.
---
 client-ts/signalr/src/HubConnection.ts | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/client-ts/signalr/src/HubConnection.ts b/client-ts/signalr/src/HubConnection.ts
index ab5682f96c..16accc998a 100644
--- a/client-ts/signalr/src/HubConnection.ts
+++ b/client-ts/signalr/src/HubConnection.ts
@@ -267,6 +267,9 @@ export class HubConnection {
         const removeIdx = handlers.indexOf(method);
         if (removeIdx !== -1) {
             handlers.splice(removeIdx, 1);
+            if (handlers.length === 0) {
+                this.methods.delete(methodName);
+            }
         }
     }