From 0514660017f931e31d84de41929a385a8330ecd5 Mon Sep 17 00:00:00 2001
From: Andrey Kurdyumov <kant2002@gmail.com>
Date: Wed, 23 Nov 2016 12:40:31 +0600
Subject: [PATCH 1/2] Add missing onError

See http://knockoutjs.com/documentation/asynchronous-error-handling.html for justification
---
 knockout/index.d.ts | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/knockout/index.d.ts b/knockout/index.d.ts
index 3db35f7578..a4ca8573ae 100644
--- a/knockout/index.d.ts
+++ b/knockout/index.d.ts
@@ -587,6 +587,12 @@ interface KnockoutStatic {
     /////////////////////////////////
 
     tasks: KnockoutTasks;
+    
+    /////////////////////////////////
+    // utils.js
+    /////////////////////////////////
+
+    onError: (error: Error) => any;
 }
 
 interface KnockoutBindingProvider {

From 19a466bce5b2b3419f355491fdf273f5c56bdb7b Mon Sep 17 00:00:00 2001
From: Andrey Kyrdyumov <kant2002@gmail.com>
Date: Thu, 24 Nov 2016 10:01:15 +0600
Subject: [PATCH 2/2] Make strickter onError signature and make it optional

---
 knockout/index.d.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/knockout/index.d.ts b/knockout/index.d.ts
index a4ca8573ae..970a4e9a08 100644
--- a/knockout/index.d.ts
+++ b/knockout/index.d.ts
@@ -592,7 +592,7 @@ interface KnockoutStatic {
     // utils.js
     /////////////////////////////////
 
-    onError: (error: Error) => any;
+    onError?: (error: Error) => void;
 }
 
 interface KnockoutBindingProvider {