From 34a75ed25b3c34f1a89e6ce40eb9d261075da632 Mon Sep 17 00:00:00 2001
From: Chris Feijoo <kube@users.noreply.github.com>
Date: Tue, 18 Jul 2017 18:43:36 +0200
Subject: [PATCH] Update type definition of Object.keys to

Solves need to explicitly specify type of `key` when in **Strict Mode**.

## Issue it solves

```ts
const someObj = {
  a: 42,
  b: 'Hello'
}

Object.keys(someObj)
  .forEach(key =>
    someObj[key] // ERROR: Element implicitly has an 'any' type because type ... has no index signature.
  )
```
---
 lib/lib.es5.d.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/lib.es5.d.ts b/lib/lib.es5.d.ts
index f359e519ab13e..431b69fc54aee 100644
--- a/lib/lib.es5.d.ts
+++ b/lib/lib.es5.d.ts
@@ -236,7 +236,7 @@ interface ObjectConstructor {
       * Returns the names of the enumerable properties and methods of an object.
       * @param o Object that contains the properties and methods. This can be an object that you created or an existing Document Object Model (DOM) object.
       */
-    keys(o: any): string[];
+    keys<A>(o: A): (keyof A)[];
 }
 
 /**