From 4d1a953ea93061865064a37bc0c6ff55304f2c5e Mon Sep 17 00:00:00 2001
From: Justin Beckwith <justin.beckwith@gmail.com>
Date: Mon, 7 May 2018 10:42:21 -0700
Subject: [PATCH] fix: add `defined` method on `is` npm module (#25467)

---
 types/is/index.d.ts  | 15 +++++++++++++++
 types/is/is-tests.ts |  6 ++++++
 2 files changed, 21 insertions(+)

diff --git a/types/is/index.d.ts b/types/is/index.d.ts
index 3b70472d65..37b485e0a0 100644
--- a/types/is/index.d.ts
+++ b/types/is/index.d.ts
@@ -87,6 +87,11 @@ interface IsStatic {
      */
     undefined(value: any): boolean;
 
+    /**
+     * Checks if the given value type is defined.
+     */
+    defined(value: any): boolean;
+
     /**
      * Checks if the given value types are same type.
      */
@@ -748,6 +753,16 @@ interface IsStaticApi {
      */
     undefined(value: any[]): boolean;
 
+    /**
+     * Checks if the given value type is defined.
+     */
+    defined(...value: any[]): boolean;
+
+    /**
+     * Checks if the given value type is defined.
+     */
+    defined(value: any[]): boolean;
+
     //#endregion
 
     //#region Presence checks
diff --git a/types/is/is-tests.ts b/types/is/is-tests.ts
index 0084de8990..77a88a81b3 100644
--- a/types/is/is-tests.ts
+++ b/types/is/is-tests.ts
@@ -104,6 +104,12 @@ is.all.undefined(undefined, 1);
 is.any.undefined(undefined, 2);
 is.all.undefined([{}, undefined]);
 
+is.defined(undefined);
+is.not.defined(null);
+is.all.defined(undefined, 1);
+is.any.defined(undefined, 2);
+is.all.defined([{}, undefined]);
+
 is.sameType(42, 7);
 is.sameType(42, '7');
 is.not.sameType(42, 7);