From 59b32e53531ac19bee174b8b019ea96e34be4f31 Mon Sep 17 00:00:00 2001
From: Leonard Thieu <leonard-thieu@users.noreply.github.com>
Date: Mon, 22 Oct 2018 12:25:28 -0400
Subject: [PATCH] [jquery] Add self-extending overloads of `jQuery.extend()`.
 (#29924)

---
 types/jquery/JQueryStatic.d.ts | 16 ++++++++++++++++
 types/jquery/jquery-tests.ts   |  6 ++++++
 2 files changed, 22 insertions(+)

diff --git a/types/jquery/JQueryStatic.d.ts b/types/jquery/JQueryStatic.d.ts
index 8e753d1739..64cbe6f47b 100644
--- a/types/jquery/JQueryStatic.d.ts
+++ b/types/jquery/JQueryStatic.d.ts
@@ -940,6 +940,14 @@ $( "#log" ).append( JSON.stringify( object1 ) );
 ```
      */
     extend<T, U>(deep: true, target: T, object1: U): T & U;
+    /**
+     * Merge the contents of two or more objects together into the first object.
+     * @param deep If true, the merge becomes recursive (aka. deep copy). Passing false for this argument is not supported.
+     * @param target The object to extend. It will receive the new properties.
+     * @see \`{@link https://api.jquery.com/jQuery.extend/ }\`
+     * @since 1.1.4
+     */
+    extend<T>(deep: true, target: T): this & T;
     /**
      * Merge the contents of two or more objects together into the first object.
      * @param deep If true, the merge becomes recursive (aka. deep copy). Passing false for this argument is not supported.
@@ -1431,6 +1439,14 @@ $( "#log" ).append( "<div><b>settings -- </b>" + JSON.stringify( settings ) + "<
 ```
      */
     extend<T, U>(target: T, object1: U): T & U;
+    /**
+     * Merge the contents of two or more objects together into the first object.
+     * @param target An object that will receive the new properties if additional objects are passed in or that will
+     *               extend the jQuery namespace if it is the sole argument.
+     * @see \`{@link https://api.jquery.com/jQuery.extend/ }\`
+     * @since 1.0
+     */
+    extend<T>(target: T): this & T;
     /**
      * Merge the contents of two or more objects together into the first object.
      * @param target An object that will receive the new properties if additional objects are passed in or that will
diff --git a/types/jquery/jquery-tests.ts b/types/jquery/jquery-tests.ts
index 548c20c10b..befd31e7e7 100644
--- a/types/jquery/jquery-tests.ts
+++ b/types/jquery/jquery-tests.ts
@@ -463,6 +463,9 @@ function JQueryStatic() {
         // $ExpectType { name: string; } & EventTarget
         $.extend(true, t, u);
 
+        // $ExpectType JQueryStatic & { name: string; }
+        $.extend(true, t);
+
         // $ExpectType any
         $.extend(true, t, u, v, w, x, y, z, a);
 
@@ -484,6 +487,9 @@ function JQueryStatic() {
         // $ExpectType { name: string; } & EventTarget
         $.extend(t, u);
 
+        // $ExpectType JQueryStatic & { name: string; }
+        $.extend(t);
+
         // $ExpectType any
         $.extend(t, u, v, w, x, y, z, a);
     }