[jquery] Change all HTMLElement to be Element (#29282)

* [jquery] Change all `HTMLElement` to be `Element`

* [jquery/v2] remove wrong `parseHTML` overload

types/jquery/v2/index.d.ts

@@ -824,7 +824,7 @@ interface JQueryStatic {
      * @see {@link https://api.jquery.com/jQuery.ajaxTransport/}
      */
     ajaxTransport(dataType: string, handler: (opts: any, originalOpts: JQueryAjaxSettings, jqXHR: JQueryXHR) => any): void;
-    
+
     ajaxSettings: JQueryAjaxSettings;
 
      /**
@@ -1403,16 +1403,6 @@ interface JQueryStatic {
      */
     unique<T extends Element>(array: T[]): T[];
 
-    /**
-     * Parses a string into an array of DOM nodes.
-     *
-     * @param data HTML string to be parsed
-     * @param context DOM element to serve as the context in which the HTML fragment will be created
-     * @param keepScripts A Boolean indicating whether to include scripts passed in the HTML string
-     * @see {@link https://api.jquery.com/jQuery.parseHTML/}
-     */
-    parseHTML(data: string, context?: HTMLElement, keepScripts?: boolean): any[];
-
     /**
      * Parses a string into an array of DOM nodes.
      *
@@ -3286,7 +3276,7 @@ interface JQuery {
      * @name toArray
      * @see {@link https://api.jquery.com/toArray/}
      */
-    toArray(): HTMLElement[];
+    toArray(): Element[];
 
     /**
      * Remove the parents of the set of matched elements from the DOM, leaving the matched elements in their place.
@@ -3353,13 +3343,13 @@ interface JQuery {
      * @param index A zero-based integer indicating which element to retrieve.
      * @see {@link https://api.jquery.com/get/#get-index}
      */
-    get(index: number): HTMLElement;
+    get(index: number): Element;
     /**
      * Retrieve the elements matched by the jQuery object.
      * @alias toArray
      * @see {@link https://api.jquery.com/get/#get}
      */
-    get(): HTMLElement[];
+    get(): Element[];
 
     /**
      * Search for a given element from among the matched elements.

types/jquery/v2/jquery-tests.ts

@@ -3554,3 +3554,11 @@ function test_promise_then_not_return_deferred() {
   promise = promise.fail();
   promise = promise.always();
 }
+
+function test_element() {
+    const itemEl = $('#item')[0];
+    $('li').toArray().indexOf(itemEl);
+    $('li').get().indexOf(itemEl);
+    let otherItemEl = $('li').get(0);
+    otherItemEl = itemEl;
+}