fix: make static element property available (#11079)

for the SvelteComponent type
closes #8936

Author: dummdidumm

.changeset/eight-hornets-punch.md

@@ -0,0 +1,5 @@
+---
+"svelte": patch
+---
+
+fix: make static `element` property available for the SvelteComponent type

packages/svelte/src/index.d.ts

@@ -59,6 +59,9 @@ export class SvelteComponent<
 	Events extends Record<string, any> = any,
 	Slots extends Record<string, any> = any
 > {
+	/** The custom element version of the component. Only present if compiled with the `customElement` compiler option */
+	static element?: typeof HTMLElement;
+
 	[prop: string]: any;
 	/**
 	 * @deprecated This constructor only exists when using the `asClassComponent` compatibility helper, which

packages/svelte/tests/types/component.ts

@@ -8,6 +8,8 @@ import {
 	hydrate
 } from 'svelte';
 
+SvelteComponent.element === HTMLElement;
+
 // --------------------------------------------------------------------------- legacy: classes
 
 class LegacyComponent extends SvelteComponent<

packages/svelte/types/index.d.ts

@@ -60,6 +60,9 @@ declare module 'svelte' {
 		Events extends Record<string, any> = any,
 		Slots extends Record<string, any> = any
 	> {
+		/** The custom element version of the component. Only present if compiled with the `customElement` compiler option */
+		static element?: typeof HTMLElement;
+
 		[prop: string]: any;
 		/**
 		 * @deprecated This constructor only exists when using the `asClassComponent` compatibility helper, which