Merge pull request #1065 from Schleuse/task/#1064-HTMLDialogElement-c…

…lose-emits-a-close-Event-even-when-the-dialog-is-already-closed

#1064@patch: Emit close event only when dialog was open.

packages/happy-dom/src/nodes/html-dialog-element/HTMLDialogElement.ts

@@ -30,9 +30,12 @@ export default class HTMLDialogElement extends HTMLElement implements IHTMLDialo
 	 * @param [returnValue] ReturnValue.
 	 */
 	public close(returnValue = ''): void {
+		const wasOpen = this.open;
 		this.removeAttribute('open');
 		this.returnValue = returnValue;
-		this.dispatchEvent(new Event('close'));
+		if (wasOpen) {
+			this.dispatchEvent(new Event('close'));
+		}
 	}
 
 	/**

packages/happy-dom/test/nodes/html-dialog-element/HTMLDialogElement.test.ts

@@ -92,6 +92,13 @@ describe('HTMLDialogElement', () => {
 			expect((<Event>(<unknown>dispatched)).bubbles).toBe(false);
 		});
 
+		it('Should only dispatch a close event when dialog wasnt already closed', () => {
+			let dispatched: Event | null = null;
+			element.addEventListener('close', (event: Event) => (dispatched = event));
+			element.close();
+			expect(dispatched).toBe(null);
+		});
+
 		it('Should dispatch a close event when closing a modal', () => {
 			let dispatched: Event | null = null;
 			element.addEventListener('close', (event: Event) => (dispatched = event));