feat: [#1400] Adds support for document.elementFromPoint

Co-authored-by: David Ortner <david@ortner.se>

packages/happy-dom/src/nodes/document/Document.ts

@@ -1349,6 +1349,17 @@ export default class Document extends Node {
 		return processingInstruction;
 	}
 
+	/**
+	 * Get element at a given point.
+	 *
+	 * @param _x horizontal coordinate
+	 * @param _y vertical coordinate
+	 * @returns Always returns null since Happy DOM does not render elements.
+	 */
+	public elementFromPoint(_x: number, _y: number): Element | null {
+		return null;
+	}
+
 	/**
 	 * Imports a node.
 	 *

packages/happy-dom/test/nodes/document/Document.test.ts

@@ -1409,4 +1409,11 @@ describe('Document', () => {
 			expect(document.currentScript).toBe(null);
 		});
 	});
+
+	describe('elementFromPoint', () => {
+		it('Returns null.', () => {
+			const element = document.elementFromPoint(0, 0);
+			expect(element).toBe(null);
+		});
+	});
 });