packages/happy-dom/src/nodes/element/Element.ts

@@ -44,6 +44,7 @@ export default class Element extends Node implements IElement {
 	public shadowRoot: IShadowRoot = null;
 	public prefix: string = null;
 
+	public scrollHeight = 0;
 	public scrollTop = 0;
 	public scrollLeft = 0;
 	public children: IHTMLCollection<IElement> = new HTMLCollection<IElement>();
@@ -369,6 +370,7 @@ export default class Element extends Node implements IElement {
 		(<string>clone.tagName) = this.tagName;
 		clone.scrollLeft = this.scrollLeft;
 		clone.scrollTop = this.scrollTop;
+		clone.scrollHeight = this.scrollHeight;
 		(<string>clone.namespaceURI) = this.namespaceURI;
 
 		return <IElement>clone;

packages/happy-dom/src/nodes/element/IElement.ts

@@ -23,6 +23,7 @@ export default interface IElement extends IChildNode, INonDocumentTypeChildNode,
 	prefix: string | null;
 	scrollTop: number;
 	scrollLeft: number;
+	scrollHeight: number;
 	id: string;
 	className: string;
 	role: string;

packages/happy-dom/test/nodes/element/Element.test.ts

@@ -1512,6 +1512,12 @@ describe('Element', () => {
 		});
 	}
 
+	describe('scrollHeight', () => {
+		it('Returns the scroll height.', () => {
+			expect(element.scrollHeight).toBe(0);
+		});
+	});
+
 	describe('toString()', () => {
 		it('Returns the same as outerHTML.', () => {
 			expect(element.toString()).toBe(element.outerHTML);