#463@minor: Added partial support for XMLHttpRequest.

packages/happy-dom/src/exception/DOMExceptionNameEnum.ts

@@ -3,6 +3,8 @@ enum DOMExceptionNameEnum {
 	indexSizeError = 'IndexSizeError',
 	syntaxError = 'SyntaxError',
 	hierarchyRequestError = 'HierarchyRequestError',
-	invalidCharacterError = 'InvalidCharacterError'
+	invalidCharacterError = 'InvalidCharacterError',
+	securityError = 'SecurityError',
+	networkError = 'NetworkError'
 }
 export default DOMExceptionNameEnum;

packages/happy-dom/src/fetch/ResourceFetchHandler.ts

@@ -34,7 +34,14 @@ export default class ResourceFetchHandler {
 		// We want to only load SyncRequest when it is needed to improve performance and not have direct dependencies to server side packages.
 		const absoluteURL = RelativeURL.getAbsoluteURL(document.defaultView.location, url);
 		const syncRequest = require('sync-request');
-		const response = syncRequest('GET', absoluteURL);
+		const response = syncRequest('GET', absoluteURL, {
+			headers: {
+				'user-agent': document.defaultView.navigator.userAgent,
+				cookie: document.defaultView.document.cookie,
+				referer: document.defaultView.location.href,
+				pragma: 'no-cache'
+			}
+		});
 
 		if (response.isError()) {
 			throw new DOMException(

packages/happy-dom/src/location/RelativeURL.ts

@@ -11,16 +11,32 @@ export default class RelativeURL {
 	 * @param url URL.
 	 */
 	public static getAbsoluteURL(location: Location, url: string): string {
+		// If the URL starts with '//' then it is a Protocol relative URL.
+		// Reference: https://url.spec.whatwg.org/#protocol-relative-urls.
+		// E.g. '//example.com/' needs to be converted to 'http://example.com/'.
+		if (url.startsWith('//')) {
+			return location.protocol + url;
+		}
+		// If the URL starts with '/' then it is a Path relative URL.
+		// E.g. '/example.com/' needs to be converted to 'http://example.com/'.
 		if (url.startsWith('/')) {
 			return location.origin + url;
 		}
-
+		// If the URL starts with 'https://' or 'http://' then it is a Absolute URL.
+		// E.g. 'https://example.com' needs to be converted to 'https://example.com/'.
+		// E.g. 'http://example.com' needs to be converted to 'http://example.com/'.
 		if (!url.startsWith('https://') && !url.startsWith('http://')) {
 			let pathname = location.pathname;
 			if (pathname.endsWith('/')) {
 				pathname = pathname.slice(0, -1);
 			}
-			return location.origin + pathname + '/' + url;
+
+			return (
+				location.origin +
+				(/(.*)\/.*/.test(pathname) ? pathname.match(/(.*)\/.*/)[1] : '') +
+				'/' +
+				url
+			);
 		}
 
 		return url;

packages/happy-dom/src/window/Window.ts

@@ -93,6 +93,9 @@ import * as PerfHooks from 'perf_hooks';
 import VM from 'vm';
 import { Buffer } from 'buffer';
 import { atob, btoa } from './WindowBase64';
+import XMLHttpRequest from '../xml-http-request/XMLHttpRequest';
+import XMLHttpRequestUpload from '../xml-http-request/XMLHttpRequestUpload';
+import { XMLHttpRequestEventTarget } from '../xml-http-request/XMLHttpRequestEventTarget';
 
 /**
  * Browser window.
@@ -196,6 +199,11 @@ export default class Window extends EventTarget implements IWindow {
 	} = Response;
 	public readonly DOMRect: typeof DOMRect;
 
+	// XMLHttpRequest
+	public XMLHttpRequest = XMLHttpRequest;
+	public XMLHttpRequestUpload = XMLHttpRequestUpload;
+	public XMLHttpRequestEventTarget = XMLHttpRequestEventTarget;
+
 	// Events
 	public onload: (event: Event) => void = null;
 	public onerror: (event: ErrorEvent) => void = null;
@@ -305,6 +313,7 @@ export default class Window extends EventTarget implements IWindow {
 			this.dispatchEvent(new Event('load'));
 		});
 
+		XMLHttpRequest._defaultView = this;
 		DOMParser._ownerDocument = this.document;
 		FileReader._ownerDocument = this.document;
 		Image.ownerDocument = this.document;