capricorn86#1092@patch: Simplifies WheelEvent.

https://w3c.github.io/uievents/#interface-wheelevent.
tkrotoff · Sep 24, 2023 · 18155b0 · 18155b0
1 parent fc25486
commit 18155b0
Showing 1 changed file with 9 additions and 11 deletions.
diff --git a/packages/happy-dom/src/event/events/WheelEvent.ts b/packages/happy-dom/src/event/events/WheelEvent.ts
@@ -8,25 +8,23 @@ export default class WheelEvent extends UIEvent {
 	public static DOM_DELTA_PIXEL = 0;
 	public static DOM_DELTA_LINE = 1;
 	public static DOM_DELTA_PAGE = 2;
-	public readonly deltaX: number = 0;
-	public readonly deltaY: number = 0;
-	public readonly deltaZ: number = 0;
-	public readonly deltaMode: number = 0;
+	public readonly deltaX: number;
+	public readonly deltaY: number;
+	public readonly deltaZ: number;
+	public readonly deltaMode: number;
 
 	/**
 	 * Constructor.
 	 *
 	 * @param type Event type.
 	 * @param [eventInit] Event init.
 	 */
-	constructor(type: string, eventInit: IWheelEventInit = null) {
+	constructor(type: string, eventInit: IWheelEventInit = {}) {
 		super(type, eventInit);
 
-		if (eventInit) {
-			this.deltaX = eventInit.deltaX !== undefined ? eventInit.deltaX : 0;
-			this.deltaY = eventInit.deltaY !== undefined ? eventInit.deltaY : 0;
-			this.deltaZ = eventInit.deltaZ !== undefined ? eventInit.deltaZ : 0;
-			this.deltaMode = eventInit.deltaMode !== undefined ? eventInit.deltaMode : 0;
-		}
+		this.deltaX = eventInit.deltaX ?? 0;
+		this.deltaY = eventInit.deltaY ?? 0;
+		this.deltaZ = eventInit.deltaZ ?? 0;
+		this.deltaMode = eventInit.deltaMode ?? 0;
 	}
 }