API Reference > imodeljs-frontend > Tools > InteractiveTool > onMouseWheel onMouseWheel Method Invoked when the mouse wheel moves. onMouseWheel(_ev: BeWheelEvent): Promise<EventHandled> Parameter Type Description _ev BeWheelEvent Returns - Promise<EventHandled> Yes if event completely handled by tool and event should not be passed on to the IdleTool. Defined in core/frontend/src/tools/Tool.ts Line 549 Last Updated: 11 June, 2024