Function dispatchEvent

lib/input-handler.test.ts:125–130

(event: any)

      }
    },
    dispatchEvent(event: any) {
      const handlers = listeners.get(event.type) || [];
      for (const handler of handlers) {
        handler(event);
      }
    },
    // Mock childNodes and removeChild for text node cleanup test
    childNodes: [] as Node[],
    removeChild(node: Node) {