sample:
// Create an Emitter instance
const emitter = new Emitter();
// Define event handler
function handleEvent(arg) {
console.log('Event handled:', arg);
}
// Add event listener
emitter.on('exampleEvent', handleEvent);
// Emit event
emitter.emit('exampleEvent', 'Hello, World!');
// Remove event listener
emitter.off('exampleEvent', handleEvent);