nhn-cd-sdk/examples/js/event-emitter.js

NHN Cheating Detection SDK

export function createEventEmitter() {
  const events = {};
  return {
    on(name, listener) {
      events[name] = events[name] || [];
      events[name].push(listener);
    },
    off(name, listener) {
      if (!events[name]) {
        return;
      }
      const listenerList = events[name];
      const index = listenerList.indexOf(listener);
      if (index > -1) {
        listenerList.splice(index, 1);
      }
    },
    fire(name, ...data) {
      if (!events[name]) {
        return;
      }
      events[name].forEach((listener) => listener(...data));
    }
  };
}

let eventEmitter = createEventEmitter();
export function useEventEmitter() {
  return eventEmitter;
}