@bemit/consent-ui/EventAware/EventAware.js

export class EventAware {
  handlers = {};
  state = {
    events: 0
  };
  call(scope, ...data) {
    const handlers = Object.values(this.handlers[scope]);
    handlers.forEach(handler => handler(...data));
  }
  getEvtId() {
    return String(this.state.events = this.state.events + 1);
  }
  on(scope, cb) {
    const evtId = this.getEvtId();
    if (!this.handlers[scope]) {
      this.handlers[scope] = {};
    }
    this.handlers[scope][evtId] = cb;
    return evtId;
  }
  off(scope, evtId) {
    if (typeof this.handlers[scope] === 'object' && typeof this.handlers[scope]?.[evtId] === 'object') {
      delete this.handlers[scope][evtId];
    }
  }
}