Method _notifyStateChange

codebase/sources/dhtmlxscheduler.es.js:9022–9024

(oldState, newState)

    };
  }
  _notifyStateChange(oldState, newState) {
    this.onStateChangeHandlers.forEach((handler) => handler(oldState, newState));
  }
  _adjustDate(direction) {
    const { mode, date } = this.getState();
    const newDate = new Date(date);