Method _adjustDate

codebase/sources/dhtmlxscheduler.es.js:9025–9036

(direction)

    this.onStateChangeHandlers.forEach((handler) => handler(oldState, newState));
  }
  _adjustDate(direction) {
    const { mode, date } = this.getState();
    const newDate = new Date(date);
    if (mode === "days") {
      newDate.setMonth(date.getMonth() + direction);
    } else if (mode === "months") {
      newDate.setFullYear(date.getFullYear() + direction);
    } else {
      newDate.setFullYear(date.getFullYear() + direction * 10);
    }
    this.setState({ date: newDate });
  }
  _toggleMode() {
    const newIndex = (this.state.currentModeIndex + 1) % this.state.modes.length;
    this.setState({ currentModeIndex: newIndex });