Method next

src/Datepicker/Datetime.js:231–245

(stage)

  }

  next (stage) {
    let d = this.state.current;
    switch (stage) {
      case 'year':
        d = this.changeDate({ year: d.getFullYear() + 18, day: 1 });
        break;
      case 'month':
        d = this.changeDate({ year: d.getFullYear() + 1, day: 1 });
        break;
      case 'day':
        d = this.changeDate({ month: d.getMonth() + 1, day: 1 });
        break;
    }
    this.stateChange({ current: d });
  }

  pre (stage) {
    let d = this.state.current;