React根据当前日期获取一年前，一个月前，7天前的日子

const enum DayType {
  OneYear = 'ONE-YEAR',
  OneMonth = 'ONE-MONTH',
  SevenDay = 'SEVEN-DAY'
}
getSearchParams = () => {
    const { currentType } = this.state;
    const today = new Date();
    let startTime;
    if (currentType === DayType.OneYear) {
      //一年前
      const yearDate = new Date(today);
      yearDate.setFullYear(yearDate.getFullYear() - 1);
      startTime = dateFormat('YYYY-mm-dd HH:MM:SS', yearDate);
    } else if (currentType === DayType.OneMonth) {
      //一月前
      const monthDate = new Date(today);
      monthDate.setMonth(monthDate.getMonth() - 1);
      startTime = dateFormat('YYYY-mm-dd HH:MM:SS', monthDate);
    } else if (currentType === DayType.SevenDay) {
      //7天前
      const dayDate = new Date(today);
      dayDate.setDate(dayDate.getDate() - 7);
      startTime = dateFormat('YYYY-mm-dd HH:MM:SS', dayDate);
    }
    return {
      startTime,
      endTime: dateFormat('YYYY-mm-dd HH:MM:SS', today)
    };
  };

不好意思，又来更新了，简化后的代码

const enum DayType {
  OneYear = 'ONE-YEAR',
  OneMonth = 'ONE-MONTH',
  SevenDay = 'SEVEN-DAY'
}
getSearchParams = () => {
    const { currentType } = this.state;
    const format = 'YYYY-mm-dd';
    //开始时间
    const startDate = new Date();
    if (currentType === DayType.OneYear) {
      startDate.setFullYear(startDate.getFullYear() - 1);
    } else if (currentType === DayType.OneMonth) {
      startDate.setMonth(startDate.getMonth() - 1);
    } else if (currentType === DayType.SevenDay) {
      startDate.setDate(startDate.getDate() - 7);
    }
    const startTime = dateFormat(format, startDate);
    //结束时间
    const endDate = new Date();
    endDate.setDate(endDate.getDate() + 1);
    const endTime = dateFormat(format, endDate);
    return {
      startTime,
      endTime
    };
  };