Pomelo Lee workspace

/**
 * 按类型格式化日期
 * @param {*} date 具体日期变量
 * @param {string} dateType 需要返回类型,包括（'yyyy年mm月dd日'，'yyyy-mm-dd'， 'yyyy.mm.dd'，'yyyy-mm-dd MM:mm:ss'， 'mm-dd MM:mm:ss'， 'yyyy年mm月dd日 MM:mm:ss'）
 * @return {string} dateText 返回为指定格式的日期字符串
 */
function getFormatDate(date, dateType) {
    let dateObj = new Date(date);
    let month = dateObj.getMonth() + 1;
    let strDate = dateObj.getDate();
    let hours = dateObj.getHours();
    let minutes = dateObj.getMinutes();
    let seconds = dateObj.getSeconds();
    if (month >= 1 && month <= 9) {
        month = "0" + month;
    }
    if (strDate >= 0 && strDate <= 9) {
        strDate = "0" + strDate;
 
    }
    if (hours >= 0 && hours <= 9) {
        hours = "0" + hours
    }
    if (minutes >= 0 && minutes <= 9) {
        minutes = "0" + minutes
    }
    if (seconds >= 0 && seconds <= 9) {
        seconds = "0" + seconds
    }
 
    let dateText = dateObj.getFullYear() + '年' + (dateObj.getMonth() + 1) + '月' + dateObj.getDate() + '日';
    if (dateType == "yyyy-mm-dd") {
        dateText = dateObj.getFullYear() + '-' + (dateObj.getMonth() + 1) + '-' + dateObj.getDate();
    }
    if (dateType == "yyyy.mm.dd") {
        dateText = dateObj.getFullYear() + '.' + (dateObj.getMonth() + 1) + '.' + dateObj.getDate();
    }
    if (dateType == "yyyy-mm-dd MM:mm:ss") {
        dateText = dateObj.getFullYear() + '-' + month + '-' + strDate + ' ' + hours + ":" + minutes + ":" + seconds;
    }
    if (dateType == "mm-dd MM:mm:ss") {
        dateText = month + '-' + strDate + ' ' + hours + ":" + minutes + ":" + seconds;
    }
    if (dateType == "yyyy年mm月dd日 MM:mm:ss") {
        dateText = dateObj.getFullYear() + '年' + month + '月' + strDate + '日' + ' ' + hours + ":" + minutes + ":" + seconds;
    }
    return dateText;
}
 
/**
 * 设置几天后的日期
* @param  {string} date 起始日期
* @param  {number} day 向后的天数
* @return {string} 返回想要得到的日期
*/
function convertDate (date, day) {
    let tempDate = new Date(date);
    tempDate.setDate(tempDate.getDate()+day);
    let Y = tempDate.getFullYear();
    let M = tempDate.getMonth()+1 < 10 ? '0'+(tempDate.getMonth()+1) : tempDate.getMonth()+1;
    let D = tempDate.getDate() < 10 ? '0'+(tempDate.getDate()) : tempDate.getDate();
    let result = Y + "-" + M + "-" + D
    return result;
}
 
/**
 * 获取当前时间的n天后的时间戳
 * @param {number} n 天数
 * @returns {Number} 返回值为时间毫秒值
 */
function toNextTimes(n){
    let timestamp = +new Date() + n * 86400000;
    return timestamp;
}
 
/***
 * 本周第一天
 *  @return {*} WeekFirstDay 返回本周第一天的时间
 */
function showWeekFirstDay(){
    let Nowdate = new Date();
    let WeekFirstDay=new Date(Nowdate-(Nowdate.getDay()-1)*86400000);
    return WeekFirstDay;
}
 
/***
 * 本周最后一天
 *  @return {*} WeekLastDay 返回本周最后一天的时间
 */
function showWeekLastDay(){
    let nowDate = new Date();
    let weekFirstDay=new Date(nowDate-(nowDate.getDay()-1)*86400000);
    let WeekLastDay=new Date((weekFirstDay/1000+6*86400)*1000);
    return WeekLastDay;
}
 
/***
 * 本月第一天
 *  @return {*} MonthFirstDay 返回本月第一天的时间
 */
function showMonthFirstDay(){
    let Nowdate=new Date();
    let MonthFirstDay=new Date(Nowdate.getFullYear(),Nowdate.getMonth());
    return MonthFirstDay;
}
 
/***
 * 本月最后一天
 *  @return {*} MonthLastDay 返回本月最后一天的时间
 */
function showMonthLastDay(){
    let Nowdate=new Date();
    let MonthNextFirstDay=new Date(Nowdate.getFullYear(),Nowdate.getMonth()+1);
    let MonthLastDay=new Date(MonthNextFirstDay-86400000);
    return MonthLastDay;
}
 
/**
 * 日期转时间戳
 * @param {String} time - 日期字符串，如'2018-8-8','2018,8,8','2018/8/8'
 * @returns {Number} 返回值为时间毫秒值
 */
function timeToTimestamp (time) {
    let date = new Date(time);
    let timestamp = date.getTime();
    return timestamp;
}
 
/**
 * 返回指定时间戳之间的时间间隔
 *  @param {*} startTime 开始时间的时间戳
 *  @param {*} endTime 结束时间的时间戳
 *  @return {string} str 返回时间字符串 格式：yyyy年mm月dd日MM小时mm分钟ss秒前
 */
function getTimeInterval(startTime, endTime) {
    let runTime = parseInt((endTime - startTime) / 1000);
    let year = Math.floor(runTime / 86400 / 365);
    runTime = runTime % (86400 * 365);
    let month = Math.floor(runTime / 86400 / 30);
    runTime = runTime % (86400 * 30);
    let day = Math.floor(runTime / 86400);
    runTime = runTime % 86400;
    let hour = Math.floor(runTime / 3600);
    runTime = runTime % 3600;
    let minute = Math.floor(runTime / 60);
    runTime = runTime % 60;
    let second = runTime;
    let str = '';
    if (year > 0) {
        str = year + '年';
    }
    if (year <= 0 && month > 0) {
        str = month + '月';
    }
    if (year <= 0 && month <= 0 && day > 0) {
        str = day + '天';
    }
    if (year <= 0 && month <= 0 && day <= 0 && hour > 0) {
        str = hour + '小时';
    }
    if (year <= 0 && month <= 0 && day <= 0 && hour <= 0 && minute > 0) {
        str = minute + '分钟';
    }
    if (year <= 0 && month <= 0 && day <= 0 && hour <= 0 && minute <= 0 && second > 0) {
        str += second + '秒';
    }
    str += '前';
    return str;
}
 
/**
 * 星期转换，将数字转换成英文 0为sunday
 * @param num
 * @returns {null}
 */
function weekNumToStr(num) {
    let week = null;
    switch (num) {
        case 1 : {
            week = 'MONDAY';
            break;
        }
        case 2 : {
            week = "TUESDAY";
            break;
        }
        case 3 : {
            week = "WEDNESDAY";
            break;
        }
        case 4 : {
            week = "THURSDAY";
            break;
        }
        case 5 : {
            week = "FRIDAY";
            break;
        }
        case 6 : {
            week = "SATURDAY";
            break;
        }
        case 0 : {
            week = "SUNDAY";
            break;
        }
    }
    return week;
}
 
/**
 * 月份转换，将数字转换成英文 0为January
 * @param num
 * @returns {null}
 */
function monthNumToStr(num) {
    let month = null;
    switch (num) {
        case 0 : {
            month = 'JANUARY';
            break;
        }
        case 1 : {
            month = "FEBRUARY";
            break;
        }
        case 2 : {
            month = "MARCH";
            break;
        }
        case 3 : {
            month = "APRIL";
            break;
        }
        case 4 : {
            month = "MAY";
            break;
        }
        case 5 : {
            month = "JUNE";
            break;
        }
        case 6 : {
            month = "JULY";
            break;
        }
        case 7 : {
            month = "AUGUST";
            break;
        }
        case 8 : {
            month = "SEPTEMBER";
            break;
        }
        case 9 : {
            month = "OCTOBER";
            break;
        }
        case 10 : {
            month = "NOVEMBER";
            break;
        }
        case 11 : {
            month = "DECEMBER";
            break;
        }
 
    }
    return month;
}
 
/**
 * 判断是否为闰年
* @param  {number} year 要判断的年份
* @return {boolean} 返回布尔值
*/
export function leapYear(year) {
    return !(year % (year % 100 ? 4 : 400));
}
 
 
 
/** 
 * 返回两个年份之间的闰年
* @param  {number} start 开始年份
* @param  {number} end 结束年份
* @return {array}  arr 返回符合闰年的数组
*/
export function leapYears(start, end) {
    let arr = [];
    for (var i=start; i<end; i++) {
        if ( leapYear(i) ) {
            arr.push(i)
        }
    }
    return arr
}