JS 格式化时间（获取两个日期之间的每一天、每一月、每半小时、每一秒）

时间戳转换为时间

// 时间戳转换为时间

function timestampToTime(timestamp, isMs = true) {

    const date = new Date(timestamp * (isMs ? 1 : 1000))

    return `${date.getFullYear()}-${date.getMonth() + 1 < 10 ? '0' + (date.getMonth() + 1) : date.getMonth() + 1}-${date.getDate()} ${date.getHours()}:${date.getMinutes()}:${date.getSeconds()}`

}

获取当天过去每半小时的时间

function formatTodayHalfHours(nowDate = +new Date()) {

    var timeStamp = new Date(new Date().setHours(0, 0, 0, 0));

    var dateList = []; 

    while (nowDate > timeStamp) {

        var hour = new Date(nowDate).getHours() < 10 ? '0' + new Date(nowDate).getHours() : new Date(nowDate).getHours();

        var minute = new Date(nowDate).getMinutes() < 31 ? '00' : '30';

        dateList.unshift(hour + ':' + minute + ':' + '00');

        nowDate -= 30 * 60 * 1000

    }

    return dateList

}

例如，当天0点 - 12点20分之间没半个小时的时间：

formatTodayHalfHours(+new Date('2019-04-28 12:20:00'))

输出：

["00:00:00", "00:30:00", "01:00:00", "01:30:00", "02:00:00", "02:30:00", "03:00:00", "03:30:00", "04:00:00", "04:30:00", "05:00:00", "05:30:00", "06:00:00", "06:30:00", "07:00:00", "07:30:00", "08:00:00", "08:30:00", "09:00:00", "09:30:00", "10:00:00", "10:30:00", "11:00:00", "11:30:00", "12:00:00"]

获取两个日期之间的每一天

function formatEveryDay(start, end) {

    let dateList = [];

    var startTime = getDate(start);

    var endTime = getDate(end);

    while ((endTime.getTime() - startTime.getTime()) >= 0) {

        var year = startTime.getFullYear();

        var month = startTime.getMonth() + 1 < 10 ? '0' + (startTime.getMonth() + 1) : startTime.getMonth() + 1;

        var day = startTime.getDate().toString().length == 1 ? "0" + startTime.getDate() : startTime.getDate();

        dateList.push(year + "-" + month + "-" + day);

        startTime.setDate(startTime.getDate() + 1);

    }

    return dateList;

}

function getDate(datestr) {

    var temp = datestr.split("-");

    var date = new Date(temp[0], temp[1] - 1, temp[2]);

    return date;

}

例如：

formatEveryDay('2019-03-05','2019-03-16');

输出：

["2019-03-05", "2019-03-06", "2019-03-07", "2019-03-08", "2019-03-09", "2019-03-10", "2019-03-11", "2019-03-12", "2019-03-13", "2019-03-14", "2019-03-15", "2019-03-16"]

获取两个日期之间的所有月份

// 格式化时间，获取两个日期之间所有月份

function getMonthBetween(start, end) { //传入的格式YYYY-MM

    let dateList = []; // 时间格式 ‘2019-04-01’

    let dateList2 = []; // 时间格式 ‘2019-04’

    var s = start.split("-");

    var e = end.split("-");

    var min = new Date();

    var max = new Date();

    min.setFullYear(s[0], s[1] * 1 - 1, 1); // 开始日期

    max.setFullYear(e[0], e[1] * 1 - 1, 1); // 结束日期

    var current = min;

    while (current <= max) {

        var year = current.getFullYear();

        var month = current.getMonth() + 1 < 10 ? '0' + (current.getMonth() + 1) : current.getMonth() + 1;

        dateList.push(year + "-" + month + "-" + '01');

        dateList2.push(year + "-" + month);

        current.setMonth(month);

    }

    return [dateList, dateList2];

}

例如：

getMonthBetween('2018-12-05','2019-03-16');

输出：

[["2018-12-01","2019-01-01","2019-02-01","2019-03-01"], ["2018-12","2019-01","2019-02","2019-03"]]

获取最近n秒的时间

function formatDateToArray(steps = 40) {

    var nowDate = +new Date() - 10000;

    var xAxisDate = [],

        postDate = [];

    for (var i = 0; i < steps; i++) {

        var year = new Date(nowDate).getFullYear();

        var month = new Date(nowDate).getMonth() + 1 < 10 ? '0' + (new Date(nowDate).getMonth() + 1) : new Date(nowDate).getMonth() + 1;

        var day = new Date(nowDate).getDate() < 10 ? '0' + new Date(nowDate).getDate() : new Date(nowDate).getDate();

        var hour = new Date(nowDate).getHours() < 10 ? '0' + new Date(nowDate).getHours() : new Date(nowDate).getHours();

        var minute = new Date(nowDate).getMinutes() < 10 ? '0' + new Date(nowDate).getMinutes() : new Date(nowDate).getMinutes();

        var second = new Date(nowDate).getSeconds() < 10 ? '0' + new Date(nowDate).getSeconds() : new Date(nowDate).getSeconds();

        xAxisDate.unshift(hour + ':' + minute + ':' + second);

        postDate.unshift(year + '-' + month + '-' + day + ' ' + hour + ':' + minute + ':' + second);

        nowDate = nowDate - 1000;

    }

    return [xAxisDate, postDate];

}

例如：获取最近10秒：

formatDateToArray(10);

获取最近 n 天

function getRecentDays(num) {

    var today = new Date();

    var steps = today.getTime() + 1000 * 60 * 60 * 24 * num;

    today.setTime(steps);

    var yy = today.getFullYear();

    var mm = today.getMonth();

    var dd = today.getDate();

    mm = bindMonth(mm + 1);

    dd = doHandleMonth(dd);

    return yy + "-" + mm + "-" + dd;

}

function bindMonth(month) {

    var m = month;

    if (month.toString().length == 1) {

        m = "0" + month;

    }

    return m;

}

function doHandleMonth(month) {

    var m = month;

    if (month.toString().length == 1) {

        m = "0" + month;

    }

    return m;

}

例如，9天前:

getRecentDays(-9);

获取两个日期之间的天数

function getDateDiff(startDate, endDate) {

    var startTime = new Date(Date.parse(startDate.replace(/-/g,   "/"))).getTime();

    var endTime = new Date(Date.parse(endDate.replace(/-/g,   "/"))).getTime();

    var dates = Math.abs((startTime - endTime)) / (1000 * 60 * 60 * 24);

    return  dates;

}

例如：

getDateDiff('2019-05-30','2019-05-20')

输出：