【小知识】你要的时间

function timestampToTime(timestamp) {
    var date = new Date(timestamp);//时间戳为10位需*1000，时间戳为13位的话不需乘1000
    var Y = date.getFullYear() + '年';
    var M = (date.getMonth() + 1 < 10 ? '0' + (date.getMonth() + 1) : date.getMonth() + 1) + '月';
    var D = (date.getDate() < 10 ? '0' + date.getDate() : date.getDate()) + '日 ';
    var h = (date.getHours() < 10 ? '0' + date.getHours() : date.getHours()) + ':';
    var m = (date.getMinutes() < 10 ? '0' + date.getMinutes() : date.getMinutes()) + ':';
    var s = (date.getSeconds() < 10 ? '0' + date.getSeconds() : date.getSeconds());
    return Y + M + D + h + m + s;
}

function timeago(timestamp) {
    var minute = 1000 * 60;      //把分，时，天，周，半个月，一个月用毫秒表示
    var hour = minute * 60;
    var day = hour * 24;
    var week = day * 7;
    var halfamonth = day * 15;
    var month = day * 30;
    var now = new Date().getTime();   //获取当前时间毫秒
    console.log(now)
    var diffValue = now - timestamp;//时间差

    if (diffValue < 0) {
        return;
    }
    var minC = diffValue / minute;  //计算时间差的分，时，天，周，月
    var hourC = diffValue / hour;
    var dayC = diffValue / day;
    var weekC = diffValue / week;
    var monthC = diffValue / month;
    console.log(monthC, weekC, dayC, hourC, minC)
    var result = ''
    // 不要几月前几周前，可以把这几个条件去掉
    if (monthC >= 1 && monthC <= 2) {
        result = " " + parseInt(monthC) + "月前"
    } else if (weekC >= 1 && weekC <= 3) {
        result = " " + parseInt(weekC) + "周前"
    } else if (dayC >= 1 && dayC <= 6) {
        result = " " + parseInt(dayC) + "天前"
    } else if (hourC >= 1 && hourC <= 23) {
        result = " " + parseInt(hourC) + "小时前"
    } else if (minC >= 1 && minC <= 59) {
        result = " " + parseInt(minC) + "分钟前"
    } else if (diffValue >= 0 && diffValue <= minute) {
        result = "刚刚"
    } else {
        var datetime = new Date();
        datetime.setTime(timestamp);
        var Nyear = datetime.getFullYear();
        var Nmonth = datetime.getMonth() + 1 < 10 ? "0" + (datetime.getMonth() + 1) : datetime.getMonth() + 1;
        var Ndate = datetime.getDate() < 10 ? "0" + datetime.getDate() : datetime.getDate();
        var Nhour = datetime.getHours() < 10 ? "0" + datetime.getHours() : datetime.getHours();
        var Nminute = datetime.getMinutes() < 10 ? "0" + datetime.getMinutes() : datetime.getMinutes();
        var Nsecond = datetime.getSeconds() < 10 ? "0" + datetime.getSeconds() : datetime.getSeconds();
        result = Nyear + "-" + Nmonth + "-" + Ndate
    }
    return result;
}