如何獲得某些特定格式的時間？

Question

我應該如何獲得時間與一些特定的格式，如我想獲得時間......上午/下午，然後添加一些分鐘。 例如我有日期2016-09-16T11:40:50.000Z從它第一次得到的時間11:40 am，然後加入20分鐘，得到類似結果12:00 am 所以，我該怎麼做這個任務。 我嘗試date.getTime（）但它不給我適當的時間，我想要的。

Answer 1

function gettime(date) { 
var hours = date.getHours(); 
var minutes = date.getMinutes(); 
var ampm = hours >= 12 ? 'pm' : 'am'; 
hours = hours % 12; 
hours = hours ? hours : 12; // the hour '0' should be '12' 
minutes = minutes < 10 ? '0'+minutes : minutes; 
return = hours + ':' + minutes + ' ' + ampm; 

}

Answer 2

如果你在談論Date.prototype.getTime()功能再有就是使用此功能，因爲它總是返回整數意味着秒鐘沒有直接的方法，以一個格式化字符串。

Answer 3

for adding more minutes you can use 
    date.getMinutes() + 20; //It will add 20 minutes 

Answer 4

function formatDate(date, format, utc) { 
    var MMMM = ["\x00", "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"]; 
    var MMM = ["\x01", "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]; 
    var dddd = ["\x02", "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"]; 
    var ddd = ["\x03", "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"]; 

    function ii(i, len) { 
     var s = i + ""; 
     len = len || 2; 
     while (s.length < len) s = "0" + s; 
     return s; 
    } 

    var y = utc ? date.getUTCFullYear() : date.getFullYear(); 
    format = format.replace(/(^|[^\\])yyyy+/g, "$1" + y); 
    format = format.replace(/(^|[^\\])yy/g, "$1" + y.toString().substr(2, 2)); 
    format = format.replace(/(^|[^\\])y/g, "$1" + y); 

    var M = (utc ? date.getUTCMonth() : date.getMonth()) + 1; 
    format = format.replace(/(^|[^\\])MMMM+/g, "$1" + MMMM[0]); 
    format = format.replace(/(^|[^\\])MMM/g, "$1" + MMM[0]); 
    format = format.replace(/(^|[^\\])MM/g, "$1" + ii(M)); 
    format = format.replace(/(^|[^\\])M/g, "$1" + M); 

    var d = utc ? date.getUTCDate() : date.getDate(); 
    format = format.replace(/(^|[^\\])dddd+/g, "$1" + dddd[0]); 
    format = format.replace(/(^|[^\\])ddd/g, "$1" + ddd[0]); 
    format = format.replace(/(^|[^\\])dd/g, "$1" + ii(d)); 
    format = format.replace(/(^|[^\\])d/g, "$1" + d); 

    var H = utc ? date.getUTCHours() : date.getHours(); 
    format = format.replace(/(^|[^\\])HH+/g, "$1" + ii(H)); 
    format = format.replace(/(^|[^\\])H/g, "$1" + H); 

    var h = H > 12 ? H - 12 : H == 0 ? 12 : H; 
    format = format.replace(/(^|[^\\])hh+/g, "$1" + ii(h)); 
    format = format.replace(/(^|[^\\])h/g, "$1" + h); 

    var m = utc ? date.getUTCMinutes() : date.getMinutes(); 
    format = format.replace(/(^|[^\\])mm+/g, "$1" + ii(m)); 
    format = format.replace(/(^|[^\\])m/g, "$1" + m); 

    var s = utc ? date.getUTCSeconds() : date.getSeconds(); 
    format = format.replace(/(^|[^\\])ss+/g, "$1" + ii(s)); 
    format = format.replace(/(^|[^\\])s/g, "$1" + s); 

    var f = utc ? date.getUTCMilliseconds() : date.getMilliseconds(); 
    format = format.replace(/(^|[^\\])fff+/g, "$1" + ii(f, 3)); 
    f = Math.round(f/10); 
    format = format.replace(/(^|[^\\])ff/g, "$1" + ii(f)); 
    f = Math.round(f/10); 
    format = format.replace(/(^|[^\\])f/g, "$1" + f); 

    var T = H < 12 ? "AM" : "PM"; 
    format = format.replace(/(^|[^\\])TT+/g, "$1" + T); 
    format = format.replace(/(^|[^\\])T/g, "$1" + T.charAt(0)); 

    var t = T.toLowerCase(); 
    format = format.replace(/(^|[^\\])tt+/g, "$1" + t); 
    format = format.replace(/(^|[^\\])t/g, "$1" + t.charAt(0)); 

    var tz = -date.getTimezoneOffset(); 
    var K = utc || !tz ? "Z" : tz > 0 ? "+" : "-"; 
    if (!utc) { 
     tz = Math.abs(tz); 
     var tzHrs = Math.floor(tz/60); 
     var tzMin = tz % 60; 
     K += ii(tzHrs) + ":" + ii(tzMin); 
    } 
    format = format.replace(/(^|[^\\])K/g, "$1" + K); 

    var day = (utc ? date.getUTCDay() : date.getDay()) + 1; 
    format = format.replace(new RegExp(dddd[0], "g"), dddd[day]); 
    format = format.replace(new RegExp(ddd[0], "g"), ddd[day]); 

    format = format.replace(new RegExp(MMMM[0], "g"), MMMM[M]); 
    format = format.replace(new RegExp(MMM[0], "g"), MMM[M]); 

    format = format.replace(/\\(.)/g, "$1"); 

    return format; 
};