Date.prototype.format = function (mask){var d = this;var zeroize = function (value, length){if (!length) length = 2;value = String(value);for (var i = 0, zeros = ''; i < (length - value.length); i++){zeros += '0';}return zeros + value;};return mask.replace(/"[^"]*"|'[^']*'|\b(?:d{1,4}|m{1,4}|yy(?:yy)?|([hHMstT])\1?|[lLZ])\b/g, function ($0){switch ($0){case 'd': return d.getDate();case 'dd': return zeroize(d.getDate());case 'ddd': return ['Sun', 'Mon', 'Tue', 'Wed', 'Thr', 'Fri', 'Sat'][d.getDay()];case 'dddd': return ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'][d.getDay()];case 'M': return d.getMonth() + 1;case 'MM': return zeroize(d.getMonth() + 1);case 'MMM': return ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'][d.getMonth()];case 'MMMM': return ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'][d.getMonth()];case 'yy': return String(d.getFullYear()).substr(2);case 'yyyy': return d.getFullYear();case 'h': return d.getHours() % 12 || 12;case 'hh': return zeroize(d.getHours() % 12 || 12);case 'H': return d.getHours();case 'HH': return zeroize(d.getHours());case 'm': return d.getMinutes();case 'mm': return zeroize(d.getMinutes());case 's': return d.getSeconds();case 'ss': return zeroize(d.getSeconds());case 'l': return zeroize(d.getMilliseconds(), 3);case 'L': var m = d.getMilliseconds();if (m > 99) m = Math.round(m / 10);return zeroize(m);case 'tt': return d.getHours() < 12 ? 'am' : 'pm';case 'TT': return d.getHours() < 12 ? 'AM' : 'PM';case 'Z': return d.toUTCString().match(/[A-Z]+$/);// Return quoted strings with the surrounding quotes removeddefault: return $0.substr(1, $0.length - 2);}});};
A complete js time processing function, although I did not carefully study the regular expressions in it, but I have passed the test and it is very useful, you can set the desired time format string output as needed. The format I applied is MM/dd/yyyy hh: mm TT and yyyy-MM-dd HH: mm: ss. I personally think this is very useful and comprehensive. Please add it to favorites if necessary.