date.format/date.format.js at master · johnsolo15/date.format · GitHub

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(function() {
	// Checking for locale month and day names
	if(typeof locale !== 'undefined'){
		Date.shortMonths = locale.shortMonths;
		Date.longMonths = locale.longMonths;
		Date.shortDays = locale.shortDays;
		Date.longDays = locale.longDays;
	}else{
		Date.shortMonths = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'];
		Date.longMonths = ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'];
		Date.shortDays = ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'];
		Date.longDays = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'];
	}

    // Defining patterns
    var replaceChars = {
        // Day
        d: function() { var d = this.getDate(); return (d < 10 ? '0' : '') + d; },
        D: function() { return Date.shortDays[this.getDay()]; },
        j: function() { return this.getDate(); },
        l: function() { return Date.longDays[this.getDay()]; },
        N: function() { var N = this.getDay(); return (N == 0 ? 7 : N); },
        S: function() { var S = this.getDate(); return (S % 10 == 1 && S != 11 ? 'st' : (S % 10 == 2 && S != 12 ? 'nd' : (S % 10 == 3 && S != 13 ? 'rd' : 'th'))); },
        w: function() { return this.getDay(); },
        z: function() { var d = new Date(this.getFullYear(),0,1); return Math.ceil((this - d) / 86400000); },
        // Week
        W: function() {
            var target = new Date(this.valueOf());
            var dayNr = (this.getDay() + 6) % 7;
            target.setDate(target.getDate() - dayNr + 3);
            var firstThursday = target.valueOf();
            target.setMonth(0, 1);
            if (target.getDay() !== 4) {
                target.setMonth(0, 1 + ((4 - target.getDay()) + 7) % 7);
            }
            var retVal = 1 + Math.ceil((firstThursday - target) / 604800000);

            return (retVal < 10 ? '0' + retVal : retVal);
        },
        // Month
        F: function() { return Date.longMonths[this.getMonth()]; },
        m: function() { var m = this.getMonth(); return (m < 9 ? '0' : '') + (m + 1); },
        M: function() { return Date.shortMonths[this.getMonth()]; },
        n: function() { return this.getMonth() + 1; },
        t: function() {
            var year = this.getFullYear(), nextMonth = this.getMonth() + 1;
            if (nextMonth === 12) {
                year = year++;
                nextMonth = 0;
            }
            return new Date(year, nextMonth, 0).getDate();
        },
        // Year
        L: function() { var L = this.getFullYear(); return (L % 400 == 0 || (L % 100 != 0 && L % 4 == 0)); },
        o: function() { var d  = new Date(this.valueOf());  d.setDate(d.getDate() - ((this.getDay() + 6) % 7) + 3); return d.getFullYear();},
        Y: function() { return this.getFullYear(); },
        y: function() { return ('' + this.getFullYear()).substr(2); },
        // Time
        a: function() { return this.getHours() < 12 ? 'am' : 'pm'; },
        A: function() { return this.getHours() < 12 ? 'AM' : 'PM'; },
        B: function() { return Math.floor((((this.getUTCHours() + 1) % 24) + this.getUTCMinutes() / 60 + this.getUTCSeconds() / 3600) * 1000 / 24); },
        g: function() { return this.getHours() % 12 || 12; },
        G: function() { return this.getHours(); },
        h: function() { var h = this.getHours(); return ((h % 12 || 12) < 10 ? '0' : '') + (h % 12 || 12); },
        H: function() { var H = this.getHours(); return (H < 10 ? '0' : '') + H; },
        i: function() { var i = this.getMinutes(); return (i < 10 ? '0' : '') + i; },
        s: function() { var s = this.getSeconds(); return (s < 10 ? '0' : '') + s; },
        v: function() { var v = this.getMilliseconds(); return (v < 10 ? '00' : (v < 100 ? '0' : '')) + v; },
        // Timezone
        e: function() { return Intl.DateTimeFormat().resolvedOptions().timeZone; },
        I: function() {
            var DST = null;
                for (var i = 0; i < 12; ++i) {
                        var d = new Date(this.getFullYear(), i, 1);
                        var offset = d.getTimezoneOffset();

                        if (DST === null) DST = offset;
                        else if (offset < DST) { DST = offset; break; }                     else if (offset > DST) break;
                }
                return (this.getTimezoneOffset() == DST) | 0;
            },
        O: function() { var O = this.getTimezoneOffset(); return (-O < 0 ? '-' : '+') + (Math.abs(O / 60) < 10 ? '0' : '') + Math.floor(Math.abs(O / 60)) + (Math.abs(O % 60) == 0 ? '00' : ((Math.abs(O % 60) < 10 ? '0' : '')) + (Math.abs(O % 60))); },
        P: function() { var P = this.getTimezoneOffset(); return (-P < 0 ? '-' : '+') + (Math.abs(P / 60) < 10 ? '0' : '') + Math.floor(Math.abs(P / 60)) + ':' + (Math.abs(P % 60) == 0 ? '00' : ((Math.abs(P % 60) < 10 ? '0' : '')) + (Math.abs(P % 60))); },
		T: function() { var tz = this.toLocaleTimeString(navigator.language,{timeZoneName:'short'}).split(' '); return tz[tz.length - 1]; },
        Z: function() { return -this.getTimezoneOffset() * 60; },
        // Full Date/Time
        c: function() { return this.format("Y-m-d\\TH:i:sP"); },
        r: function() { return this.toString(); },
        U: function() { return this.getTime() / 1000; }
    };

    // Simulates PHP's date function
    Date.prototype.format = function(format) {
        var date = this;
        return format.replace(/(\\?)(.)/g, function(_, esc, chr) {
            return (esc === '' && replaceChars[chr]) ? replaceChars[chr].call(date) : chr;
        });
    };

}).call(this);