<script>
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(/yy(?:yy)?|M{1,4}|d{1,4}|h(?:h)?|H(?:H)?|m(?:m)?|s(?:s)?|l|L|tt|TT|Z/g, function ($0) {
switch ($0) {
case 'd':
return d.getDate();
case 'dd':
return zeroize(d.getDate());
case 'ddd':
return ['日', '一', '二', '三', '四', '五', '六'][d.getDay()];
case 'dddd':
return ['星期日', '星期一', '星期二', '星期三', '星期四', '星期五', '星期六'][d.getDay()];
case 'M':
return d.getMonth() + 1;
case 'MM':
return zeroize(d.getMonth() + 1);
case 'MMM':
return ['一', '二', '三', '四', '五', '六', '七', '八', '九', '十', '十一', '十二'][d.getMonth()];
case 'MMMM':
return ['一月', '二月', '三月', '四月', '五月', '六月', '七月', '八月', '九月', '十月', '十一月', '十二月'][d.getMonth()];
case 'yy':
return String(d.getFullYear()).substr(2);
case 'yyyy':
return d.getFullYear();
case 'h':
return d.getHours() % 12 || 12;
case 'hh':
return zeroize(d.getHours() % 12 || 12);
case 'H':
return d.getHours();
case 'HH':
return zeroize(d.getHours());
case 'm':
return d.getMinutes();
case 'mm':
return zeroize(d.getMinutes());
case 's':
return d.getSeconds();
case 'ss':
return zeroize(d.getSeconds());
case 'l':
return zeroize(d.getMilliseconds(), 3);
case 'L':
var m = d.getMilliseconds();
if (m > 99) m = Math.round(m / 10);
return zeroize(m);
case 'tt':
return d.getHours() < 12 ? 'am' : 'pm';
case 'TT':
return d.getHours() < 12 ? 'AM' : 'PM';
case 'Z':
return d.toUTCString().match(/[A-Z]+$/);
// Return quoted strings with the surrounding quotes removed
default:
return $0.substr(1, $0.length - 2);
}
});
};
Date.prototype.prev = function () {
var date = new Date(this);
var n = Math.abs(arguments[0]);
if (isNaN(n) || 1 > n) n = 1;
date.setDate(date.getDate() - n);
return date;
};
Date.prototype.next = function () {
var date = new Date(this);
var n = Math.abs(arguments[0]);
if (isNaN(n) || 1 > n) n = 1;
date.setDate(date.getDate() + n);
return date;
};
Date.prototype.weekRangeToNow = function () {
var day = this.getDay();
if (0 == day) {
return [this.prev(6), new Date(this)];
} else {
if (0 == (day - 1)) return [new Date(this), new Date(this)];
return [this.prev(day - 1), new Date(this)];
}
};
Date.prototype.weekRange = function () {
var day = this.getDay();
if (0 == day) {
return [this.prev(6), new Date(this)];
} else {
var start = this.prev(day - 1);
return [start, start.next(6)];
}
};
Date.prototype.prevWeekRange = function () {
var n = Math.abs(arguments[0]);
var date = this.prev(7 * ((isNaN(n) || 1 > n) ? 1 : n));
return date.weekRange();
};
Date.prototype.nextWeekRange = function () {
var n = Math.abs(arguments[0]);
var date = this.next(7 * ((isNaN(n) || 1 > n) ? 1 : n));
return date.weekRange();
};
Date.prototype.monthRangeToNow = function () {
return [new Date(this.getFullYear(), this.getMonth(), 1), new Date(this)];
};
Date.prototype.monthRange = function () {
var date = new Date(this);
date.setMonth(date.getMonth() + 1);
date.setDate(0);
return [new Date(this.getFullYear(), this.getMonth(), 1), date];
};
Date.prototype.prevMonthRange = function () {
var date = new Date(this);
var n = Math.abs(arguments[0]);
if (isNaN(n) || 1 > n) n = 1;
date.setMonth(date.getMonth() - (n - 1));
date.setDate(0);
return [new Date(date.getFullYear(), date.getMonth(), 1), date];
};
Date.prototype.nextMonthRange = function () {
var date = new Date(this);
var n = Math.abs(arguments[0]);
if (isNaN(n) || 1 > n) n = 1;
date.setMonth(date.getMonth() + (n + 1));
date.setDate(0);
return [new Date(date.getFullYear(), date.getMonth(), 1), date];
};
console.log("format => " + new Date().format("yyyy-MM-dd"));
console.log("prev => " + new Date().prev().format("yyyy-MM-dd"));
console.log("next => " + new Date().next().format("yyyy-MM-dd"));
var range = new Date().weekRangeToNow();
console.log("weekRangeToNow => " + range[0].format("yyyy-MM-dd - ") + range[1].format("yyyy-MM-dd"));
range = new Date().weekRange();
console.log("weekRange => " + range[0].format("yyyy-MM-dd - ") + range[1].format("yyyy-MM-dd"));
range = new Date().prevWeekRange();
console.log("prevWeekRange => " + range[0].format("yyyy-MM-dd - ") + range[1].format("yyyy-MM-dd"));
range = new Date().nextWeekRange();
console.log("nextWeekRange => " + range[0].format("yyyy-MM-dd - ") + range[1].format("yyyy-MM-dd"));
range = new Date().monthRangeToNow();
console.log("monthRangeToNow => " + range[0].format("yyyy-MM-dd - ") + range[1].format("yyyy-MM-dd"));
range = new Date().monthRange();
console.log("monthRange => " + range[0].format("yyyy-MM-dd - ") + range[1].format("yyyy-MM-dd"));
range = new Date().prevMonthRange();
console.log("prevMonthRange => " + range[0].format("yyyy-MM-dd - ") + range[1].format("yyyy-MM-dd"));
range = new Date().nextMonthRange();
console.log("nextMonthRange => " + range[0].format("yyyy-MM-dd - ") + range[1].format("yyyy-MM-dd"));
</script>
javascript Date prototype 擴展
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