过去12个月的Javascript

Question

我得到了像这样的剑道ui图表,并且必须在轴上显示今天的最后12个月.
我发现这可以将日期对象扩展到上个月.问题似乎是当我得到像"2013/05/31"这样的日期时,前几个月没有第31天.

Date.prototype.toPrevMonth = function (num) {
    var thisMonth = this.getMonth();
    this.setMonth(thisMonth-1);
    if(this.getMonth() != thisMonth-1 && (this.getMonth() != 11 || (thisMonth == 11 &&      this.getDate() == 1)))
    this.setDate(0);
}


new Date().toPrevMonth(11),
new Date().toPrevMonth(10),
new Date().toPrevMonth(9),
new Date().toPrevMonth(8),
new Date().toPrevMonth(7),
new Date().toPrevMonth(6),
new Date().toPrevMonth(5),
new Date().toPrevMonth(4),
new Date().toPrevMonth(3),
new Date().toPrevMonth(2),
new Date().toPrevMonth(1),
new Date().toPrevMonth(0)

任何人都可以帮我解决if状态吗？
该功能仅用于显示前一个月,但我需要前12个月.

还是有一个更简单的解决方案？:-)

谢谢大家!

Answer 1

包括月份的年份

var monthName = new Array("January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December");
var d = new Date();
d.setDate(1);
for (i=0; i<=11; i++) {
    console.log(monthName[d.getMonth()] + ' ' + d.getFullYear());
    d.setMonth(d.getMonth() - 1);
}

Answer 2

我还需要过去12个月的清单,这就是我所做的:

var theMonths = new Array("January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December");
var today = new Date();
var aMonth = today.getMonth();
var i;
for (i=0; i<12; i++) {
    document.writeln(theMonths[aMonth] + '<br>'); //here you can do whatever you want...
    aMonth++;
    if (aMonth > 11) {
        aMonth = 0;
    }
}

Answer 3

使用 Datejs ( http://www.datejs.com/ )

它有一个内置函数来添加月份：

Date.today().addMonths(-6);

更新： 由于您无法包含外部文件，因此以下是 Datejs 中的相关方法。

/*
 * Copyright (c) 2006-2007, Coolite Inc. (http://www.coolite.com/). All rights reserved.
 * License: Licensed under The MIT License. See license.txt and http://www.datejs.com/license/. 
 * Website: http://www.datejs.com/ or http://www.coolite.com/datejs/
*/

Date.isLeapYear = function (year) {
    return (((year % 4 === 0) && (year % 100 !== 0)) || (year % 400 === 0));
};

Date.prototype.isLeapYear = function () {
    var y = this.getFullYear();
    return (((y % 4 === 0) && (y % 100 !== 0)) || (y % 400 === 0));
};

Date.getDaysInMonth = function (year, month) {
    return [31, (Date.isLeapYear(year) ? 29 : 28), 31, 30, 31, 30, 31, 31, 30, 31, 30, 31][month];
};

Date.prototype.getDaysInMonth = function () {
    return Date.getDaysInMonth(this.getFullYear(), this.getMonth());
};

Date.prototype.addMonths = function (value) {
    var n = this.getDate();
    this.setDate(1);
    this.setMonth(this.getMonth() + value);
    this.setDate(Math.min(n, this.getDaysInMonth()));
    return this;
};