javascript - 如何从当前日期获取过去 12 个月的年份

Question

我想显示过去 12 个月，但年份没有附加到列表中

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;
  }
}

如何从当前月份获取过去 12 个月的年份。

Answer 1

如果您想在输出日期中包含年份，那么最简单的方法是在循环中将当前日期加 1 个月。然后，您可以在循环中从该日期检索月份和年份，如下所示:

var theMonths = new Array("January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December");
var now = new Date();

for (var i = 0; i < 12; i++) {
  var future = new Date(now.getFullYear(), now.getMonth() + i, 1);
  var month = theMonths[future.getMonth()];
  var year = future.getFullYear();
  console.log(month, year);
}

请注意，从您的问题中复制的此循环会在未来几个月内得到，但您的描述表明您想要检索过去的月份。在这种情况下，您只需要使用 i-- 从 0 循环到 > -12。