如何从JavaScript中的当前日期获取前6个月的日期

Question

我正在尝试从当前日期算起最近六个月的日期。

 var d = new Date(); var months = ["January","February","March","April","May","June","July","August","September","October","November","December"]; alert(months[d.getMonth()-6]); 

但是我正在被udefined

Answer 1

我总是建议使用日期库来协助进行这些类型的计算。 大量的支持和示例中最受欢迎的一种是moment.js（ https://momentjs.com/ ）

要使用当前时间从当前日期开始六个月前是：

moment().subtract(6, 'months')

然后打印月份名称将是：

moment().subtract(6, 'months').format('MMMM')

Answer 2

 var d = new Date(); var months = ["January","February","March","April","May","June","July","August","September","October","November","December"]; var monthName = months[new Date(d.setMonth(d.getMonth() - 6)).getMonth()]; console.log(monthName) 

Answer 3

您必须像下面这样编写代码-

var d = new Date();
  var months = ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"];
  d.setMonth(d.getMonth() - 6);
  console.log(months[d.getMonth()]);

我们需要从日期对象中获取月份（返回-6），然后再获取。