javascript - 从日期中添加/减去天数不会正确更改年/月

Question

如果我有一个日期是 2011-01-02 并且我从该日期减去 7 天它应该给我 2010-12-26，但它给了我 2011-01-26?

查看下面的 JS 以验证链接:

var date = new Date('2011','01','02');
alert('the original date is '+date);
var newdate = new Date(date);
newdate = newdate.setDate(newdate.getDate() - 7);
var nd = new Date(newdate);
alert('the new date is '+nd);

http://jsbin.com/upeyu/6

Answer 1

我想你是想这样做:(完美地工作)

var date = new Date('2011','01','02');
alert('the original date is '+date);
var newdate = new Date(date);
newdate.setDate(newdate.getDate() - 7);
var nd = new Date(newdate);
alert('the new date is '+nd);

jsFiddle example