在 JavaScript 中为日期添加一个月
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Add One Month to a Date in JavaScript
提问by leora
I have an input field that needs to be incremented by one month using the JavaScript Date object. Below is an example of an effort I have made in incrementing the month. The issue with this seems to be that it will display 0 as January and does not increment the year.
我有一个需要使用 JavaScript 日期对象递增一个月的输入字段。下面是我在增加月份方面所做的努力的一个例子。与此有关的问题似乎是它会将 0 显示为一月，并且不会增加年份。
nDate.setDate(nDate.getDate());
inputBox1.value = (nDate.getMonth() + 1) + "/" + (nDate.getDate()) + "/" + (nDate.getFullYear());
回答by Salman A
Use Date.setMonth:
var d = new Date(2000, 0, 1); // January 1, 2000
d.setMonth(d.getMonth() + 1);
console.log(d.getFullYear(), d.getMonth() + 1, d.getDate());Date.setMonthis range proof i.e. months other than 0...11 are adjusted automatically.
Date.setMonth是范围证明，即自动调整 0...11 以外的月份。
回答by Mark Pope
You'll have to get the text out of the text box, which you can then pass to the Date() constructor:
您必须从文本框中获取文本，然后可以将其传递给 Date() 构造函数：
var d = new Date(text);
var d = new Date(text);
Then format the date string:
然后格式化日期字符串：
var str = d.getDate(), d.getMonth() + 1, d.getFullYear()
var str = d.getDate(), d.getMonth() + 1, d.getFullYear()
And set the test box to that value
并将测试框设置为该值
