Javascript 在javascript中以mm格式获取月份

Get month in mm format in javascript

提问by Michael Kniskern

How do I retrieve the month from the current date in mmformat? (i.e. "05")

如何以mm格式从当前日期中检索月份？（即“05”）

This is my current code:

这是我当前的代码：

var currentDate = new Date();
var currentMonth = currentDate.getMonth() + 1;

回答by Gert Grenander

An alternative way:

另一种方式：

var currentMonth=('0'+(currentDate.getMonth()+1)).slice(-2)

回答by Matt

if (currentMonth < 10) { currentMonth = '0' + currentMonth; }

回答by Fernando Felix

One line solution:

一行解决方案：

var currentMonth = (currentDate.getMonth() < 10 ? '0' : '') + currentDate.getMonth();

回答by Benjie Junio

for the date:

日期：

("0" + this.getDate()).slice(-2)

and similar for the month:

本月类似：

("0" + (this.getMonth() + 1)).slice(-2)

回答by Simon Arnold

ES6 version, inpired by Gert Grenander

ES6 版本，灵感来自 Gert Grenander

let date = new Date();
let month = date.getMonth()+1;
month = `0${month}`.slice(-2);

回答by Igor Pavelek

If you do this

如果你这样做

var currentDate = new Date();
var currentMonth = currentDate.getMonth() + 1;

then currentMonth is a number, which you can format as you want, see this question that will help you with formatting: How can I format an integer to a specific length in javascript?

那么 currentMonth 是一个数字，您可以根据需要对其进行格式化，请参阅此问题以帮助您进行格式化：How can I format an integer to a specific length in javascript？

回答by Igor Pavelek

var CurrentDate = new Date();
    CurrentDate.setMonth(CurrentDate.getMonth());

    var day = CurrentDate.getDate();
    var monthIndex = CurrentDate.getMonth()+1;
    if(monthIndex<10){
        monthIndex=('0'+monthIndex);
    }
    var year = CurrentDate.getFullYear();

    alert(monthIndex);

回答by eyelidlessness

In order for the accepted answer to return a string consistently, it should be:

为了让接受的答案一致地返回一个字符串，它应该是：

if(currentMonth < 10) {
    currentMonth = '0' + currentMonth;
} else {
    currentMonth = '' + currentMonth;
}

Or:

或者：

currentMonth = (currentMonth < 10 ? '0' : '') + currentMonth;

Just for funsies, here's a version without a conditional:

只是为了好玩，这里有一个没有条件的版本：

currentMonth = ('0' + currentMonth).slice(-2);

Edit: switched to slice, per Gert G's answer, credit where credit is due; substrworks too, I didn't realize it accepts a negative startargument

编辑：切换到slice，根据 Gert G 的回答，信用到期；substr也有效，我没有意识到它接受否定start论点

回答by Hillsie

An alternative with ES6 template strings

ES6 模板字符串的替代方案

A solution for mm/yyyy. Not quite the question, but I guess remove the second part.

的解决方案mm/yyyy。不完全是问题，但我想删除第二部分。

const MonthYear = `${dateObj.getMonth() < 10 ? '0' : '' }${dateObj.getMonth()+1}/${dateObj.getFullYear()}`

const Month = `${dateObj.getMonth() < 10 ? '0' : '' }${dateObj.getMonth()+1}`