对于日期格式，最简单的方法是使用moment lib。https://momentjs.com/

const moment = require('moment')
const current = moment().utc().format('Y-M-D H:M:S')

我需要一个简单的格式化库，不需要locale和语言支持。所以我修改了

http://www.mattkruse.com/javascript/date/date.js

并且使用它。参见https://github.com/adgang/atom-time/blob/master/lib/dateformat.js

文档非常清楚。

检查下面的代码和到Date Object, Intl的链接。DateTimeFormat

// var ts_hms = new Date(UTC); // ts_hms.format("%Y-%m-%d %H:%M:%S") // exact format console.log(new Date().toISOString().replace('T', ' ').substring(0, 19)) // other formats console.log(new Date().toUTCString()) console.log(new Date().toLocaleString('en-US')) console.log(new Date().toString()) // log format const parts = new Date().toString().split(' ') console.log([parts[1], parts[2], parts[4]].join(' ')) // intl console.log(new Intl.DateTimeFormat('en-US', {dateStyle: 'long', timeStyle: 'long'}).format(new Date()))

这是我写的一个轻量级的简单日期格式库，可以在node.js和浏览器上运行

安装

使用NPM安装

npm install @riversun/simple-date-format

or

直接加载(浏览器)，

<script src="https://cdn.jsdelivr.net/npm/@riversun/simple-date-format/lib/simple-date-format.js"></script>

加载库

ES6

import SimpleDateFormat from "@riversun/simple-date-format";

CommonJS node.js)

const SimpleDateFormat = require('@riversun/simple-date-format');

Usage1

const date = new Date('2018/07/17 12:08:56');
const sdf = new SimpleDateFormat();
console.log(sdf.formatWith("yyyy-MM-dd'T'HH:mm:ssXXX", date));//to be "2018-07-17T12:08:56+09:00"

用钢笔跑

Usage2

const date = new Date('2018/07/17 12:08:56');
const sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssXXX");
console.log(sdf.format(date));//to be "2018-07-17T12:08:56+09:00"

格式化模式

https://github.com/riversun/simple-date-format#pattern-of-the-date

总的来说，我并不反对图书馆。在这种情况下，通用库似乎有些多余，除非应用程序过程的其他部分过时得很严重。

编写这样的小实用函数对于初学者和熟练的程序员来说都是一个有用的练习，对于我们中的新手来说也是一个学习经验。

function dateFormat (date, fstr, utc) {
  utc = utc ? 'getUTC' : 'get';
  return fstr.replace (/%[YmdHMS]/g, function (m) {
    switch (m) {
    case '%Y': return date[utc + 'FullYear'] (); // no leading zeros required
    case '%m': m = 1 + date[utc + 'Month'] (); break;
    case '%d': m = date[utc + 'Date'] (); break;
    case '%H': m = date[utc + 'Hours'] (); break;
    case '%M': m = date[utc + 'Minutes'] (); break;
    case '%S': m = date[utc + 'Seconds'] (); break;
    default: return m.slice (1); // unknown code, remove %
    }
    // add leading zero if required
    return ('0' + m).slice (-2);
  });
}

/* dateFormat (new Date (), "%Y-%m-%d %H:%M:%S", true) returns 
   "2012-05-18 05:37:21"  */

UPDATE 2021-10-06: Added Day.js and remove spurious edit by @ashleedawg UPDATE 2021-04-07: Luxon added by @Tampa. UPDATE 2021-02-28: It should now be noted that Moment.js is no longer being actively developed. It won't disappear in a hurry because it is embedded in so many other things. The website has some recommendations for alternatives and an explanation of why. UPDATE 2017-03-29: Added date-fns, some notes on Moment and Datejs UPDATE 2016-09-14: Added SugarJS which seems to have some excellent date/time functions.

好吧，既然还没有人给出真正的答案，那我的答案就是。

库当然是以标准方式处理日期和时间的最佳选择。在日期/时间计算中有许多边缘情况，因此能够将开发移交给库是非常有用的。

以下是主要Node兼容的时间格式化库列表:

Day.js [added 2021-10-06] "Fast 2kB alternative to Moment.js with the same modern API" Luxon [added 2017-03-29, thanks to Tampa] "A powerful, modern, and friendly wrapper for JavaScript dates and times." - MomentJS rebuilt from the ground up with immutable types, chaining and much more. Moment.js [thanks to Mustafa] "A lightweight (4.3k) javascript date library for parsing, manipulating, and formatting dates" - Includes internationalization, calculations and relative date formats - Update 2017-03-29: Not quite so light-weight any more but still the most comprehensive solution, especially if you need timezone support. - Update 2021-02-28: No longer in active development. date-fns [added 2017-03-29, thanks to Fractalf] Small, fast, works with standard JS date objects. Great alternative to Moment if you don't need timezone support. SugarJS - A general helper library adding much needed features to JavaScripts built-in object types. Includes some excellent looking date/time capabilities. strftime - Just what it says, nice and simple dateutil - This is the one I used to use before MomentJS node-formatdate TimeTraveller - "Time Traveller provides a set of utility methods to deal with dates. From adding and subtracting, to formatting. Time Traveller only extends date objects that it creates, without polluting the global namespace." Tempus [thanks to Dan D] - UPDATE: this can also be used with Node and deployed with npm, see the docs

还有一些非node库:

Datejs[感谢Peter Olson] -没有打包在npm或GitHub中，所以不太容易与Node一起使用-不太推荐，因为自2007年以来没有更新!