With the Node.js version, it works a bit differently. format() method, which works much like Moment's format method: Using the browser version of datetime, it will extend the Date object to have a. The dateformat Packageĭateformat is similar to Moment in that it formats dates using token strings, but it does so a bit differently. Although, not everyone can stomach adding extra dependencies, especially for front-end development, which means you may need to try out one of the next two formatting options below. Moment is by far my favorite way to handle, manipulate, and format strings in JavaScript, so I'd highly suggest checking it out. If you need to support internationalization then Moment will be a lifesaver for you. This typically isn't a big problem for small applications, but it can be a big pain for larger ones. There is also some great support for both time zones and for customizing formatted dates by different locales. Although it can be easy to forget tokens, so keep the reference handy when programming. Once you learn the concept and play around with it a bit, the rest comes easy. The list of choices gets much longer when you consider the many variations for day of month, day of week, hour, year, etc. MMMM: Month name (January, February, March.MMM: Month abbreviation (Jan, Feb, Mar.MM: Month number with leading zero (01, 02, 03.Mo: Month number with ordinal indicator (1st, 2nd, 3rd.For example, if you want to print out the month, there are 5 ways to do so: This way you can add formatting to your strings.įormat strings can get quite a bit more complicated than our example above. : All text in brackets ( ) is ignored by the parserĪll text enclosed in brackets and non-alphanumeric characters, like the colon characters (':'), are ignored by the parser.Here is a breakdown of the tokens you see above: format() method, you can construct a string of tokens that refer to a particular component of a date (like day, month, minute, or am/pm).įor example, let's say you just want to see a simple representation of the current time (hours:minutes:seconds am/pm). You should consult the docs first since there are quite a few differences. Although, a word of warning, don't assume the tokens from another language are exactly the same as those used in Moment. If you came to JavaScript from another language like Java or Python, then you'll likely be familiar with the concept of date formatting tokens. Using format tokens, dates can be customized to your liking. However, unless you're printing the date to be saved in JSON or something similar, you probably don't want your users to have to deal with dates that look like that. This will print out a date formatted in the ISO 8601 standard. format() method with no arguments: > moment().format() Now that you know roughly how to use Moment to create and manipulate dates, let's see how to use it to format your dates as strings. For a good overview of the library as a whole, check out our article, Moment.js: A Better Date Library for JavaScript. There are quite a few ways to create, parse, and manipulate dates with Moment, which we won't completely cover here. > m.month( 9) // Set month to October - months are 0-indexed! > m = moment( ' 15:37') // Parse an ISO 8601 date string > let m = moment() // Create a new date, which defaults to the current time This is a pretty big plus considering you only need to learn a single date-time library, regardless of whether you're programming the front or back-end.īefore we get in to formatting dates, let's use the Node REPL to check out a short moment primer: > const moment = require( 'moment') It works with both Node.js and browser-side JavaScript, allowing you to use it throughout your entire codebase. It is extremely easy to use, well documented, and under 20kb (minified, gzipped) in size. Moment.js is widely considered to be the best date-time library for JavaScript, and for good reason. However, you may find that one of the following solutions won't work for your application for one reason or another, in which case you can look further down the list for something that better suits your needs. Since there are a couple different ways to achieve this, I've listed them in order of my personal preference. So I'd say it's safe to assume that this is a task you'll encounter fairly often.Įach of the following sections describes a method (or library) that you can use to format dates in JavaScript. In many cases, especially apps that have dynamically generated front-end content, the dates are formatted with JavaScript code. Take a look at just about any website, whether it's an email client like Gmail, Twitter, or even on Stack Abuse articles, there is inevitably a date/time string somewhere on the page. For web applications especially, formatting a date is a pretty common task.
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