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135 lines
4.9 KiB
135 lines
4.9 KiB
1 month ago
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# dateformat
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A node.js package for Steven Levithan's excellent [dateFormat()][dateformat] function.
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[](https://travis-ci.org/felixge/node-dateformat)
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## Modifications
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* Removed the `Date.prototype.format` method. Sorry folks, but extending native prototypes is for suckers.
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* Added a `module.exports = dateFormat;` statement at the bottom
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* Added the placeholder `N` to get the ISO 8601 numeric representation of the day of the week
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## Installation
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```bash
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$ npm install dateformat
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$ dateformat --help
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```
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## Usage
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As taken from Steven's post, modified to match the Modifications listed above:
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```js
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var dateFormat = require('dateformat');
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var now = new Date();
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// Basic usage
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dateFormat(now, "dddd, mmmm dS, yyyy, h:MM:ss TT");
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// Saturday, June 9th, 2007, 5:46:21 PM
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// You can use one of several named masks
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dateFormat(now, "isoDateTime");
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// 2007-06-09T17:46:21
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// ...Or add your own
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dateFormat.masks.hammerTime = 'HH:MM! "Can\'t touch this!"';
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dateFormat(now, "hammerTime");
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// 17:46! Can't touch this!
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// You can also provide the date as a string
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dateFormat("Jun 9 2007", "fullDate");
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// Saturday, June 9, 2007
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// Note that if you don't include the mask argument,
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// dateFormat.masks.default is used
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dateFormat(now);
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// Sat Jun 09 2007 17:46:21
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// And if you don't include the date argument,
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// the current date and time is used
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dateFormat();
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// Sat Jun 09 2007 17:46:22
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// You can also skip the date argument (as long as your mask doesn't
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// contain any numbers), in which case the current date/time is used
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dateFormat("longTime");
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// 5:46:22 PM EST
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// And finally, you can convert local time to UTC time. Simply pass in
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// true as an additional argument (no argument skipping allowed in this case):
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dateFormat(now, "longTime", true);
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// 10:46:21 PM UTC
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// ...Or add the prefix "UTC:" or "GMT:" to your mask.
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dateFormat(now, "UTC:h:MM:ss TT Z");
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// 10:46:21 PM UTC
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// You can also get the ISO 8601 week of the year:
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dateFormat(now, "W");
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// 42
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// and also get the ISO 8601 numeric representation of the day of the week:
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dateFormat(now,"N");
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// 6
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```
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### Mask options
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Mask | Description
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---- | -----------
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`d` | Day of the month as digits; no leading zero for single-digit days.
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`dd` | Day of the month as digits; leading zero for single-digit days.
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`ddd` | Day of the week as a three-letter abbreviation.
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`dddd` | Day of the week as its full name.
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`m` | Month as digits; no leading zero for single-digit months.
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`mm` | Month as digits; leading zero for single-digit months.
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`mmm` | Month as a three-letter abbreviation.
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`mmmm` | Month as its full name.
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`yy` | Year as last two digits; leading zero for years less than 10.
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`yyyy` | Year represented by four digits.
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`h` | Hours; no leading zero for single-digit hours (12-hour clock).
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`hh` | Hours; leading zero for single-digit hours (12-hour clock).
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`H` | Hours; no leading zero for single-digit hours (24-hour clock).
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`HH` | Hours; leading zero for single-digit hours (24-hour clock).
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`M` | Minutes; no leading zero for single-digit minutes.
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`MM` | Minutes; leading zero for single-digit minutes.
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`N` | ISO 8601 numeric representation of the day of the week.
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`o` | GMT/UTC timezone offset, e.g. -0500 or +0230.
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`s` | Seconds; no leading zero for single-digit seconds.
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`ss` | Seconds; leading zero for single-digit seconds.
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`S` | The date's ordinal suffix (st, nd, rd, or th). Works well with `d`.
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`l` | Milliseconds; gives 3 digits.
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`L` | Milliseconds; gives 2 digits.
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`t` | Lowercase, single-character time marker string: a or p.
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`tt` | Lowercase, two-character time marker string: am or pm.
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`T` | Uppercase, single-character time marker string: A or P.
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`TT` | Uppercase, two-character time marker string: AM or PM.
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`W` | ISO 8601 week number of the year, e.g. 42
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`Z` | US timezone abbreviation, e.g. EST or MDT. With non-US timezones or in the
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`'...'`, `"..."` | Literal character sequence. Surrounding quotes are removed.
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`UTC:` | Must be the first four characters of the mask. Converts the date from local time to UTC/GMT/Zulu time before applying the mask. The "UTC:" prefix is removed.
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### Named Formats
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Name | Mask | Example
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---- | ---- | -------
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`default` | `ddd mmm dd yyyy HH:MM:ss` | Sat Jun 09 2007 17:46:21
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`shortDate` | `m/d/yy` | 6/9/07
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`mediumDate` | `mmm d, yyyy` | Jun 9, 2007
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`longDate` | `mmmm d, yyyy` | June 9, 2007
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`fullDate` | `dddd, mmmm d, yyyy` | Saturday, June 9, 2007
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`shortTime` | `h:MM TT` | 5:46 PM
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`mediumTime` | `h:MM:ss TT` | 5:46:21 PM
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`longTime` | `h:MM:ss TT Z` | 5:46:21 PM EST
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`isoDate` | `yyyy-mm-dd` | 2007-06-09
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`isoTime` | `HH:MM:ss` | 17:46:21
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`isoDateTime` | `yyyy-mm-dd'T'HH:MM:ss` | 2007-06-09T17:46:21
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`isoUtcDateTime` | `UTC:yyyy-mm-dd'T'HH:MM:ss'Z'` | 2007-06-09T22:46:21Z
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## License
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(c) 2007-2009 Steven Levithan [stevenlevithan.com][stevenlevithan], MIT license.
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[dateformat]: http://blog.stevenlevithan.com/archives/date-time-format
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[stevenlevithan]: http://stevenlevithan.com/
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