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dotnet-format

v1.1.0

Published

📝 Pretty accurate port of awesome .NET formatting operations for JS environment

Downloads

1,027

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Links

Git

Maintainers

kir_antipovkir_antipov

Keywords

dotnetformatsformattingformatdatenumber

Readme

dotnet-format

npm: dotnet-format License

It's 2020, and we still have no built-in tools to convert a date, number, or any other entity into a string using a custom format. Since I often write .NET programs, it looks like wildness to me, so I decided to port awesome .NET formatting operations for JS environment.

Table of Contents

  1. Installation
  2. Date formatting operations
    1. Examples
    2. Standard date and time format strings
    3. Custom date and time format strings

Installation

npm i dotnet-format

Date formatting operations

There're 3 ways to format date with this package.

  1. Import formatDate(date: Date, format: string, culture?: string) function from the main module:
import { formatDate } from "dotnet-format";

let date = new Date(0);

console.log(formatDate(date, "dd MM yyyy")); // 01 01 1970
console.log(formatDate(date, "d MMM yyyy")); // 1 Jan 1970
console.log(formatDate(date, "d MMM yyyy", "fr")); // 1 janv. 1970
console.log(formatDate(date, "dd/MM/yyyy HH:mm")); // 01/01/1970 00:00
console.log(formatDate(date, "U")); // Thursday, January 01, 1970, 12:00:00 AM
  1. Extend date protototype with format(format: string, culture?: string) function:
import * from "dotnet-format/extensions/date/format";

let date = new Date(0);

console.log(date.format("dd MM yyyy")); // 01 01 1970
console.log(date.format("d MMM yyyy")); // 1 Jan 1970
console.log(date.format("d MMM yyyy", "fr")); // 1 janv. 1970
console.log(date.format("dd/MM/yyyy HH:mm")); // 01/01/1970 00:00
console.log(date.format("U")); // Thursday, January 01, 1970, 12:00:00 AM
  1. Extend date protototype with toString(format?: string, culture?: string) function:
import * from "dotnet-format/extensions/date/toString";

let date = new Date(0);

console.log(date.toString("dd MM yyyy")); // 01 01 1970
console.log(date.toString("d MMM yyyy")); // 1 Jan 1970
console.log(date.toString("d MMM yyyy", "fr")); // 1 janv. 1970
console.log(date.toString("dd/MM/yyyy HH:mm")); // 01/01/1970 00:00
console.log(date.toString("U")); // Thursday, January 01, 1970, 12:00:00 AM

A standard date and time format string uses a single character as the format specifier to define the text representation of a Date value. Any date and time format string that contains more than one character, including white space, is interpreted as a custom date and time format string.

The following table describes the standard date and time format specifiers:

| Format specifier | Description | Examples | | ---------------- | ----------- | -------- | | "d" | Short date pattern. | 2009-06-15T13:45:30 -> 6/15/2009 (en-US)2009-06-15T13:45:30 -> 15/06/2009 (fr-FR)2009-06-15T13:45:30 -> 2009/06/15 (ja-JP) | | "D" | Long date pattern. | 2009-06-15T13:45:30 -> Monday, June 15, 2009 (en-US)2009-06-15T13:45:30 -> 15 июня 2009 г. (ru-RU)2009-06-15T13:45:30 -> Montag, 15. Juni 2009 (de-DE) | | "f" | Full date/time pattern (short time). | 2009-06-15T13:45:30 -> Monday, June 15, 2009 1:45 PM (en-US)2009-06-15T13:45:30 -> den 15 juni 2009 13:45 (sv-SE)2009-06-15T13:45:30 -> Δευτέρα, 15 Ιουνίου 2009 1:45 μμ (el-GR) | | "F" | Full date/time pattern (long time). | 2009-06-15T13:45:30 -> Monday, June 15, 2009 1:45:30 PM (en-US)2009-06-15T13:45:30 -> den 15 juni 2009 13:45:30 (sv-SE)2009-06-15T13:45:30 -> Δευτέρα, 15 Ιουνίου 2009 1:45:30 μμ (el-GR) | | "g" | General date/time pattern (short time). | 2009-06-15T13:45:30 -> 6/15/2009 1:45 PM (en-US)2009-06-15T13:45:30 -> 15/06/2009 13:45 (es-ES)2009-06-15T13:45:30 -> 2009/6/15 13:45 (zh-CN) | | "G" | General date/time pattern (long time). | 2009-06-15T13:45:30 -> 6/15/2009 1:45:30 PM (en-US)2009-06-15T13:45:30 -> 15/06/2009 13:45:30 (es-ES)2009-06-15T13:45:30 -> 2009/6/15 13:45:30 (zh-CN) | | "M", "m" | Month/day pattern. | 2009-06-15T13:45:30 -> June 15 (en-US)2009-06-15T13:45:30 -> 15. juni (da-DK)2009-06-15T13:45:30 -> 15 Juni (id-ID) | | "O", "o" | round-trip date/time pattern. | 2009-06-15T13:45:30 -> 2009-06-15T13:45:30.0000000-07:002009-06-15T13:45:30 -> 2009-06-15T13:45:30.0000000Z2009-06-15T13:45:30 -> 2009-06-15T13:45:30.0000000 | | "R", "r" | RFC1123 pattern. | 2009-06-15T13:45:30 -> Mon, 15 Jun 2009 20:45:30 GMT | | "s" | Sortable date/time pattern. | 2009-06-15T13:45:30 -> 2009-06-15T13:45:302009-06-15T13:45:30 -> 2009-06-15T13:45:30 | | "t" | Short time pattern. | 2009-06-15T13:45:30 -> 1:45 PM (en-US)2009-06-15T13:45:30 -> 13:45 (hr-HR)2009-06-15T13:45:30 -> 01:45 م (ar-EG) | | "T" | Long time pattern. | 2009-06-15T13:45:30 -> 1:45:30 PM (en-US)2009-06-15T13:45:30 -> 13:45:30 (hr-HR)2009-06-15T13:45:30 -> 01:45:30 م (ar-EG) | | "u" | Universal sortable date/time pattern. | 2009-06-15T13:45:30 -> 2009-06-15 13:45:30Z | | "U" | Universal full date/time pattern. | 2009-06-15T13:45:30 -> Monday, June 15, 2009 8:45:30 PM (en-US)2009-06-15T13:45:30 -> den 15 juni 2009 20:45:30 (sv-SE)2009-06-15T13:45:30 -> Δευτέρα, 15 Ιουνίου 2009 8:45:30 μμ (el-GR) | | "Y", "y" | Year month pattern. | 2009-06-15T13:45:30 -> June 2009 (en-US)2009-06-15T13:45:30 -> juni 2009 (da-DK)2009-06-15T13:45:30 -> Juni 2009 (id-ID) | | Any other single character | Unknown specifier. | Throws a FormatError. |

More info

A date and time format string defines the text representation of a Date value that results from a formatting operation. A custom format string consists of one or more custom date and time format specifiers. Any string that is not a standard date and time format string is interpreted as a custom date and time format string.

The following table describes the custom date and time format specifiers and displays a result string produced by each format specifier:

| Format specifier | Description | Examples | | ---------------- | ----------- | -------- | | "d" | The day of the month, from 1 through 31. | 2009-06-01T13:45:30 -> 12009-06-15T13:45:30 -> 15 | | "dd" | The day of the month, from 01 through 31. | 2009-06-01T13:45:30 -> 012009-06-15T13:45:30 -> 15 | | "ddd" | The abbreviated name of the day of the week. | 2009-06-15T13:45:30 -> Mon (en-US)2009-06-15T13:45:30 -> Пн (ru-RU)2009-06-15T13:45:30 -> lun. (fr-FR) | | "dddd" | The full name of the day of the week. | 2009-06-15T13:45:30 -> Monday (en-US)2009-06-15T13:45:30 -> понедельник (ru-RU)2009-06-15T13:45:30 -> lundi (fr-FR) | | "f" | The tenths of a second in a date and time value. | 2009-06-15T13:45:30.6170000 -> 62009-06-15T13:45:30.05 -> 0 | | "ff" | The hundredths of a second in a date and time value. | 2009-06-15T13:45:30.6170000 -> 612009-06-15T13:45:30.0050000 -> 00 | | "fff" | The milliseconds in a date and time value. | 6/15/2009 13:45:30.617 -> 6176/15/2009 13:45:30.0005 -> 000 | | "ffff" | The ten thousandths of a second in a date and time value. | 2009-06-15T13:45:30.6175000 -> 61752009-06-15T13:45:30.0000500 -> 0000 | | "fffff" | The hundred thousandths of a second in a date and time value. | 2009-06-15T13:45:30.6175400 -> 617546/15/2009 13:45:30.000005 -> 00000 | | "ffffff" | The millionths of a second in a date and time value. | 2009-06-15T13:45:30.6175420 -> 6175422009-06-15T13:45:30.0000005 -> 000000 | | "fffffff" | The ten millionths of a second in a date and time value. | 2009-06-15T13:45:30.6175425 -> 61754252009-06-15T13:45:30.0001150 -> 0001150 | | "F" | If non-zero, the tenths of a second in a date and time value. | 2009-06-15T13:45:30.6170000 -> 62009-06-15T13:45:30.0500000 -> (no output) | | "FF" | If non-zero, the hundredths of a second in a date and time value. | 2009-06-15T13:45:30.6170000 -> 612009-06-15T13:45:30.0050000 -> (no output) | | "FFF" | If non-zero, the milliseconds in a date and time value. | 2009-06-15T13:45:30.6170000 -> 6172009-06-15T13:45:30.0005000 -> (no output) | | "FFFF" | If non-zero, the ten thousandths of a second in a date and time value. | 2009-06-15T13:45:30.5275000 -> 52752009-06-15T13:45:30.0000500 -> (no output) | | "FFFFF" | If non-zero, the hundred thousandths of a second in a date and time value. | 2009-06-15T13:45:30.6175400 -> 617542009-06-15T13:45:30.0000050 -> (no output) | | "FFFFFF" | If non-zero, the millionths of a second in a date and time value. | 2009-06-15T13:45:30.6175420 -> 6175422009-06-15T13:45:30.0000005 -> (no output) | | "FFFFFFF" | If non-zero, the ten millionths of a second in a date and time value. | 2009-06-15T13:45:30.6175425 -> 61754252009-06-15T13:45:30.0001150 -> 000115 | | "g", "gg" | The period or era. | 2009-06-15T13:45:30.6170000 -> A.D. | | "h" | The hour, using a 12-hour clock from 1 to 12. | 2009-06-15T01:45:30 -> 12009-06-15T13:45:30 -> 1 | | "hh" | The hour, using a 12-hour clock from 01 to 12. | 2009-06-15T01:45:30 -> 012009-06-15T13:45:30 -> 01 | | "H" | The hour, using a 24-hour clock from 0 to 23. | 2009-06-15T01:45:30 -> 12009-06-15T13:45:30 -> 13 | | "HH" | The hour, using a 24-hour clock from 00 to 23. | 2009-06-15T01:45:30 -> 012009-06-15T13:45:30 -> 13 | | "K" | Time zone information. | 2009-06-15T13:45:30 -> -07:00 (depends on local computer settings)2009-06-15T08:45:30+00:00 --> +00:00 | | "m" | The minute, from 0 through 59. | 2009-06-15T01:09:30 -> 92009-06-15T13:29:30 -> 29 | | "mm" | The minute, from 00 through 59. | 2009-06-15T01:09:30 -> 092009-06-15T01:45:30 -> 45 | | "M" | The month, from 1 through 12. | 2009-06-15T13:45:30 -> 6 | | "MM" | The month, from 01 through 12. | 2009-06-15T13:45:30 -> 06 | | "MMM" | The abbreviated name of the month. | 2009-06-15T13:45:30 -> Jun (en-US)2009-06-15T13:45:30 -> juin (fr-FR)2009-06-15T13:45:30 -> Jun (zu-ZA) | | "MMMM" | The full name of the month. | 2009-06-15T13:45:30 -> June (en-US)2009-06-15T13:45:30 -> juni (da-DK)2009-06-15T13:45:30 -> uJuni (zu-ZA) | | "s" | The second, from 0 through 59. | 2009-06-15T13:45:09 -> 9 | | "ss" | The second, from 00 through 59. | 2009-06-15T13:45:09 -> 09 | | "t" | The first character of the AM/PM designator. | 2009-06-15T13:45:30 -> P (en-US)2009-06-15T13:45:30 -> 午 (ja-JP)2009-06-15T13:45:30 -> (fr-FR) | | "tt" | The AM/PM designator. | 2009-06-15T13:45:30 -> PM (en-US)2009-06-15T13:45:30 -> 午後 (ja-JP)2009-06-15T13:45:30 -> (fr-FR) | | "y" | The year, from 0 to 99. | 0001-01-01T00:00:00 -> 10900-01-01T00:00:00 -> 01900-01-01T00:00:00 -> 02009-06-15T13:45:30 -> 92019-06-15T13:45:30 -> 19 | | "yy" | The year, from 00 to 99. | 0001-01-01T00:00:00 -> 010900-01-01T00:00:00 -> 001900-01-01T00:00:00 -> 002019-06-15T13:45:30 -> 19 | | "yyy" | The year, with a minimum of three digits. | 0001-01-01T00:00:00 -> 0010900-01-01T00:00:00 -> 9001900-01-01T00:00:00 -> 19002009-06-15T13:45:30 -> 2009 | | "yyyy" | The year as a four-digit number. | 0001-01-01T00:00:00 -> 00010900-01-01T00:00:00 -> 09001900-01-01T00:00:00 -> 19002009-06-15T13:45:30 -> 2009 | | "yyyyy" | The year as a five-digit number. | 0001-01-01T00:00:00 -> 000012009-06-15T13:45:30 -> 02009 | | "z" | Hours offset from UTC, with no leading zeros. | 2009-06-15T13:45:30-07:00 -> -7 | | "zz" | Hours offset from UTC, with a leading zero for a single-digit value. | 2009-06-15T13:45:30-07:00 -> -07 | | "zzz" | Hours and minutes offset from UTC. | 2009-06-15T13:45:30-07:00 -> -07:00 | | ":" | The time separator. | 2009-06-15T13:45:30 -> : (en-US)2009-06-15T13:45:30 -> . (it-IT)2009-06-15T13:45:30 -> : (ja-JP) | | "/" | The date separator. | 2009-06-15T13:45:30 -> / (en-US)2009-06-15T13:45:30 -> - (ar-DZ)2009-06-15T13:45:30 -> . (tr-TR) | | "string"'string' | Literal string delimiter. | 2009-06-15T13:45:30 ("arr:" h:m t) -> arr: 1:45 P2009-06-15T13:45:30 ('arr:' h:m t) -> arr: 1:45 P | | % | Defines the following character as a custom format specifier. | 2009-06-15T13:45:30 (%h) -> 1 | | \ | The escape character. | 2009-06-15T13:45:30 (h \h) -> 1 h | | Any other character | The character is copied to the result string unchanged. | 2009-06-15T01:45:30 (arr hh:mm t) -> arr 01:45 A |

More info