@qntm-code/string-to-date

Parse a wide range of date formats including human-input dates.

![GitHub release](https://github.com/bameyrick/string-to-date/releases)
![Quality Gate Status](https://sonarcloud.io/summary/new_code?id=bameyrick_string-to-date)
![codecov](https://codecov.io/gh/bameyrick/string-to-date)

Installation

``bash npm install @qntm-code/string-to-date`

or

`bash yarn add @qntm-code/string-to-date`

`Table of Contents`

- @qntm-code/string-to-date - Installation - Table of Contents - Usage - Supported formats - Locale Support - Adding custom formats - Example 1: matcher + units - Example 2: matcher + handler - Example 3: template + units - Example 4: template + handler - Removing parsing rules - Creating a custom parser - Unit tests - Testing - Contributing - Exhaustive list of date formats - Credits

`Usage`

There are two ways to use string-to-date:

1.) Return a Dateobject.

parse() arguments:

| argument | type | description | optional | | -------- | -------- | ------------------- | -------- | |input | string| The string to parse | no | |locale | string | The locale to use | yes |

Example:

`typescript import StringToDate from '@qntm-code/string-to-date';

StringToDate.parse('2020-10-15'); // same as new Date(2020, 9, 15, 0, 0, 0, 0)`

If the string cannot be parsed, null is returned.

2.) Return an object with one or more integer values for the following keys: year, month, day, hour, minute, second, millisecond, offset.

parseToObject() arguments:

Example:

`typescript import StringToDate from '@qntm-code/string-to-date'

StringToDate.parseToObject('15 Oct 2020 at 6pm'); // returns: { year: 2020, month: 10, day: 15, hour: 18, }`

If the string cannot be parsed, null is returned.

`Supported formats`

Summary:

- 24 hour time - 12 hour time - timezone offsets - timezone abbreviations - year month day - year monthname day - month day year - monthname day year - day month year - day monthname year - +/-/ago periods - now/today/yesterday/tomorrow - Twitter

Exhaustive list of date formats

`Locale Support`

string-to-date supports any locale that your runtime's Intl(ECMAScript Internationalization API) supports. In browsers that usually means the operating system language. In Node, that means the compiled language or the icu modules included.

`Adding custom formats`

string-to-date has an addFormat() function to add a custom parser.

First, parsers must have matcher or template.

- matcher: A RegExp to match a string -template: A string with template variables such as _YEAR_ _MONTH_etc. that will be converted to a regular expression

Second, parsers must have units or handler.

- units: An array of unit strings to fit matches into (year, month, day, etc.) -handler: A function that takes matches and returns an object with keys year, month, day etc.

`$3`

`typescript import StringToDate from '@qntm-code/string-to-date';

parser.addFormat( new Format({ matcher: /^(\d+) days? into month (\d+) in year (\d{4})$/, units: ['day', 'month', 'year'], }) );`

Keep in mind that \ddoes not support other numbering system such as Chinese or Bengali. To support those you can use thetemplateoption given in example 3 and example 4.

`$3`

`typescript import StringToDate from '@qntm-code/string-to-date';

parser.addFormat( new Format({ matcher: /^Q([1-4]) (\d{4})$/, handler: function ([, quarter, year]) { const monthByQuarter = { 1: 1, 2: 4, 3: 7, 4: 10 }; const month = monthByQuarter[quarter]; return { year, month }; }, }) );`

`$3`

`typescript import StringToDate from '@qntm-code/string-to-date';

parser.addFormat( new Format({ template: 'The (_DAY_)(?:_ORDINAL_) day of (_MONTH_), (_YEAR_)', units: ['day', 'month', 'year'], }) );`

`$3`

`typescript import StringToDate from '@qntm-code/string-to-date';

parser.addFormat( new Format({ template: '^Q([1-4]) (_YEAR_)$', handler: function ([, quarter, year]) { const monthByQuarter = { 1: 1, 2: 4, 3: 7, 4: 10 }; const month = monthByQuarter[quarter]; return { year, month }; }, }) );`

`$3`

To remove support for a certain format, use removeFormat()

`typescript import StringToDate, { dayMonth } from '@qntm-code/string-to-date';

parser.removeFormat(dayMonth);`

`$3`

To create a new parser with a limited list of formats or your own custom formats, usenew Parser

`typescript import { Parser, time24Hours, yearMonthDay, ago } from '@qntm-code/string-to-date';

const parser = new Parser();

parser.addFormats([time24Hours, yearMonthDay, ago]);`

`Unit tests`

`$3`

- To run tests, run npm test

`Contributing`

Contributions are welcome. Please open a GitHub ticket for bugs or feature requests. Please make a pull request for any fixes or new code you'd like to be incorporated.

`Exhaustive list of date formats`

24 hour time (any date format followed by a 24-hour time expression)

- 2020-10-06 17:41:28 - 2020-10-06T17:41:28Z - 17:41:28 - 2020-10-06T17:41:28.999Z - 2020-10-06T17:41:28.999999Z - 2020-10-06T17:41:28.999999999Z - 2020-10-06T17:41:28 MST - 2020-10-06T17:41:28 Eastern Daylight Time - 2020-10-06T17:41:28 GMT+03:00 - 2020-10-06T17:41:28 GMT-9 - 2020-10-06T17:41:28-09:00 - 2020-10-06T17:41:28+0900

12 hour time (any date format followed by a 12-hour time expression)

- March 14, 2015 at 9:26:53 am - 14 Mar 2015 9:26:53 a.m. - 9:26:53am - 9:26pm - 9pm

day monthname year

- Wednesday, 01 January 2020 - Wednesday 01 January 2020 - Wed, 01 January 2020 - Wed 01 January 2020 - 01 January 2020 - 01-January-2020 - 1 Jan 2020 - 1-Jan-2020 - 01 Jan 20 - 1 Jan 20

monthname day year

- Sunday, March 27 2016 - Sunday March 27 2016 - Sun, March 27 2016 - Sun March 27 2016 - March 27 2016 - Mar 27, 2016 - Mar 27 2016

month day year

- 03/14/2020 - 03-14-2020 - 03.14.2020 - 03 14 2020 - 3/14/2020 - 3-14-2020 - 3.14.2020 - 3 14 2020 - 03/14/20 - 03-14-20 - 03.14.20 - 03 14 20 - 3/14/20 - 3-14-20 - 3.14.20 - 3 14 20

day month year

- 14/03/2020 - 14.03.2020 - 14-03-2020 - 14 03 2020 - 14/3/2020 - 14.3.2020 - 14-3-2020 - 14 3 2020 - 14/03/20 - 14.03.20 - 14-03-20 - 14 03 20 - 14/3/20 - 14.3.20 - 14-3-20 - 14 3 20

year month day

- 2016/09/24 - 2016/09/24 - 2016/9/24 - 2016/9/24 - 16/09/24 - 16/09/24 - 16/9/24 - 16/9/24 - 2016-09-24 - 2016-09-24 - 2016-9-24 - 2016-9-24 - 16-09-24 - 16-09-24 - 16-9-24 - 16-9-24 - 2016 09 24 - 2016 09 24 - 2016 9 24 - 2016 9 24 - 16 09 24 - 16 09 24 - 16 9 24 - 16 9 24 - 2016.09.24 - 2016.09.24 - 2016.9.24 - 2016.9.24 - 16.09.24 - 16.09.24 - 16.9.24 - 16.9.24 - 20160924 - 20160924 - 2016924 - 2016924 - 160924 - 160924 - 16924 - 16924

relative time

- 5 minutes ago - -8 months - in 13 days - +21 weeks

monthname day

- Sunday, June 28 - Sunday June 28 - Sun, June 28 - Sun June 28 - June 28 - Jun 28

day monthname

- 16 March - 16 Mar

month day

- 03/14 - 03-14 - 3/14 - 3-14

day month

- 14/03 - 14.03 - 14/3 - 14.3

Twitter

- Fri Apr 09 12:53:54 +0000 2010

unix timestamp

- @1602604901

Microsoft JSON date string

- /Date(1601677889008-0700)/-/Date(1601677889008)/

chinese

- 2020年09月26日-2020年9月26日-2020 年 9 月 26 日-２０１７年０８月３１日`

Credits

This package is based on any-date-parser by Ken Snyder

@qntm-code/string-to-date

Parse a wide range of date formats including human-input dates.

Installation

``bash npm install @qntm-code/string-to-date`

or

`bash yarn add @qntm-code/string-to-date`

`Table of Contents`

`Usage`

There are two ways to use string-to-date:

1.) Return a Dateobject.

parse() arguments:

Example:

`typescript import StringToDate from '@qntm-code/string-to-date';

StringToDate.parse('2020-10-15'); // same as new Date(2020, 9, 15, 0, 0, 0, 0)`

If the string cannot be parsed, null is returned.

2.) Return an object with one or more integer values for the following keys: year, month, day, hour, minute, second, millisecond, offset.

parseToObject() arguments:

Example:

`typescript import StringToDate from '@qntm-code/string-to-date'

StringToDate.parseToObject('15 Oct 2020 at 6pm'); // returns: { year: 2020, month: 10, day: 15, hour: 18, }`

If the string cannot be parsed, null is returned.

`Supported formats`

Summary:

Exhaustive list of date formats

`Locale Support`

`Adding custom formats`

string-to-date has an addFormat() function to add a custom parser.

First, parsers must have matcher or template.

- matcher: A RegExp to match a string -template: A string with template variables such as _YEAR_ _MONTH_etc. that will be converted to a regular expression

Second, parsers must have units or handler.

- units: An array of unit strings to fit matches into (year, month, day, etc.) -handler: A function that takes matches and returns an object with keys year, month, day etc.

`$3`

`typescript import StringToDate from '@qntm-code/string-to-date';

parser.addFormat( new Format({ matcher: /^(\d+) days? into month (\d+) in year (\d{4})$/, units: ['day', 'month', 'year'], }) );`

Keep in mind that \ddoes not support other numbering system such as Chinese or Bengali. To support those you can use thetemplateoption given in example 3 and example 4.

`$3`

`typescript import StringToDate from '@qntm-code/string-to-date';

`$3`

`typescript import StringToDate from '@qntm-code/string-to-date';

parser.addFormat( new Format({ template: 'The (_DAY_)(?:_ORDINAL_) day of (_MONTH_), (_YEAR_)', units: ['day', 'month', 'year'], }) );`

`$3`

`typescript import StringToDate from '@qntm-code/string-to-date';

`$3`

To remove support for a certain format, use removeFormat()

`typescript import StringToDate, { dayMonth } from '@qntm-code/string-to-date';

parser.removeFormat(dayMonth);`

`$3`

To create a new parser with a limited list of formats or your own custom formats, usenew Parser

`typescript import { Parser, time24Hours, yearMonthDay, ago } from '@qntm-code/string-to-date';

const parser = new Parser();

parser.addFormats([time24Hours, yearMonthDay, ago]);`

`Unit tests`

`$3`

- To run tests, run npm test

`Contributing`

Contributions are welcome. Please open a GitHub ticket for bugs or feature requests. Please make a pull request for any fixes or new code you'd like to be incorporated.

`Exhaustive list of date formats`

24 hour time (any date format followed by a 24-hour time expression)

12 hour time (any date format followed by a 12-hour time expression)

- March 14, 2015 at 9:26:53 am - 14 Mar 2015 9:26:53 a.m. - 9:26:53am - 9:26pm - 9pm

day monthname year

- Wednesday, 01 January 2020 - Wednesday 01 January 2020 - Wed, 01 January 2020 - Wed 01 January 2020 - 01 January 2020 - 01-January-2020 - 1 Jan 2020 - 1-Jan-2020 - 01 Jan 20 - 1 Jan 20

monthname day year

- Sunday, March 27 2016 - Sunday March 27 2016 - Sun, March 27 2016 - Sun March 27 2016 - March 27 2016 - Mar 27, 2016 - Mar 27 2016

month day year

- 03/14/2020 - 03-14-2020 - 03.14.2020 - 03 14 2020 - 3/14/2020 - 3-14-2020 - 3.14.2020 - 3 14 2020 - 03/14/20 - 03-14-20 - 03.14.20 - 03 14 20 - 3/14/20 - 3-14-20 - 3.14.20 - 3 14 20

day month year

- 14/03/2020 - 14.03.2020 - 14-03-2020 - 14 03 2020 - 14/3/2020 - 14.3.2020 - 14-3-2020 - 14 3 2020 - 14/03/20 - 14.03.20 - 14-03-20 - 14 03 20 - 14/3/20 - 14.3.20 - 14-3-20 - 14 3 20

year month day

relative time

- 5 minutes ago - -8 months - in 13 days - +21 weeks

monthname day

- Sunday, June 28 - Sunday June 28 - Sun, June 28 - Sun June 28 - June 28 - Jun 28

day monthname

- 16 March - 16 Mar

month day

- 03/14 - 03-14 - 3/14 - 3-14

day month

- 14/03 - 14.03 - 14/3 - 14.3

Twitter

- Fri Apr 09 12:53:54 +0000 2010

unix timestamp

- @1602604901

Microsoft JSON date string

- /Date(1601677889008-0700)/-/Date(1601677889008)/

chinese

- 2020年09月26日-2020年9月26日-2020 年 9 月 26 日-２０１７年０８月３１日`

Credits

This package is based on any-date-parser by Ken Snyder