datetime-calc
Simple arithmetic calculation DSL to use when entering dates
This package utilised the current date to allow text in a simple Domain Specific Language to be parsed into a Date. The intended usage is to handle text entered into a form input field, to allow a more flexible way to enter date values.
What it does
Assuming the current date is the 2nd of March, 2019 and the browser locale short date format is dd/mm/yyyy, some example values for entering explicit dates are:
| Input | Result | Description |
|---|---|---|
| "14/06/2019" | 2019-06-14 | Dates can be entered in full as per a standard date field |
| "6" | 2019-03-06 | The sixth of the current month and year |
| "1204" | 2019-04-12 | April 12th of the current year |
| "231222 | 2022-12-23 | Explicit date with two digit year and no separators |
| "12.04.89" | 1989-04-12 | Several common separators are supported |
| "3-4" | 2019-04-03 | separators can be used for partial dates |
| "t" | 2019-03-02 | "t" is a shorthand for the current date ("today") |
Additionally, simple arithmetic is also available to build the new Dates. Available values are (d)ays, (w)eeks, (m)onths and (y)ears. For example:
| Input | Result | Description |
|---|---|---|
| "t+2m" | 2019-05-02 | Today plus two months |
| "t-1w" | 2019-02-23 | A week ago |
| "t+2w-1d" | 2019-03-15 | Multiple terms are supported |
| "2512-2w" | 2019-12-11 | Two weeks before Christmas |
| "t+3" | 2019-03-05 | "Days" is assumed if only a number is specified |