date-vir
v5.3.2
Published
Easy and explicit dates and times
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date-vir
Easy dates and times with explicit timezones (and typed timezones).
date-vir
revolves around the new FullDate
type, which includes all the information you need to correctly pinpoint and format a given point in time. Most notably, FullDate
always includes a timezone
property, so you always know what timezone the date was originally defined in, or what timezone the date is intended to be used in:
Full docs: http://electrovir.github.io/date-vir
import {FullDate, timezones} from 'date-vir';
const myDate: FullDate = {
year: 2023,
month: 6,
day: 5,
hour: 5,
minute: 23,
second: 27,
millisecond: 652,
timezone: timezones.UTC,
};
Creating a FullDate
Several functions are available for creating FullDate
objects, with createFullDate
being the most commonly used:
import {
createFullDate,
getNowFullDate,
parseInputElementValue,
parseStrangeString,
timezones,
} from 'date-vir';
/**
* Creates a FullDate from a wide range of possible inputs. See TypeScript types for full details on
* available inputs.
*/
createFullDate('2023-06-05', timezones['Europe/Rome']);
/** Get the current date and time right now in the given timezone. */
getNowFullDate(timezones['America/Argentina/Buenos_Aires']);
/**
* Parsed the value of an <input> element directly from the element itself. This is intended to be
* used for type="date" or type="time" <input> elements, but any input element with a valid date or
* time string will work.
*/
parseInputElementValue(document.querySelector('input'), timezones['Asia/Tokyo']);
/**
* If you have a really oddly formatted date/time string and createFullDate does not suffice, you
* can have full parsing control using this function. Luxon is used under the hood for this parsing,
* so you can see all the formatString options in its docs:
* https://moment.github.io/luxon/#/parsing?id=table-of-tokens
*/
parseStrangeString({
dateString: '870-0-14-19 5 2023 6',
formatString: 'S-s-h-m d yyyy M',
timezone: timezones['America/Cancun'],
});
Outputs
FullDate
objects are easily converted into other formats (usually strings) with the included functions:
import {
FullDatePartEnum,
createFullDate,
formatPresets,
timezones,
toHtmlInputString,
toIsoString,
toLocaleString,
toTimestamp,
} from 'date-vir';
const myFullDate = createFullDate('2023-06-05T14:19:00.870Z', timezones['America/Chicago']);
/**
* Converts the given FullDate into a UTC unix timestamp with milliseconds. Since the output is a
* UTC timestamp, the number will be the same even if you convert your FullDate to a different time
* zone.
*/
toTimestamp(myFullDate); // returns 1685974740870
/**
* Converts the given FullDate into a UTC ISO string. Since the output is in UTC, even if your
* FullDate object is shifted to a different timezone, the output of this function will be the
* same.
*/
toIsoString(myFullDate); // returns '2023-06-05T14:19:00.870Z'
/**
* Converts the given FullDate to a locale-based formatted string. The second argument, the options
* argument, is optional and contains many options therein.
*/
toLocaleString(myFullDate, formatPresets.DatetimeFull); // returns 'June 5, 2023 at 9:19 AM CDT' in the en-us locale
/**
* Formats the given FullDate to a string so that it is ready to be assigned to the value attribute
* of an <input type="date" /> element.
*/
toHtmlInputString(myFullDate, FullDatePartEnum.Date); // returns '2023-06-05'
Timezone
date-vir
exposes a type-safe list of timezone names, including shortcuts for the user's timezone and the UTC timezone:
import {timezones, userTimezone, utcTimezone} from 'date-vir';
timezones['Africa/Abidjan'];
timezones['America/Los_Angeles'];
timezones['Etc/GMT+1'];
utcTimezone;
userTimezone;
Note that the current list of timezone names included in this package was generated from Firefox 106.0.2.
Luxon
The parsing and timezone conversions in date-vir
utilize the luxon
package under the hood. If you wish to gain full luxon
control over a FullDate
object, date-vir
provides an easy conversion function:
import {createFullDate, timezones, toLuxonDateTime} from 'date-vir';
const myFullDate = createFullDate('2023-06-05T14:19:00.870Z', timezones['America/Chicago']);
toLuxonDateTime(myFullDate);