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Show EJ: datecalc - perform date calculations given a simple string pattern
source link: https://github.com/tuplo/datecalc
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datecalc
Perform date calculations given a simple string pattern.
Install
$ npm install @tuplo/datecalc # or with yarn $ yarn add @tuplo/datecalc
Usage
import datecalc from '@tuplo/datecalc';
Performs calculations assuming now by default
// assuming New Year's Day 2020, 14:00 // in two days, same time datecalc('2D'); // → new Date('2020-01-03T14:00:00') // two weeks ago datecalc('-2W'); // → new Date('2019-12-18T14:00:00') // in 15 minutes datecalc('15m'); // → new Date('2020-01-01T14:15:00') // tomorrow, two hours less than now datecalc('1D -2h'); // → new Date('2020-01-02T12:00:00')
Performs sucessive calculations
// 58 years and 2 months from now, less 4 hours datecalc('58Y 2M -4h'); // → new Date('2078-03-01T10:00:00')
Calculates from a given date
const birthday = new Date('1961-07-04T11:00:00'); // 58 years from birthday datecaclc('58Y', birthday); // → new Date('2019-07-04T11:00:00')
Accepted patterns
Pattern Period D Day W Week M Month Y Year h Hour m Minute s SecondAPI
datecalc(format: string, fromDate?: Date): Date
pattern: string
The pattern declaring what calculations to perform.
Format: /([0-9-]+[DWMYhms])/g
fromDate: Date
The starting moment from when to start calculating.
Default: new Date(Date.now())
Return value: Date
Returns a new Date
Contribute
Contributions are always welcome!
License
MIT
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