https://github.com/codebrainz/easterjs
A trivial implementation the calculate the date of Easter Sunday given a year.
https://github.com/codebrainz/easterjs
date easter holiday javascript node
Last synced: 3 months ago
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A trivial implementation the calculate the date of Easter Sunday given a year.
- Host: GitHub
- URL: https://github.com/codebrainz/easterjs
- Owner: codebrainz
- License: mit
- Created: 2019-08-05T03:33:27.000Z (almost 6 years ago)
- Default Branch: master
- Last Pushed: 2019-08-05T03:33:43.000Z (almost 6 years ago)
- Last Synced: 2025-01-15T11:48:04.564Z (5 months ago)
- Topics: date, easter, holiday, javascript, node
- Language: JavaScript
- Homepage:
- Size: 5.86 KB
- Stars: 0
- Watchers: 3
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
EasterJS
========
EasterJS is trivial JavaScript module containing a function to get the date
of Easter Sunday. It uses the [Anonymous Gregorian algorithm][1] to calculate
the date.
The minified size of the module is only 338 bytes.
[1]: https://en.wikipedia.org/wiki/Computus#Anonymous_Gregorian_algorithm
Usage
-----
The module can be used from Node or the browser. You pass a
number - the year - to the `easter` function and it returns a `Date`
object representing the date of Easter Sunday for that year.
### Node
```javascript
const easter = require('easter.min');
console.log(easter(1970));
```
### Browser
Just use a `` tag to include the `easter.js` or `easter.min.js`,
and then call `easter`, passing the year.
Tests
-----
### Node
Included is a simple test program that uses Easter dates I found on
the Internet to verify the correct dates are returned. To run the
script using Node, run `node test.js` in the source directory. There's
also an NPM script in the `package.json` called `test` which runs
the minifier before running the test.
### Browser
Also included is a silly little web page that lets you manually enter
years using a form input and it outputs the date in a paragraph tag.
To use it, open the `index.html` file in your browser and change
the input field value.
Rebuilding the Minified version
-------------------------------
There's a `minify` NPM script in the `package.json` file you can use
to re-minify the `easter.js` file, simply run `npm run minify`.