Initial commit

.gitignore

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+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# TypeScript v1 declaration files
+typings/
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variables file
+.env
+
+# parcel-bundler cache (https://parceljs.org/)
+.cache
+
+# next.js build output
+.next
+
+# nuxt.js build output
+.nuxt
+
+# vuepress build output
+.vuepress/dist
+
+# Serverless directories
+.serverless
+
+# FuseBox cache
+.fusebox/

LICENSE

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+MIT License
+
+Copyright (c) 2019 Brian Douglas
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+<h1 align="center">@github-craftwork/theweeknum 👋</h1>
+<p>
+  <a href="https://www.npmjs.com/package/theweeknum">
+    <img alt="Version" src="https://img.shields.io/npm/v/theweeknum.svg">
+  </a>
+  <a href="https://github.com/bdougie/theWeekNum#readme">
+    <img alt="Documentation" src="https://img.shields.io/badge/documentation-yes-brightgreen.svg" target="_blank" />
+  </a>
+  <a href="https://github.com/bdougie/theWeekNum/graphs/commit-activity">
+    <img alt="Maintenance" src="https://img.shields.io/badge/Maintained%3F-yes-green.svg" target="_blank" />
+  </a>
+  <a href="https://github.com/bdougie/theWeekNum/blob/master/LICENSE">
+    <img alt="License: MIT" src="https://img.shields.io/badge/License-MIT-yellow.svg" target="_blank" />
+  </a>
+</p>
+
+> a package that tells you the week number
+
+### 🏠 [Homepage](https://github.com/bdougie/theWeekNum#readme)
+
+
+## Usage
+
+```
+const weekNum = require('@github-craftwork/theweeknum')
+
+console.log(weekNum())
+```
+
+## Install
+
+```sh
+npm install @github-craftwork/theweeknum
+```
+
+## Run tests
+
+```sh
+npm run test
+```
+
+## Author
+
+👤 **github-craftwork**
+
+* GitHub: [@github-craftwork](https://github.com/github-craftwork)
+
+## 🤝 Contributing
+
+Contributions, issues and feature requests are welcome!<br />Feel free to check [issues page](https://github.com/github-craftwork/theWeekNum/issues).
+
+## Show your support
+
+Give a ⭐️ if this project helped you!
+
+## 📝 License
+
+Copyright © 2019 [github-craftwork](https://github.com/github-craftwork).<br />
+This project is [MIT](https://github.com/bdougie/theWeekNum/blob/master/LICENSE) licensed.
+
+***
+_This README was generated with ❤️ by [readme-md-generator](https://github.com/kefranabg/readme-md-generator)_

index.js

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+function getWeekNumber(d) {
+// Copy date so don't modify original
+d = new Date(Date.UTC(d.getFullYear(), d.getMonth(), d.getDate()));
+// Set to nearest Thursday: current date + 4 - current day number
+// Make Sunday's day number 7
+d.setUTCDate(d.getUTCDate() + 4 - (d.getUTCDay()||7))
+// Get first day of year
+const yearStart = new Date(Date.UTC(d.getUTCFullYear(),0,1));
+// Calculate full weeks to nearest Thursday
+const weekNum = Math.ceil(( ( (d - yearStart) / 86400000) + 1)/7);
+// Return week number
+return weekNum;
+}
+
+module.exports = (date) => getWeekNumber(date || new Date());

index.test.js

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+const weekNum = require('./index.js');
+
+test('that weekNum returns a value', () => {
+  expect(weekNum).not.toBeNull();
+});