ES6Pakket

ES6Pakket is a boilerplate for writing ES6 Javascript libraries that run on both Node.js and ECMAScript 2015 (ES6) compliant browsers.

The build doesn't require a transpiler (like babel) or a builder (like browserify, webpack or rollup) to produce a module that runs in the browser from source files that use import and export statements. It is useful if you want to keep your source code quite pure.

ES6Pakket relies on Pakket to drastically reduces the amount of extra code added to your library (go to Pakket for details).

ES6Pakket relies on Mocha and Chai for unitary testing. It relies on Istanbul for code coverage.

ES6Pakket uses Github Actions for continuous integration and Coveralls.io to display test coverage.

Nota:
ES6Pakket is a fork of the boilerplate ES6Kadoo.

Quick Startup

You can easily get your first ES6Pakket library running in a couple of minutes by just typing a few command lines. But first, you need to create an empty folder. It will contain your library.

Then, you just need to create a package.json file that contains:

{
  "name": "NameOfYourProject",
  "scripts": {
    "create": "npm install @mobilabs/es6pakket && npm run populate",
    "populate": "es6pakket populate --name $npm_package_name --author $npm_package_config_name --acronym $npm_package_config_acronym --email $npm_package_config_email --url $npm_package_config_url && npm install && npm run build:dev && npm run test && npm run report"
  },
  "config": {
    "name": "John Doe",
    "acronym": "jdo",
    "email": "[email protected]",
    "url": "http://www.johndoe.com/"
  }
}

Replace NameOfYourProject by your project name and fill writer with your credentials.

And finally, type in the terminal:

npm run create.

That's almost all! When the script has been executed, your folder contains the following files:

Your project Folder
      |_ .github
      |     |_ workflows
      |           |_ ci.yml   // Github Workflow file (if you use it),
      |_ lib
      |   |_ lib.js           // Your built ES6 module,
      |_ src
      |   |_ ...              // The source files of your library,
      |   |_ ...
      |   |_ ...
      |_ tasks
      |   |_ ...              // The tasks to build your project,
      |_  test
      |     |_ main.js        // Your Mocha, Chai test file,
      |_ .eslintignore        // Files to be ignored by ESLint,
      |_ .eslintrc            // A Configuration file for the ESLint linter tool (if you use it),
      |_ .gitignore           // Files that Git must ignore (if you use git),
      |_ .travis.yml          // A configuration file for Travis CI (if you use it),
      |_ .CHANGELOG.md        // The changes between your different versions,
      |_ index.js             // The link to your ES5 library,
      |_ LICENSE.md           // The license that applies to your library (here MIT),
      |_ package-lock.json    // The NPM dependency tree,
      |_ package.json         // The NPM package file,
      |_ README.md            // Your README file,

This folder is now a NPM package.

How to build it

The file package.json contains the build instructions. These instructions populate the folder lib from the sources files included in the folder src.

package.json implements two operations for the build:

• the command npm run build:dev creates the library at the execution,
• and the command npm run watch updates the library when one of the source files is modified.

How to test it

Your package.json file contains three scripts to test your UMD library:

• npm run test,
• npm run check:coverage,
• npm run display:coverage.

npm run test executes the tests and computes the test coverage.

npm run check:coverage checks if the test coverage matches the requirements. Here 100%.

npm run display:coverage opens your browser and reports the test coverage.

How to create a distribution version

Your package.json file contains a script to build a distribution library:

• npm run build:prod

The script build:prod adds a license header to the library and creates a minified version.

How to use it

On Node.js, your project folder is viewed as a NPM package. Choose a working directory outside your project folder, create a folder node_modules and copy your project folder into node_modules. Then, on your terminal, type (at your working directory level):

node
> var mylib = require('mylib');
undefined
> mylib.getString();
'I am a string!'
> mylib.getArray();
[ '1', '2', '3' ]
>

On the browser, pick-up the JS file lib/mylib.js and add it as a script in your HTML file. mylib is an immediately-invoked function expression. It attaches the mylib variable to the current context.

<!DOCTYPE html>
<html>
  <body>
    <script src="mylib.js"></script>
    <script>
    	console.log(mylib.VERSION);
    </script>
  </body>
</html>

Or,

<!DOCTYPE html>
<html>
  <body>
    <script type="module">
      import mylib from './<path_to_the_lib>/mylib.mjs';

      console.log(mylib.VERSION);
    </script>
  </body>
</html>

Enjoy!

License

MIT.

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