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npm package example

This is a simple npm package example based on How to Write an Open Source JavaScript Library course from egghead.io

Configuring npm and creating a package.json

npm set init-author-name 'Your Name'
npm set init-author-email 'your.email@yourdomain.com'
npm set init-author-url 'yourdomain.com'
npm set init-license 'MIT'
npm set save-exact true

signup for npm account (if you don't have already): npmjs.com

npm adduser

npm init

Publishing to npm

npm publish

Releasing a version to GitHub

git tag 1.0.0
git push --tags

Semantic versioning and npm

Semantic versioning is a standard that a lot of projects use to communicate what kinds of changes are in this release. It's important to communicate what kinds of changes are in a release because sometimes those changes will break the code that depends on the package.

If a project is going to be shared with others, it should start at 1.0.0, though some projects on npm don't follow this rule.

After this, changes should be handled as follows:

• Bug fixes and other minor changes: Patch release, increment the last number, e.g. 1.0.1
• New features which don't break existing features: Minor release, increment the middle number, e.g. 1.1.0
• Changes which break backwards compatibility: Major release, increment the first number, e.g. 2.0.0

Releasing a new version to npm

Update version number in package.json file, commit your changes to github and add new tag and then run:

npm publish

Publishing a beta version

Update version number to for example: 1.1.0-beta.0, commit your changes to github and add new tag and then run:

npm publish --tag beta

To install this beta verion you can run:

npm install your-package-name@beta

Unit Testing with Mocha and Chai

Install mocha and chai:

npm i -D mocha chai

To package.json add:

"scripts": {
    "test": "mocha src/index.test.js"
  },

To run test:

npm run test

Automating Releases with semantic-release

npm install -g semantic-release-cli
semantic-release-cli setup

in .travis.yml add:

script:
  - npm run test

Writing conventional commits with commitizen

npm install -D commitizen cz-conventional-changelog

Add following lines to package.json:

"scripts": {
    "commit": "git-cz",

"czConfig": {
    "path": "node_modules/cz-conventional-changelog"
}

Now you can commit yourchanges using:

npm run commit

In "List any breaking changes or issues closed by this change:" step you can use:

closes #1

if your update closes any existing issue

Automatically running tests before commits with ghooks

npm i -D ghooks

Update package.json to include:

"config": {
    "ghooks": {
        "pre-commit": "npm run test"
    }
}

Adding code coverage recording with Istanbul

npm install -D istanbul

update package.json to include:

"scripts": {
    "test": "istanbul cover -x *.test.js ./node_modules/mocha/bin/_mocha -- -R spec src/index.test.js",

Adding code coverage checking

update package.json to include:

  "scripts": {
    "check-coverage": "istanbul check-coverage --statements 100 --branches 100 --functions 100 --lines 100",

and

  "config": {
    "ghooks": {
      "pre-commit": "npm run test && npm run check-coverage"

update .travis.yml to include:

script:
  - npm run test
  - npm run check-coverage

Add code coverage reporting

signup for codecov.io account (if you don't have already)

npm install -D codecov.io

update package.json to include:

 "scripts": {
    "report-coverage": "cat ./coverage/lcov.info | codecov",

update .travis.yml to include:

after_success:
  - npm run report-coverage

Adding badges to your README

You can go to shields.io and use their banges for example to create something like this:

use this code:

[![travis build](https://img.shields.io/travis/creativedeveloper-net/npm-package-example.svg?style=flat-square)](https://travis-ci.org/creativedeveloper-net/npm-package-example)
[![codecov coverage](https://img.shields.io/codecov/c/github/creativedeveloper-net/npm-package-example.svg?style=flat-square)](https://codecov.io/github/creativedeveloper-net/npm-package-example)
[![version](https://img.shields.io/npm/v/npm-package-example.svg?style=flat-square)](http://npm.im/npm-package-example)
[![downloads](https://img.shields.io/npm/dm/npm-package-example.svg?style=flat-square)](http://npm-stat.com/charts.html?package=npm-package-example&from=2015-08-01)
[![MIT License](https://img.shields.io/npm/l/npm-package-example.svg?style=flat-square)](http://opensource.org/licenses/MIT)

Adding ES6 Support

npm i -D babel-cli
npm i -D rimraf
npm i -D babel-preset-es2015 babel-preset-stage-2

update package.json to include:

 "scripts": {
    "prebuild": "rimraf dist",
    "build": "babel --copy-files --out-dir dist --ignore *.test.js src",

and

  "babel": {
    "presets": ["es2015", "stage-2"]
  }

and also update "main" section to use dist folder instead of src:

"main": "dist/index.js",

update .travis.yml to include:

script:
  - npm run test
  - npm run check-coverage
  - npm run build

add "files" section to package.json to include only necessary files:

  "files": [
    "dist",
    "README.md"
  ],

Adding ES6 Support to Tests using Mocha and Babel

npm i -D nyc

update package.json "script" section:

"check-coverage": "nyc check-coverage --statements 100 --branches 100 --functions 100 --lines 100",
 "report-coverage": "cat ./coverage/lcov.info | codecov",
 "watch:test": "npm t -- --watch",
 "test": "mocha src/index.test.js --compilers js:babel-core/register",
 "cover": "nyc npm t",

and "ghooks" section:

    "ghooks": {
      "pre-commit": "npm run cover && npm run check-coverage"
    },

update .travis.yml "script" section:

script:
  - npm run cover
  - npm run check-coverage
  - npm run build

Limit Built Branches on Travis

update .travis.yml to include:

branches:
  only:
    - master

Add a browser build to an npm module

npm i -D webpack

Add new file C:\Users\sciurkat\Desktop\My files\webpack.config.babel.js with this code:

import {join} from 'path'

const include = join(__dirname, 'src')

export default {
  entry: './src/index',
  output: {
    path: join(__dirname, 'dist'),
    libraryTarget: 'umd',
    library: 'npmPackageExample',
  },
  devtool: 'source-map',
  module: {
    loaders: [
      {test: /\.js$/, loader: 'babel', include},
      {test: /\.json$/, 'loader': 'json', include},
    ]
  }
}

install

npm i -D babel-loader json-loader
npm install npm-run-all --save-dev

update package.json "script" section:

    "build": "npm-run-all --parallel build:*",
    "build:main": "babel --copy-files --out-dir dist --ignore *.test.js src",
    "build:umd": "webpack --output-filename index.umd.js",
    "build:umd.min": "webpack --output-filename index.umd.min.js -p",

You can now access your package via url like this: https://unpkg.com/npm-package-example/dist/index.umd.js

Integrating SonarQube

https://docs.travis-ci.com/user/sonarqube/

generate token for sonarqube: https://sonarqube.com/account/security/

encrypt that token here: https://travis-encrypt.github.io/

update .travis.yml to inlcude:

script:
  - npm run cover
  - npm run check-coverage
  - npm run build
  - sonar-scanner -Dsonar.login=$SONAR_TOKEN -X

add sonar-project.properties file with code like this (update your projectKey and projectName):

sonar.projectKey=creativedeveloper.net:npm-package-example
sonar.projectName=creativedeveloper.net::npm-package-example
sonar.projectVersion=1.0
sonar.language=js
sonar.sources=src/index.js
sonar.sourceEncoding=UTF-8
sonar.tests=src/index.test.js
sonar.javascript.lcov.reportPath=coverage/lcov.info

Add jshint

install jshint

npm install jshint -g

update package.json:

  "scripts": {
    "check-jshint": "jshint src/index.js",

and:

  "config": {
    "ghooks": {
      "pre-commit": "npm run cover && npm run check-coverage && npm run check-jshint"
    }
  },