eslint codestyle config

.eslintrc.js

module.exports = {
  // enable parsing ES5 code
  /*
  "parserOptions": {
    "ecmaVersion": 5,
  },
  */
  
  "parser": "babel-eslint", // needed to properly parse ES7 features, e.g. 'static' declarations

  "extends": "airbnb",

  // put variables that are global. `false` means they cannot be changed, `true` means they can change
  "globals": {
    "jest": false
  },

  "plugins": [
    "react",
    "jsx-a11y",
    "import"
  ],

  "env": {
    "browser": true,
    "mocha": true,
    "jasmine": true
  },

  "rules": {
    "comma-dangle": 2,  // comma after last element in arrays/objects
    "global-require": 0,
    "no-unused-vars": 1,
    "no-shadow": 1,
    "max-len": ["error", 120],
    "semi": 2, // semicolons after each instruction, even `return`
    "import/prefer-default-export": 0,
    "import/extensions": 1, // nexpected use of file extension "js" for ...
    "react/jsx-filename-extension": [2, { "extensions": [".js", ".jsx"] }],
    "react/prefer-stateless-function": 1, // Component should be written as a pure function
  },
};

package.json

{
  "devDependencies": {
    "eslint": "^3.18.0",
    "eslint-config-airbnb": "^14.1.0",
    "eslint-plugin-import": "^2.2.0",
    "eslint-plugin-jsx-a11y": "^4.0.0",
    "eslint-plugin-react": "^6.10.3"
  }
}