.eslintrc

{ 
  "extends": ["eslint:recommended"],

  "env": {
    "node": true,
    "browser": true,
    "es6": true,
    "jasmine": true
  },

  "globals": {
    "Modernizr": true,
    "Uint8Array": true,
    "ga": true
  },

  "parser": "babel-eslint",
  
  "parserOptions": {
    "ecmaVersion": 6,
    "ecmaFeatures": {}
  },

  "rules": { 
    "max-params": [1, 4],
    "no-inner-declarations": 0,
    // 2 --> error
    "no-shadow-restricted-names": 2, // disallow shadowing of names such as arguments
    "no-shadow": 2, // disallow declaration of variables already declared in the outer scope
    "eol-last": 2, // last line should have an end-of-line character so that you can easily use linux commands with them (cat etc.)
    "key-spacing": 2, // there should be no space before colon and a space after one.  e.g. {a: 5}.  Not {a:5} or {a :5}
    "semi-spacing": 2, // must have no space before a ; but must have one after (if not eol)
    "space-infix-ops": 2, // infix operators should be spaced.  e.g.: a + b rather than a+b
    "space-unary-ops": 2, // e.g. typeof 5.  rather than typeof5
    "keyword-spacing": 2,  // there should be a space after & before keywords.  e.g. no return5; should be return 5;
    "comma-spacing": 2, // space after a comma
    "indent": [2, 4], // indent is 2 spaces (softtab)
    "no-unused-expressions": 1, // no unused expressions.  aka one that is evaluated to a value but never used;
    "semi": 1, // every statement should end with ;
    "comma-dangle": 2, // No dangling comma at the end of last element in arrays or objects
    "new-cap": 1, // require constructor function names to begin with a capital letter
    "curly": [2, "all"], // never omit curly braces around blocks (even single line blocks)
    "dot-notation": [2, { "allowKeywords": true }], // enforce dot notation whenever possible
    "eqeqeq": 2, // use === and !== instead of == and !=
    "no-else-return": 2, // Else is never required if if block ends with return statement, so just omit it
    "no-eval": 2, // don't use eval() function
    "space-before-blocks": 2, //There should be a space before curly brackets. e.g. no function(){}, shoule be function() {}
    "no-extend-native": 2, // disallow extending native types
    "no-extra-bind": 2, // disallow unnecessary calls to .bind()
    "no-floating-decimal": 2, // no leading or trailing decimal point in numeric literals like .2, 5., -.7 Use 0.2, 5.0, -0.7 etc
    "no-implied-eval": 2, // disallow the use of eval()-like methods
    "no-lone-blocks": 2, // disallow unnecessary nested blocks
    "no-loop-func": 2, // disallow function declarations and expressions inside loop statements
    "no-multi-str": 2, // don't allow multiple spaces where no needed like var a  = b;
    "no-new": 2, // no new operators outside of assignments or comparisons
    "no-new-func": 0, // disallow new operators with the Function object
    "no-new-wrappers": 2, // disallow new operators with the String, Number, and Boolean objects
    "no-octal-escape": 2, // disallow octal escape sequences in string literals
    "no-proto": 2, // disallow the use of the __proto__ property
    "no-return-assign": 2, // disallow assignment operators in return statements
    "no-script-url": 2, // disallow javascript: urls
    "no-self-compare": 2, //disallow comparisons where both sides are exactly the same
    "no-sequences": 2, // disallow comma operators
    "no-throw-literal": 2, // disallow throwing literals as exceptions
    "no-with": 2, // disallow with statements
    "radix": 0, // enforce the consistent use of the radix argument when using parseInt()
    "vars-on-top": 2, // require var declarations be placed at the top of their containing scope
    "wrap-iife": 2, // require parentheses around immediate function invocations
    "yoda": 0, // don't allow comparisons like 5 === count. Use count === 5 instead.
    "quotes": [1, "single", {"avoidEscape": true}], // enforce single quotes for strings. allow double quotes to avoid escaping single quotes like "say 'hello world'"
    "no-extra-parens": 2, // don't allow unnecessary parenthesis. It causes confusion
    "no-multiple-empty-lines": [2, {"max": 2, "maxEOF": 1, "maxBOF": 1 }], // Don't allow unnecessary multiple empty lines
    "no-var": 2, // don't use var, use const or let instead
    "array-callback-return": 2, // Enforces return statements in callbacks of array’s methods 
    "dot-location": [2, "property"], // use consistent dot location before property name when breaking property chain in multiline
    "no-useless-call": 2, // disallow unnecessary calls to .call() and .apply()
    "array-bracket-spacing": 2, // disallows spaces inside array brackets like [2, 3]
    "brace-style": [2, "1tbs", {"allowSingleLine": false}], // enforce one true brace style even for single line blocks
    "comma-style": 2, // Place commas at the EOL in arrays etc while breaking in multiline
    "max-depth": 2, // enforce a maximum depth of 4 in nested code blocks
    "no-nested-ternary": 2, // disallow nested ternary expressions
    "prefer-arrow-callback": 2, // Suggest using arrow functions as callbacks
    "prefer-const": 2, // Suggest using const for variables which are declared using let but never reassigned
    "object-curly-spacing": 2, // don't allow extra spaces in object curly braces. {a: 5 } should be {a: 5}
    "max-len": [0, 120, {"ignoreComments": true, "ignoreUrls": true, "ignorePattern": "^import"}], // max length of a line should not exceed 120 chars excepts for comments, urls and import statements.
    "camelcase": 2, // naming should be in camelCase. No snake_case
    "no-console": 1,
    "no-case-declarations": 0,
    "no-fallthrough": 1,
    "no-unused-vars": 2
 }
}