.eslintrc

{
  "parser": "babel-eslint",
  "parserOptions": {
    "ecmaVersion": 8,
    "sourceType": "module",
    "ecmaFeatures": {
      "arrowFunctions": true,                     // enable arrow functions
      "modules": true,                            // enable modules
      "binaryLiterals": false,                    // enable binary literals
      "blockBindings": true,                      // enable let and const (aka block bindings)
      "classes": true,                            // enable classes
      "defaultParams": true,                      // enable default function parameters
      "destructuring": true,                      // enable destructuring
      "experimentalObjectRestSpread": true,
      "forOf": true,                              // enable for-of loops
      "generators": true,                         // enable generators
      "impliedStrict": true,
      "objectLiteralComputedProperties": true,    // enable computed object literal property names
      "objectLiteralDuplicateProperties": true,   // enable duplicate object literal properties in strict mode
      "objectLiteralShorthandMethods": true,      // enable object literal shorthand methods
      "objectLiteralShorthandProperties": true,   // enable object literal shorthand properties
      "octalLiterals": false,                     // enable octal literals
      "regexUFlag": true,                         // enable the regular expression u flag
      "regexYFlag": true,
      "restParams": true,                         // enable the regular expression y flag
      "spread": true,                             // enable the spread operator
      "superInFunctions": false,                  // enable super references inside of functions
      "templateStrings": true,                    // enable template strings
      "unicodeCodePointEscapes": true,            // enable code point escapes
      "globalReturn": false,                       // allow return statements in the global scope
      "jsx": false
    }
  },
  "rules": {
    "semi": 2
  },
  "env": {
    "browser": true,      // browser global variables.
    "node": true,         // Node.js global variables and Node.js-specific rules.
    "es6": true,
    "mocha": true
  },

  "globals": {
    "steal": true,
    "System": true,
    "Promise": true
  },
}