.eslintrc

env:
  node: true
  browser: true

# enable ECMAScript features
ecmaFeatures:
  arrowFunctions: true
  binaryLiterals: true
  blockBindings: true
  classes: true
  defaultParams: true
  destructuring: true
  forOf: true
  generators: true
  modules: true
  objectLiteralShorthandMethods: true
  objectLiteralShorthandProperties: true
  objectLiteralComputedProperties: true
  objectLiteralDuplicateProperties: true
  octalLiterals: true
  restParams: true
  spread: true
  templateStrings: true

rules:
  # Possible Errors
  # list: https://github.com/eslint/eslint/tree/master/docs/rules#possible-errors
  ## check debugger sentence
  no-debugger: 2
  ## check duplicate arguments
  no-dupe-args: 2
  ## check duplicate object keys
  no-dupe-keys: 2
  ## check duplicate switch-case
  no-duplicate-case: 2
  ## disallow assignment of exceptional params
  no-ex-assign: 2
  ## disallow unreachable code
  no-unreachable: 2
  ## require valid typeof compared string like typeof foo === 'strnig'
  valid-typeof: 2

  # Best Practices
  # list: https://github.com/eslint/eslint/tree/master/docs/rules#best-practices
  ## require falls through comment on switch-case
  no-fallthrough: 2

  ## 2 space indentation
  indent: [2, 2]
  ## add space after comma
  comma-spacing: 2
  ## put semi-colon
  semi: 2
  ## require spaces operator like var sum = 1 + 1;
  space-infix-ops: 2
  ## no space before function, eg. 'function()'
  space-before-function-paren: [2, "never"]
  ## require space before blocks, eg 'function() {'
  space-before-blocks: [2, "always"]
  ## require parens for Constructor
  new-parens: 2
  ## max 80 length
  max-len: [2, 120, 2]
  ## max 2 consecutive empty lines
  no-multiple-empty-lines: [2, {max: 2}]
  ## no trailing spaces
  no-trailing-spaces: 2
  # require space after keywords, eg 'for (..)'
  keyword-spacing: 2

  # Variables
  # list: https://github.com/eslint/eslint/tree/master/docs/rules#variables
  ## disallow use of undefined variables (globals)
  no-undef: 2



# Global scoped method and vars
globals:
  describe: true
  it: true
  before: true
  after: true
  beforeEach: true
  afterEach: true