js-bigchaindb-driver/.eslintrc.js

module.exports = {
  extends: 'airbnb-base',
  parser: '@babel/eslint-parser',
  parserOptions: { requireConfigFile: false },
  env: {
    browser: true,
    node: true,
  },
  settings: {
    'import/ignore': ['node_modules', '.(scss|css)$', '.(jpe?g|png|gif|svg)'],
  },
  rules: {
    /**
     * Possible Errors
     * http://eslint.org/docs/rus/#possible-errors
     */

    // Allow dangling commas for multiline arrays and objects
    // http://eslint.org/docs/rules/comma-dangle
    'comma-dangle': [1, 'only-multiline'],

    // Warn against use of console for non-error logging
    // http://eslint.org/docs/rules/no-console
    'no-console': [1, { allow: ['error'] }],

    // Allow use of Object.prototypes builtins directly
    // http://eslint.org/docs/rules/no-prototype-builtins
    'no-prototype-builtins': [0],

    /**
     * Best Practices
     * http://eslint.org/docs/rules/#best-practices
     */

    // Allow else clauses after an if with a return
    // http://eslint.org/docs/rules/no-else-return
    'no-else-return': [0],

    // Disallow reassignment of function parameters (but allow assigning to parameter's properties)
    // http://eslint.org/docs/rules/no-param-reassign.html
    'no-param-reassign': [2, { props: false }],

    /**
     * Variables
     * http://eslint.org/docs/rules/#variables
     */

    // Disallow use of variables and classes before they are defined
    // http://eslint.org/docs/rules/no-use-before-define
    'no-use-before-define': [2, { functions: false, classes: true }],

    // Disallow declaration of variables that are not used in the code, unless they are prefixed by
    // `ignored` (useful for creating subset objects through destructuring and rest objects)
    // http://eslint.org/docs/rules/no-unused-vars
    'no-unused-vars': [
      2,
      {
        vars: 'local',
        args: 'after-used',
        varsIgnorePattern: 'ignored.+',
      },
    ],

    /**
     * Stylelistic Issues
     * (http://eslint.org/docs/rules/#stylistic-issues)
     */

    // Enforce 4-space indents, except for switch cases
    // http://eslint.org/docs/rules/indent
    indent: [2, 4, { SwitchCase: 1, VariableDeclarator: 1 }],

    // Specify the maximum length of a code line to be 100
    // http://eslint.org/docs/rules/max-len
    'max-len': [
      2,
      {
        code: 105, // Use 105 to give some leeway for *just* slightly longer lines when convienient
        ignorePattern: '^(import|export) .* from .*$',
        ignoreComments: false,
        ignoreTrailingComments: true,
        ignoreUrls: true,
      },
    ],

    // Require capitalization when using `new`, but don't require capitalized functions to be called
    // with new
    // http://eslint.org/docs/rules/new-cap
    'new-cap': [2, { newIsCap: true, capIsNew: false }],

    // Allow the continue statement
    // http://eslint.org/docs/rules/no-continue
    'no-continue': [0],

    // Disallow un-paren'd mixes of different operators if they're not of the same precendence
    // http://eslint.org/docs/rules/no-mixed-operators
    'no-mixed-operators': [
      2,
      {
        groups: [
          ['+', '-', '*', '/', '%', '**'],
          ['&', '|', '^', '~', '<<', '>>', '>>>'],
          ['==', '!=', '===', '!==', '>', '>=', '<', '<='],
          ['&&', '||'],
          ['in', 'instanceof'],
        ],
        allowSamePrecedence: true,
      },
    ],

    // Allow use of unary increment/decrement operators
    // http://eslint.org/docs/rules/no-plusplus
    'no-plusplus': [0],

    // Always allow dangling underscores
    // http://eslint.org/docs/rules/no-underscore-dangle
    'no-underscore-dangle': [0],

    // Require unix-style line breaks
    // http://eslint.org/docs/rules/linebreak-style
    'linebreak-style': [2, 'unix'],

    // Require operators to always be at the end of a line, except for the ternary operator
    // http://eslint.org/docs/rules/operator-linebreak
    'operator-linebreak': [
      2,
      'after',
      { overrides: { '?': 'ignore', ':': 'ignore' } },
    ],

    // Require properties to be consistently quoted. Force numbers to be quoted, as they can have
    // weird behaviour during the coercion into a string)
    // http://eslint.org/docs/rules/quote-props
    'quote-props': [
      2,
      'consistent',
      { keywords: false, unnecessary: true, numbers: true },
    ],

    // Require spaces before parens for anonymous function declarations
    // http://eslint.org/docs/rules/space-before-function-paren
    'space-before-function-paren': [2, { anonymous: 'always', named: 'never' }],

    // Require a space immediately following the // or /* in a comment for most comments
    // http://eslint.org/docs/rules/spaced-comment
    'spaced-comment': [
      2,
      'always',
      {
        line: {
          exceptions: ['-', '+'],
        },
        block: {
          exceptions: ['*'],
        },
      },
    ],

    // We don't like semicolons so kill them
    // http://eslint.org/docs/rules/semi
    semi: [2, 'never'],

    /**
     * Import rules
     * https://github.com/benmosher/eslint-plugin-import#rules
     */

    // Ensure named imports coupled with named exports
    // https://github.com/benmosher/eslint-plugin-import/blob/master/docs/rules/named.md#when-not-to-use-it
    'import/named': 2,

    // Ensure default import coupled with default export
    // https://github.com/benmosher/eslint-plugin-import/blob/master/docs/rules/default.md#when-not-to-use-it
    'import/default': 2,

    // Disallow namespace (wildcard) imports
    // https://github.com/benmosher/eslint-plugin-import/blob/master/docs/rules/no-namespace.md
    'import/no-namespace': 2,

    // Enforce imports to not specify a trailing .js extension
    // https://github.com/benmosher/eslint-plugin-import/blob/master/docs/rules/extensions.md
    'import/extensions': [2, { js: 'never' }],

    // Enforce module import order: builtin -> external -> internal
    // https://github.com/benmosher/eslint-plugin-import/blob/master/docs/rules/order.md
    'import/order': [
      2,
      {
        groups: [
          'builtin',
          'external',
          ['internal', 'parent', 'sibling', 'index'],
        ],
      },
    ],

    /**
     * ES6-specific Issues
     * (http://eslint.org/docs/rules/#ecmascript-6)
     */
    // Don't require parens in arrow function arguments
    // http://eslint.org/docs/rules/arrow-parens
    'arrow-parens': [0],

    // Ignore built-in import sorting for eslint-plugin-import's version
    // http://eslint.org/docs/rules/sort-imports
    'sort-imports': [0],
    'arrow-body-style': [0],
    'arrow-parens': [0],
    'arrow-spacing': [0],
    'constructor-super': [0],
    'generator-star-spacing': [0],
    'no-class-assign': [0],
    'no-confusing-arrow': [0],
    'no-const-assign': [0],
    'no-dupe-class-members': [0],
    'no-duplicate-imports': [0],
    'no-new-symbol': [0],
    'no-restricted-imports': [0],
    'no-this-before-super': [0],
    'no-useless-computed-key': [0],
    'no-useless-constructor': [0],
    'no-useless-rename': [0],
    'no-var': [0],
    'object-shorthand': [0],
    'prefer-arrow-callback': [0],
    'prefer-const': [0],
    'prefer-reflect': [0],
    'prefer-rest-params': [0],
    'prefer-spread': [0],
    'prefer-template': [0],
    'require-yield': [0],
    'rest-spread-spacing': [0],
    'sort-imports': [0],
    'template-curly-spacing': [0],
    'yield-star-spacing': [0],
  },
};