eslint-config-jhh/rules/es6.js

JHH ESLint config

/**
 * These rules relate to ES6, also known as ES2015
 *
 * @see http://eslint.org/docs/rules/#ecmascript-6
 */

module.exports = {
    env: {
        es6: true
    },
    parserOptions: {
        ecmaVersion: 6,
        sourceType: 'module',
        ecmaFeatures: {
            generators: false
        }
    },
    rules: {
        // require braces around arrow function bodies
        'arrow-body-style': ['warn', 'as-needed', {
            requireReturnForObjectLiteral: false
        }],

        // require parentheses around arrow function arguments
        'arrow-parens': ['warn', 'as-needed', {
            requireForBlockBody: true
        }],

        // enforce consistent spacing before and after the arrow in arrow
        // functions
        'arrow-spacing': ['warn', {
            before: true,
            after: true
        }],

        // require super() calls in constructors
        'constructor-super': 'error',

        // enforce consistent spacing around * operators in generator functions
        'generator-star-spacing': ['warn', {
            before: false,
            after: true
        }],

        // disallow reassigning class members
        'no-class-assign': 'error',

        // disallow arrow functions where they could be confused with
        // comparisons
        'no-confusing-arrow': ['warn', {
            allowParens: true
        }],

        // disallow reassigning const variables
        // ... or else wtf does const mean?
        'no-const-assign': 'error',

        // disallow duplicate class members
        // Jesus...
        'no-dupe-class-members': 'error',

        // disallow duplicate module imports
        // Idiot proofing
        'no-duplicate-imports': 'error',

        // disallow new operators with the Symbol object
        'no-new-symbol': 'error',

        // disallow this/super before calling super() in constructors
        'no-this-before-super': 'error',

        // disallow unnecessary constructors
        'no-useless-constructor': 'warn',

        // disallow renaming import, export, and destructured assignments to
        // the same name
        // More idiot proofing
        'no-useless-rename': ['error', {
            ignoreImport: false,
            ignoreExport: false,
            ignoreDestructuring: false
        }],

        // require let or const instead of var
        'no-var': 'warn',

        // require or disallow method and property shorthand syntax for
        // object literals
        'object-shorthand': ['warn', 'consistent-as-needed'],

        // require arrow functions as callbacks
        'prefer-arrow-callback': ['warn', {
            allowNamedFunctions: false,
            allowUnboundThis: true
        }],

        // require const declarations for variables that are never reassigned
        // after declared
        'prefer-const': ['warn', {
            destructuring: 'any',
            ignoreReadBeforeAssign: true
        }],

        // disallow parseInt() in favor of binary, octal, and hexadecimal
        // literals
        'prefer-numeric-literals': 'warn',

        // require rest parameters instead of arguments
        'prefer-rest-params': 'error',

        // require spread operators instead of .apply()
        'prefer-spread': 'error',

        // require template literals instead of string concatenation
        'prefer-template': 'error',

        // require generator functions to contain yield
        'require-yield': 'error',

        // enforce spacing between rest and spread operators and their
        // expressions
        'rest-spread-spacing': ['error', 'never'],

        // enforce sorted import declarations within modules
        'sort-imports': ['off', {
            ignoreCase: false,
            ignoreMemberSort: false,
            memberSyntaxSortOrder: ['none', 'all', 'multiple', 'single']
        }],

        // require symbol descriptions
        'symbol-description': 'error',

        // require or disallow spacing around embedded expressions of
        // template strings
        'template-curly-spacing': ['error', 'never'],

        // require or disallow spacing around the * in yield* expressions
        'yield-star-spacing': ['error', 'after']
    }
}