pleaserc/.eslintrc

Linting configuration for ESLint

{
  "rules": {
    // It's nbd if commas are dangling or not
    "comma-dangle": "off",
    // if (x = 2) is usually an error
    "no-cond-assign": "error",
    "no-console": "off",
    // if (false) is usually an error
    "no-constant-condition": "error",
    "no-control-regex": "error",
    "no-debugger": "off",
    "no-dupe-args": "error",
    "no-dupe-keys": "error",
    // Prevents duplicates in switch statements
    "no-duplicate-case": "error",
    // Leave a comment if an error block is intentionally empty
    "no-empty": "error",
    "no-empty-character-class": "error",
    "no-ex-assign": "error",
    "no-extra-boolean-cast": "error",
    "no-extra-parens": ["error", "functions"],
    "no-extra-semi": "error",
    "no-func-assign": "error",
    "no-inner-declarations": "error",
    "no-invalid-regexp": "error",
    "no-irregular-whitespace": "error",
    "no-negated-in-lhs": "error",
    "no-obj-calls": "error",
    "no-regex-spaces": "error",
    "no-sparse-arrays": "error",
    "no-template-curly-in-string": "error",
    "no-unexpected-multiline": "error",
    "no-unreachable": "error",
    "no-unsafe-negation": "error",
    "use-isnan": "error",
    "valid-jsdoc": "error",
    "valid-typeof": "error",

    "accessor-pairs": "error",
    "array-callback-return": "error",
    "block-scoped-var": "error",
    "class-methods-use-this": "off",
    "complexity": "off",
    "consistent-return": "off",
    "curly": "error",
    "default-case": "off",
    "dot-location": ["error", "property"],
    "dot-notation": "error",
    "eqeqeq": "error",
    // This is rarely (never?) something you need to do
    "guard-for-in": "off",
    "no-alert": "error",
    "no-caller": "error",
    "no-case-declarations": "error",
    "no-div-regex": "error",
    // I just don't feel too strongly about this
    "no-else-return": "off",
    "no-empty-function": "error",
    "no-empty-pattern": "error",
    "no-eq-null": "error",
    "no-eval": "error",
    "no-extend-native": "error",
    "no-extra-bind": "error",
    "no-extra-label": "error",
    // Be explicit with a `"falls through"` comment
    "no-fallthrough": "off",
    "no-floating-decimal": "error",
    "no-implicit-coercion": "error",
    "no-implicit-globals": "error",
    "no-implied-eval": "error",
    "no-invalid-this": "off",
    "no-iterator": "error",
    "no-labels": "error",
    "no-lone-blocks": "error",
    "no-loop-func": "error",
    // Not enforced, but do leave comments if necessary
    "no-magic-numbers": "off",
    "no-multi-spaces": "error",
    "no-multi-str": "error",
    "no-global-assign": "error",
    "no-new": "error",
    "no-new-func": "error",
    "no-new-wrappers": "error",
    "no-octal": "error",
    "no-octal-escape": "error",
    // More useful in library code than application code
    "no-param-reassign": "off",
    "no-proto": "error",
    "no-redeclare": "error",
    "no-return-assign": "error",
    "no-script-url": "error",
    "no-self-assign": "error",
    "no-self-compare": "error",
    "no-sequences": "error",
    "no-throw-literal": "error",
    "no-unmodified-loop-condition": "error",
    "no-unused-expressions": "error",
    "no-unused-labels": "error",
    "no-useless-call": "error",
    "no-useless-concat": "error",
    "no-useless-escape": "error",
    "no-void": "error",
    // Todo's in code are easy to forget about – use an issue tracker!
    "no-warning-comments": "error",
    "no-with": "error",
    // Modern browsers don't require this
    "radix": "off",
    // Define variables near to where they're used. Or just use `let`
    "vars-on-top": "off",
    "wrap-iife": ["error", "any"],
    // Few developers use Yoda conditionals in my experience
    "yoda": "error",

    // I don't think any developer cares about this
    "init-declarations": "off",
    "no-catch-shadow": "error",
    "no-delete-var": "error",
    // I don't use labels, so this doesn't really affect me
    "no-label-var": "off",
    "no-restricted-globals": "off",
    // Just don't go overboard
    "no-shadow": "off",
    "no-shadow-restricted-names": "error",
    "no-undef": "error",
    "no-undef-init": "error",
    "no-undefined": "off",
    "no-unused-vars": ["error", { "vars": "all", "args": "after-used" }],
    "no-use-before-define": "error",

    // Sometimes it's convenient to not use braces
    "arrow-body-style": "off",
    // I should probably be more opinionated about this, but I'm not
    "arrow-parens": "off",
    "arrow-spacing": "error",
    "constructor-super": "error",
    "generator-star-spacing": "error",
    "no-class-assign": "error",
    "no-confusing-arrow": "error",
    "no-const-assign": "error",
    "no-dupe-class-members": "error",
    "no-duplicate-imports": "error",
    "no-new-symbol": "error",
    "no-restricted-imports": "off",
    "no-this-before-super": "error",
    "no-useless-constructor": "error",
    // `let` and `const` generally do what you want, but it's nbd
    "no-var": "off",
    "object-shorthand": "error",
    "prefer-arrow-callback": "error",
    // Shrug. Use `const` if you remember, but forgetting won't break the build
    "prefer-const": "off",
    "prefer-reflect": "off",
    "prefer-rest-params": "off",
    "prefer-spread": "error",
    "prefer-template": "error",
    "require-yield": "error",
    "template-curly-spacing": ["error", "never"],
    "sort-imports": "off",
    "symbol-description": "error",
    "yield-star-spacing": "error",

    "strict": ["error", "never"],

    "array-bracket-spacing": "error",
    "block-spacing": "off",
    // I'd prefer to enforce this, but ESLint v2 doesn't support my preference
    "brace-style": "off",
    // This is only off because of destructuring API responses. It should
    // generally be adhered to, though.
    "camelcase": "off",
    "comma-spacing": "error",
    "comma-style": "error",
    "computed-property-spacing": "error",
    "consistent-this": ["error", "self"],
    "eol-last": "error",
    "func-names": "off",
    "func-style": "off",
    "id-blacklist": "off",
    "id-length": "off",
    "id-match": "off",
    "indent": ["error", 2, { "SwitchCase": 1 }],
    "jsx-quotes": "error",
    "key-spacing": "error",
    "keyword-spacing": "error",
    "linebreak-style": "error",
    "lines-around-comment": "error",
    "max-depth": "error",
    "max-len": ["error", 130],
    "max-nested-callbacks": ["error", 3],
    "max-params": ["error", 5],
    "max-statements": "off",
    "max-statements-per-line": "off",
    // I'd like to enforce this, but 3rd party libs can be terrible sometimes
    "new-cap": "off",
    "new-parens": "error",
    "newline-after-var": "off",
    "newline-before-return": "off",
    "newline-per-chained-call": "error",
    "no-array-constructor": "error",
    // Just don't do regrettable things with them
    "no-bitwise": "off",
    "no-continue": "off",
    "no-inline-comments": "error",
    "no-lonely-if": "error",
    "no-mixed-spaces-and-tabs": "error",
    "no-multiple-empty-lines": "error",
    "no-negated-condition": "off",
    "no-nested-ternary": "error",
    "no-new-object": "error",
    "no-plusplus": "off",
    "no-restricted-syntax": "off",
    "func-call-spacing": "error",
    "no-ternary": "off",
    "no-trailing-spaces": "error",
    "no-underscore-dangle": "off",
    "no-unneeded-ternary": "error",
    "no-whitespace-before-property": "error",
    "object-curly-spacing": "error",
    "object-property-newline": "off",
    // One var per line, unless they're uninitialized
    "one-var": "off",
    // Try to keep em on the same line. But if you declare many, you can add newlines.
    "one-var-declaration-per-line": "off",
    "operator-assignment": "off",
    "operator-linebreak": "error",
    "padded-blocks": ["error", "never"],
    "quote-props": ["error", "as-needed"],
    "quotes": ["error", "single", {"avoidEscape": true, "allowTemplateLiterals": true}],
    "require-jsdoc": "off",
    "semi": "error",
    "semi-spacing": "error",
    "sort-keys": "off",
    "sort-vars": "off",
    "space-before-blocks": "error",
    "space-before-function-paren": ["error", "never"],
    "space-in-parens": "error",
    "space-infix-ops": ["error", {"int32Hint": false}],
    "space-unary-ops": "error",
    "spaced-comment": "error",
    "unicode-bom": "error",
    "wrap-regex": "off"
  },
  "env": {
    "browser": true,
    "node": true
  }
}