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.eslintrc
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.eslintrc
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// Adapted from React Native .eslintrc.
// However, at this time, some rules have been disabled to ease the transition
{
"parser": "babel-eslint",
"plugins": [
"flowtype",
"header",
"flow-header",
"prettier"
],
"env": {
"es6": true,
"jasmine": true,
},
"globals": {
"console": false,
"process": false,
"require": false,
"setTimeout": false,
"setInterval": false,
"clearTimeout": false,
"clearInterval": false,
"__dirname": false,
"Set": false,
"gc": false
},
"rules": {
"comma-dangle": 0, // disallow trailing commas in object literals
"no-cond-assign": 2, // disallow assignment in conditional expressions
"no-console": 0, // disallow use of console (off by default in the node environment)
"no-const-assign": 2, // disallow assignment to const-declared variables
"no-constant-condition": 0, // disallow use of constant expressions in conditions
"no-control-regex": 2, // disallow control characters in regular expressions
"no-debugger": 2, // disallow use of debugger
"no-dupe-keys": 2, // disallow duplicate keys when creating object literals
"no-empty": 0, // disallow empty statements
"no-ex-assign": 2, // disallow assigning to the exception in a catch block
"no-extra-boolean-cast": 2, // disallow double-negation boolean casts in a boolean context
"no-extra-parens": 0, // disallow unnecessary parentheses (off by default)
"no-extra-semi": 2, // disallow unnecessary semicolons
"no-func-assign": 2, // disallow overwriting functions written as function declarations
"no-inner-declarations": 0, // disallow function or variable declarations in nested blocks
"no-invalid-regexp": 2, // disallow invalid regular expression strings in the RegExp constructor
"no-negated-in-lhs": 2, // disallow negation of the left operand of an in expression
"no-obj-calls": 2, // disallow the use of object properties of the global object (Math and JSON) as functions
"no-regex-spaces": 2, // disallow multiple spaces in a regular expression literal
"no-reserved-keys": 0, // disallow reserved words being used as object literal keys (off by default)
"no-sparse-arrays": 2, // disallow sparse arrays
// "no-unreachable": 1, // disallow unreachable statements after a return, throw, continue, or break statement
"use-isnan": 2, // disallow comparisons with the value NaN
"valid-jsdoc": 0, // Ensure JSDoc comments are valid (off by default)
"valid-typeof": 2, // Ensure that the results of typeof are compared against a valid string
"no-var": 2,
// Best Practices
// These are rules designed to prevent you from making mistakes. They either prescribe a better way of doing something or help you avoid footguns.
"block-scoped-var": 0, // treat var statements as if they were block scoped (off by default)
"complexity": 0, // specify the maximum cyclomatic complexity allowed in a program (off by default)
"consistent-return": 0, // require return statements to either always or never specify values
// "curly": 1, // specify curly brace conventions for all control statements
"default-case": 2, // require default case in switch statements (off by default)
"dot-notation": 2, // encourages use of dot notation whenever possible
"eqeqeq": [2, "allow-null"], // require the use of === and !==
"guard-for-in": 0, // make sure for-in loops have an if statement (off by default)
"no-alert": 2, // disallow the use of alert, confirm, and prompt
"no-caller": 2, // disallow use of arguments.caller or arguments.callee
"no-div-regex": 2, // disallow division operators explicitly at beginning of regular expression (off by default)
"no-else-return": 0, // disallow else after a return in an if (off by default)
"no-eq-null": 0, // disallow comparisons to null without a type-checking operator (off by default)
"no-eval": 2, // disallow use of eval()
"no-extend-native": 2, // disallow adding to native types
"no-extra-bind": 2, // disallow unnecessary function binding
"no-fallthrough": 2, // disallow fallthrough of case statements
"no-floating-decimal": 2, // disallow the use of leading or trailing decimal points in numeric literals (off by default)
"no-implicit-globals": 2,
"no-implied-eval": 2, // disallow use of eval()-like methods
"no-invalid-this": 2,
"no-labels": 0, // disallow use of labeled statements
"no-iterator": 2, // disallow usage of __iterator__ property
"no-lone-blocks": 2, // disallow unnecessary nested blocks
"no-loop-func": 0, // disallow creation of functions within loops
"no-multi-str": 0, // disallow use of multiline strings
"no-native-reassign": 0, // disallow reassignments of native objects
"no-new": 2, // disallow use of new operator when not part of the assignment or comparison
"no-new-func": 2, // disallow use of new operator for Function object
"no-new-wrappers": 2, // disallows creating new instances of String,Number, and Boolean
"no-octal": 2, // disallow use of octal literals
"no-octal-escape": 2, // disallow use of octal escape sequences in string literals, such as var foo = "Copyright \251";
"no-proto": 2, // disallow usage of __proto__ property
"no-redeclare": 2, // disallow declaring the same variable more then once
"no-return-assign": 2, // disallow use of assignment in return statement
"no-script-url": 2, // disallow use of javascript: urls.
"no-self-assign": 2,
"no-self-compare": 2, // disallow comparisons where both sides are exactly the same (off by default)
"no-sequences": 2, // disallow use of comma operator
"no-throw-literal": 2,
"no-unused-expressions": 0, // disallow usage of expressions in statement position
"no-void": 2, // disallow use of void operator (off by default)
"no-warning-comments": 0, // disallow usage of configurable warning terms in comments": 1, // e.g. TODO or FIXME (off by default)
"no-with": 2, // disallow use of the with statement
"radix": 2, // require use of the second argument for parseInt() (off by default)
"semi-spacing": 2, // require a space after a semi-colon
"vars-on-top": 0, // requires to declare all vars on top of their containing scope (off by default)
"wrap-iife": 0, // require immediate function invocation to be wrapped in parentheses (off by default)
"yoda": 2, // require or disallow Yoda conditions
// Variables
// These rules have to do with variable declarations.
"no-catch-shadow": 2, // disallow the catch clause parameter name being the same as a variable in the outer scope (off by default in the node environment)
"no-delete-var": 2, // disallow deletion of variables
"no-label-var": 2, // disallow labels that share a name with a variable
"no-shadow": 2, // disallow declaration of variables already declared in the outer scope
"no-shadow-restricted-names": 2, // disallow shadowing of names such as arguments
"no-undef": 2, // disallow use of undeclared variables unless mentioned in a /*global */ block
"no-undefined": 0, // disallow use of undefined variable (off by default)
"no-undef-init": 2, // disallow use of undefined when initializing variables
"no-unused-vars": [2, {"vars": "all", "args": "none"}], // disallow declaration of variables that are not used in the code
"no-use-before-define": 0, // disallow use of variables before they are defined
// Node.js
// These rules are specific to JavaScript running on Node.js.
"handle-callback-err": 2, // enforces error handling in callbacks (off by default) (on by default in the node environment)
"no-mixed-requires": 2, // disallow mixing regular variable and require declarations (off by default) (on by default in the node environment)
"no-new-require": 2, // disallow use of new operator with the require function (off by default) (on by default in the node environment)
"no-path-concat": 2, // disallow string concatenation with __dirname and __filename (off by default) (on by default in the node environment)
"no-process-exit": 0, // disallow process.exit() (on by default in the node environment)
"no-restricted-modules": 2, // restrict usage of specified node modules (off by default)
"no-sync": 0, // disallow use of synchronous methods (off by default)
// Stylistic Issues
// These rules are purely matters of style and are quite subjective.
"key-spacing": 2,
"keyword-spacing": 2, // enforce spacing before and after keywords
"jsx-quotes": [2, "prefer-double"],
"comma-spacing": 2,
"comma-style": 2,
"no-multi-spaces": 0,
"brace-style": 2, // enforce one true brace style (off by default)
"camelcase": 0, // require camel case names
"consistent-this": [0, "self"], // enforces consistent naming when capturing the current execution context (off by default)
"eol-last": 2, // enforce newline at the end of file, with no multiple empty lines
"func-names": 0, // require function expressions to have a name (off by default)
"func-name-matching": 2,
"func-call-spacing": 2,
"func-style": 0, // enforces use of function declarations or expressions (off by default)
"new-cap": [2, { "capIsNew": false }], // require a capital letter for constructors
"new-parens": 2, // disallow the omission of parentheses when invoking a constructor with no arguments
"no-nested-ternary": 0, // disallow nested ternary expressions (off by default)
"no-array-constructor": 2, // disallow use of the Array constructor
"no-lonely-if": 0, // disallow if as the only statement in an else block (off by default)
"no-new-object": 2, // disallow use of the Object constructor
"no-spaced-func": 2, // disallow space between function identifier and application
"no-tabs": 2,
"no-ternary": 0, // disallow the use of ternary operators (off by default)
"no-trailing-spaces": 2, // disallow trailing whitespace at the end of lines
"no-underscore-dangle": 0, // disallow dangling underscores in identifiers
"no-mixed-spaces-and-tabs": 2, // disallow mixed spaces and tabs for indentation
// "quotes": [1, "single", "avoid-escape"], // specify whether double or single quotes should be used
"quote-props": 0, // require quotes around object literal property names (off by default)
"semi": 2, // require or disallow use of semicolons instead of ASI
"sort-vars": 0, // sort variables within the same declaration block (off by default)
"object-curly-spacing": [2, "always"],
"array-bracket-spacing": 2,
"computed-property-spacing": 2,
"space-in-parens": 2, // require or disallow spaces inside parentheses (off by default)
"space-infix-ops": 2, // require spaces around operators
"space-unary-ops": [2, { "words": true, "nonwords": false }], // require or disallow spaces before/after unary operators (words on by default, nonwords off by default)
"max-nested-callbacks": 0, // specify the maximum depth callbacks can be nested (off by default)
"one-var": 0, // allow just one var statement per function (off by default)
"wrap-regex": 0, // require regex literals to be wrapped in parentheses (off by default)
// Legacy
// The following rules are included for compatibility with JSHint and JSLint. While the names of the rules may not match up with the JSHint/JSLint counterpart, the functionality is the same.
"max-depth": 0, // specify the maximum depth that blocks can be nested (off by default)
"max-len": 0, // specify the maximum length of a line in your program (off by default)
"max-params": 0, // limits the number of parameters that can be used in the function declaration. (off by default)
"max-statements": 0, // specify the maximum number of statement allowed in a function (off by default)
"no-bitwise": 0, // disallow use of bitwise operators (off by default)
"no-plusplus": 0, // disallow use of unary operators, ++ and -- (off by default)
// Flow
"flowtype/boolean-style": [2, "boolean"], // a problem is raised when using bool instead of boolean
"flowtype/define-flow-type": 2,
"flowtype/generic-spacing": 0,
"flowtype/space-before-type-colon": [2, "never"],
"flowtype/space-before-generic-bracket": [2, "never"],
"flowtype/space-after-type-colon": 0,
"flowtype/no-dupe-keys": 2,
"flowtype/union-intersection-spacing": [2, "always"],
"flowtype/no-weak-types": [2, {"any": false, "Object": true, "Function": false}],
"flow-header/flow-header": 2,
// Headers
"header/header": [2, "block", [
"*",
" * Copyright (c) 2017-present, Facebook, Inc.",
" * All rights reserved.",
" *",
" * This source code is licensed under the BSD-style license found in the",
" * LICENSE file in the root directory of this source tree. An additional grant",
" * of patent rights can be found in the PATENTS file in the same directory.",
" ",
]
],
// Prettier
"prettier/prettier": ["error", {
"parser": "flow",
"trailingComma": "es5",
"printWidth": 120,
}],
// Reject imports from lib/*
"no-restricted-imports": ["error", {
"patterns": ["**/../lib/**"]
}]
}
}