1 | /**
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2 | * Copyright (c) Meta Platforms, Inc. and affiliates.
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3 | *
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4 | * This source code is licensed under the MIT license found in the
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5 | * LICENSE file in the root directory of this source tree.
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6 | *
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7 | * @format
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8 | */
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9 |
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10 | module.exports = {
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11 | env: {
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12 | es6: true,
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13 | },
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14 |
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15 | parserOptions: {
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16 | sourceType: 'module',
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17 | },
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18 |
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19 | extends: ['plugin:prettier/recommended'],
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20 |
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21 | plugins: [
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22 | 'eslint-comments',
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23 | 'react',
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24 | 'react-hooks',
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25 | 'react-native',
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26 | '@react-native-community',
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27 | 'jest',
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28 | ],
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29 |
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30 | settings: {
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31 | react: {
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32 | version: 'detect',
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33 | },
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34 | },
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35 |
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36 | overrides: [
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37 | {
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38 | files: ['*.js'],
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39 | parser: '@babel/eslint-parser',
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40 | plugins: ['ft-flow'],
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41 | rules: {
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42 | // Flow Plugin
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43 | // The following rules are made available via `eslint-plugin-ft-flow`
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44 |
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45 | 'ft-flow/define-flow-type': 1,
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46 | 'ft-flow/use-flow-type': 1,
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47 | },
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48 | },
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49 | {
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50 | files: ['*.ts', '*.tsx'],
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51 | parser: '@typescript-eslint/parser',
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52 | plugins: ['@typescript-eslint/eslint-plugin'],
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53 | rules: {
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54 | '@typescript-eslint/no-unused-vars': [
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55 | 'error',
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56 | {
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57 | argsIgnorePattern: '^_',
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58 | destructuredArrayIgnorePattern: '^_',
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59 | },
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60 | ],
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61 | 'no-unused-vars': 'off',
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62 | 'no-shadow': 'off',
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63 | '@typescript-eslint/no-shadow': 1,
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64 | 'no-undef': 'off',
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65 | 'func-call-spacing': 'off',
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66 | '@typescript-eslint/func-call-spacing': 1,
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67 | },
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68 | },
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69 | {
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70 | files: [
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71 | '*.{spec,test}.{js,ts,tsx}',
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72 | '**/__{mocks,tests}__/**/*.{js,ts,tsx}',
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73 | ],
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74 | env: {
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75 | jest: true,
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76 | 'jest/globals': true,
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77 | },
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78 | rules: {
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79 | 'react-native/no-inline-styles': 0,
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80 | quotes: [1, 'single', {avoidEscape: true, allowTemplateLiterals: true}],
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81 | },
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82 | },
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83 | ],
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84 |
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85 | // Map from global var to bool specifying if it can be redefined
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86 | globals: {
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87 | __DEV__: true,
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88 | __dirname: false,
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89 | __fbBatchedBridgeConfig: false,
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90 | AbortController: false,
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91 | Blob: true,
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92 | alert: false,
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93 | cancelAnimationFrame: false,
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94 | cancelIdleCallback: false,
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95 | clearImmediate: true,
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96 | clearInterval: false,
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97 | clearTimeout: false,
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98 | console: false,
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99 | document: false,
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100 | ErrorUtils: false,
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101 | escape: false,
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102 | Event: false,
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103 | EventTarget: false,
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104 | exports: false,
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105 | fetch: false,
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106 | File: true,
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107 | FileReader: false,
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108 | FormData: false,
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109 | global: false,
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110 | Headers: false,
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111 | Intl: false,
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112 | Map: true,
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113 | module: false,
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114 | navigator: false,
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115 | process: false,
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116 | Promise: true,
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117 | requestAnimationFrame: true,
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118 | requestIdleCallback: true,
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119 | require: false,
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120 | Set: true,
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121 | setImmediate: true,
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122 | setInterval: false,
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123 | setTimeout: false,
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124 | queueMicrotask: true,
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125 | URL: false,
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126 | URLSearchParams: false,
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127 | WebSocket: true,
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128 | window: false,
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129 | XMLHttpRequest: false,
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130 | },
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131 |
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132 | rules: {
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133 | // General
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134 | 'comma-dangle': [1, 'always-multiline'], // allow or disallow trailing commas
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135 | 'no-cond-assign': 1, // disallow assignment in conditional expressions
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136 | 'no-console': 0, // disallow use of console (off by default in the node environment)
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137 | 'no-const-assign': 2, // disallow assignment to const-declared variables
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138 | 'no-constant-condition': 0, // disallow use of constant expressions in conditions
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139 | 'no-control-regex': 1, // disallow control characters in regular expressions
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140 | 'no-debugger': 1, // disallow use of debugger
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141 | 'no-dupe-class-members': 2, // Disallow duplicate name in class members
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142 | 'no-dupe-keys': 2, // disallow duplicate keys when creating object literals
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143 | 'no-empty': 0, // disallow empty statements
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144 | 'no-ex-assign': 1, // disallow assigning to the exception in a catch block
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145 | 'no-extra-boolean-cast': 1, // disallow double-negation boolean casts in a boolean context
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146 | 'no-extra-parens': 0, // disallow unnecessary parentheses (off by default)
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147 | 'no-extra-semi': 1, // disallow unnecessary semicolons
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148 | 'no-func-assign': 1, // disallow overwriting functions written as function declarations
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149 | 'no-inner-declarations': 0, // disallow function or variable declarations in nested blocks
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150 | 'no-invalid-regexp': 1, // disallow invalid regular expression strings in the RegExp constructor
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151 | 'no-negated-in-lhs': 1, // disallow negation of the left operand of an in expression
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152 | 'no-obj-calls': 1, // disallow the use of object properties of the global object (Math and JSON) as functions
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153 | 'no-regex-spaces': 1, // disallow multiple spaces in a regular expression literal
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154 | 'no-reserved-keys': 0, // disallow reserved words being used as object literal keys (off by default)
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155 | 'no-sparse-arrays': 1, // disallow sparse arrays
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156 | 'no-unreachable': 2, // disallow unreachable statements after a return, throw, continue, or break statement
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157 | 'use-isnan': 1, // disallow comparisons with the value NaN
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158 | 'valid-jsdoc': 0, // Ensure JSDoc comments are valid (off by default)
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159 | 'valid-typeof': 1, // Ensure that the results of typeof are compared against a valid string
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160 |
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161 | // Best Practices
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162 | // These are rules designed to prevent you from making mistakes. They either prescribe a better way of doing something or help you avoid footguns.
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163 |
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164 | 'block-scoped-var': 0, // treat var statements as if they were block scoped (off by default)
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165 | complexity: 0, // specify the maximum cyclomatic complexity allowed in a program (off by default)
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166 | 'consistent-return': 0, // require return statements to either always or never specify values
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167 | curly: 1, // specify curly brace conventions for all control statements
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168 | 'default-case': 0, // require default case in switch statements (off by default)
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169 | 'dot-notation': 1, // encourages use of dot notation whenever possible
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170 | eqeqeq: [1, 'allow-null'], // require the use of === and !==
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171 | 'guard-for-in': 0, // make sure for-in loops have an if statement (off by default)
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172 | 'no-alert': 1, // disallow the use of alert, confirm, and prompt
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173 | 'no-caller': 1, // disallow use of arguments.caller or arguments.callee
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174 | 'no-div-regex': 1, // disallow division operators explicitly at beginning of regular expression (off by default)
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175 | 'no-else-return': 0, // disallow else after a return in an if (off by default)
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176 | 'no-eq-null': 0, // disallow comparisons to null without a type-checking operator (off by default)
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177 | 'no-eval': 2, // disallow use of eval()
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178 | 'no-extend-native': 1, // disallow adding to native types
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179 | 'no-extra-bind': 1, // disallow unnecessary function binding
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180 | 'no-fallthrough': 1, // disallow fallthrough of case statements
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181 | 'no-floating-decimal': 1, // disallow the use of leading or trailing decimal points in numeric literals (off by default)
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182 | 'no-implied-eval': 1, // disallow use of eval()-like methods
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183 | 'no-labels': 1, // disallow use of labeled statements
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184 | 'no-iterator': 1, // disallow usage of __iterator__ property
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185 | 'no-lone-blocks': 1, // disallow unnecessary nested blocks
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186 | 'no-loop-func': 0, // disallow creation of functions within loops
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187 | 'no-multi-str': 0, // disallow use of multiline strings
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188 | 'no-native-reassign': 0, // disallow reassignments of native objects
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189 | 'no-new': 1, // disallow use of new operator when not part of the assignment or comparison
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190 | 'no-new-func': 2, // disallow use of new operator for Function object
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191 | 'no-new-wrappers': 1, // disallows creating new instances of String,Number, and Boolean
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192 | 'no-octal': 1, // disallow use of octal literals
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193 | 'no-octal-escape': 1, // disallow use of octal escape sequences in string literals, such as var foo = "Copyright \251";
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194 | 'no-proto': 1, // disallow usage of __proto__ property
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195 | 'no-redeclare': 0, // disallow declaring the same variable more then once
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196 | 'no-return-assign': 1, // disallow use of assignment in return statement
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197 | 'no-script-url': 1, // disallow use of javascript: urls.
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198 | 'no-self-compare': 1, // disallow comparisons where both sides are exactly the same (off by default)
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199 | 'no-sequences': 1, // disallow use of comma operator
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200 | 'no-unused-expressions': 0, // disallow usage of expressions in statement position
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201 | 'no-useless-escape': 1, // disallow escapes that don't have any effect in literals
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202 | 'no-void': 1, // disallow use of void operator (off by default)
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203 | 'no-warning-comments': 0, // disallow usage of configurable warning terms in comments": 1, // e.g. TODO or FIXME (off by default)
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204 | 'no-with': 1, // disallow use of the with statement
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205 | radix: 1, // require use of the second argument for parseInt() (off by default)
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206 | 'semi-spacing': 1, // require a space after a semi-colon
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207 | 'vars-on-top': 0, // requires to declare all vars on top of their containing scope (off by default)
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208 | 'wrap-iife': 0, // require immediate function invocation to be wrapped in parentheses (off by default)
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209 | yoda: 1, // require or disallow Yoda conditions
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210 |
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211 | // Variables
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212 | // These rules have to do with variable declarations.
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213 |
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214 | 'no-catch-shadow': 1, // disallow the catch clause parameter name being the same as a variable in the outer scope (off by default in the node environment)
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215 | 'no-delete-var': 1, // disallow deletion of variables
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216 | 'no-label-var': 1, // disallow labels that share a name with a variable
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217 | 'no-shadow': 1, // disallow declaration of variables already declared in the outer scope
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218 | 'no-shadow-restricted-names': 1, // disallow shadowing of names such as arguments
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219 | 'no-undef': 2, // disallow use of undeclared variables unless mentioned in a /*global */ block
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220 | 'no-undefined': 0, // disallow use of undefined variable (off by default)
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221 | 'no-undef-init': 1, // disallow use of undefined when initializing variables
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222 | 'no-unused-vars': [
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223 | 1,
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224 | {vars: 'all', args: 'none', ignoreRestSiblings: true},
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225 | ], // disallow declaration of variables that are not used in the code
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226 | 'no-use-before-define': 0, // disallow use of variables before they are defined
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227 |
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228 | // Node.js
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229 | // These rules are specific to JavaScript running on Node.js.
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230 |
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231 | 'handle-callback-err': 1, // enforces error handling in callbacks (off by default) (on by default in the node environment)
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232 | 'no-mixed-requires': 1, // disallow mixing regular variable and require declarations (off by default) (on by default in the node environment)
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233 | 'no-new-require': 1, // disallow use of new operator with the require function (off by default) (on by default in the node environment)
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234 | 'no-path-concat': 1, // disallow string concatenation with __dirname and __filename (off by default) (on by default in the node environment)
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235 | 'no-process-exit': 0, // disallow process.exit() (on by default in the node environment)
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236 | 'no-restricted-modules': 1, // restrict usage of specified node modules (off by default)
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237 | 'no-sync': 0, // disallow use of synchronous methods (off by default)
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238 |
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239 | // ESLint Comments Plugin
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240 | // The following rules are made available via `eslint-plugin-eslint-comments`
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241 | 'eslint-comments/no-aggregating-enable': 1, // disallows eslint-enable comments for multiple eslint-disable comments
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242 | 'eslint-comments/no-unlimited-disable': 1, // disallows eslint-disable comments without rule names
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243 | 'eslint-comments/no-unused-disable': 1, // disallow disables that don't cover any errors
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244 | 'eslint-comments/no-unused-enable': 1, // // disallow enables that don't enable anything or enable rules that weren't disabled
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245 |
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246 | // Stylistic Issues
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247 | // These rules are purely matters of style and are quite subjective.
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248 |
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249 | 'key-spacing': 0,
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250 | 'keyword-spacing': 1, // enforce spacing before and after keywords
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251 | 'jsx-quotes': [1, 'prefer-double'], // enforces the usage of double quotes for all JSX attribute values which doesn’t contain a double quote
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252 | 'comma-spacing': 0,
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253 | 'no-multi-spaces': 0,
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254 | 'brace-style': 0, // enforce one true brace style (off by default)
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255 | camelcase: 0, // require camel case names
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256 | 'consistent-this': 1, // enforces consistent naming when capturing the current execution context (off by default)
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257 | 'eol-last': 1, // enforce newline at the end of file, with no multiple empty lines
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258 | 'func-names': 0, // require function expressions to have a name (off by default)
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259 | 'func-style': 0, // enforces use of function declarations or expressions (off by default)
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260 | 'new-cap': 0, // require a capital letter for constructors
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261 | 'new-parens': 1, // disallow the omission of parentheses when invoking a constructor with no arguments
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262 | 'no-nested-ternary': 0, // disallow nested ternary expressions (off by default)
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263 | 'no-array-constructor': 1, // disallow use of the Array constructor
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264 | 'no-empty-character-class': 1, // disallow the use of empty character classes in regular expressions
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265 | 'no-lonely-if': 0, // disallow if as the only statement in an else block (off by default)
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266 | 'no-new-object': 1, // disallow use of the Object constructor
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267 | 'func-call-spacing': 1, // disallow space between function identifier and application
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268 | 'no-ternary': 0, // disallow the use of ternary operators (off by default)
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269 | 'no-trailing-spaces': 1, // disallow trailing whitespace at the end of lines
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270 | 'no-underscore-dangle': 0, // disallow dangling underscores in identifiers
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271 | 'no-mixed-spaces-and-tabs': 1, // disallow mixed spaces and tabs for indentation
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272 | quotes: [1, 'single', 'avoid-escape'], // specify whether double or single quotes should be used
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273 | 'quote-props': 0, // require quotes around object literal property names (off by default)
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274 | semi: 1, // require or disallow use of semicolons instead of ASI
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275 | 'sort-vars': 0, // sort variables within the same declaration block (off by default)
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276 | 'space-in-brackets': 0, // require or disallow spaces inside brackets (off by default)
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277 | 'space-in-parens': 0, // require or disallow spaces inside parentheses (off by default)
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278 | 'space-infix-ops': 1, // require spaces around operators
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279 | 'space-unary-ops': [1, {words: true, nonwords: false}], // require or disallow spaces before/after unary operators (words on by default, nonwords off by default)
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280 | 'max-nested-callbacks': 0, // specify the maximum depth callbacks can be nested (off by default)
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281 | 'one-var': 0, // allow just one var statement per function (off by default)
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282 | 'wrap-regex': 0, // require regex literals to be wrapped in parentheses (off by default)
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283 |
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284 | // Legacy
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285 | // 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.
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286 |
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287 | 'max-depth': 0, // specify the maximum depth that blocks can be nested (off by default)
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288 | 'max-len': 0, // specify the maximum length of a line in your program (off by default)
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289 | 'max-params': 0, // limits the number of parameters that can be used in the function declaration. (off by default)
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290 | 'max-statements': 0, // specify the maximum number of statement allowed in a function (off by default)
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291 | 'no-bitwise': 1, // disallow use of bitwise operators (off by default)
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292 | 'no-plusplus': 0, // disallow use of unary operators, ++ and -- (off by default)
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293 |
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294 | // React Plugin
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295 | // The following rules are made available via `eslint-plugin-react`.
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296 |
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297 | 'react/display-name': 0,
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298 | 'react/jsx-boolean-value': 0,
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299 | 'react/jsx-no-comment-textnodes': 2,
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300 | 'react/jsx-no-duplicate-props': 2,
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301 | 'react/jsx-no-undef': 2,
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302 | 'react/jsx-sort-props': 0,
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303 | 'react/jsx-uses-react': 1,
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304 | 'react/jsx-uses-vars': 1,
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305 | 'react/no-did-mount-set-state': 1,
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306 | 'react/no-did-update-set-state': 1,
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307 | 'react/no-multi-comp': 0,
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308 | 'react/no-string-refs': 1,
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309 | 'react/no-unknown-property': 0,
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310 | 'react/no-unstable-nested-components': 1,
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311 | 'react/prop-types': 0,
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312 | 'react/react-in-jsx-scope': 1,
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313 | 'react/self-closing-comp': 1,
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314 | 'react/wrap-multilines': 0,
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315 |
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316 | // React-Hooks Plugin
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317 | // The following rules are made available via `eslint-plugin-react-hooks`
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318 | 'react-hooks/rules-of-hooks': 2,
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319 | 'react-hooks/exhaustive-deps': 2,
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320 |
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321 | // React-Native Plugin
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322 | // The following rules are made available via `eslint-plugin-react-native`
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323 |
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324 | 'react-native/no-inline-styles': 1,
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325 |
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326 | // Jest Plugin
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327 | // The following rules are made available via `eslint-plugin-jest`.
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328 | 'jest/no-disabled-tests': 1,
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329 | 'jest/no-focused-tests': 1,
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330 | 'jest/no-identical-title': 1,
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331 | 'jest/valid-expect': 1,
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332 | },
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333 | };
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