next.js/.eslintrc.json at canary · vercel/next.js

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	{
	"root": true,
	"parser": "@babel/eslint-parser",
	"plugins": ["react", "react-hooks", "jest", "import", "jsdoc"],
	"env": {
	"browser": true,
	"commonjs": true,
	"es6": true,
	"node": true
	},
	"parserOptions": {
	"requireConfigFile": false,
	"sourceType": "module",
	"ecmaFeatures": {
	"jsx": true
	},
	"babelOptions": {
	"presets": ["next/babel"],
	"caller": {
	// Eslint supports top level await when a parser for it is included. We enable the parser by default for Babel.
	"supportsTopLevelAwait": true
	}
	}
	},
	"settings": {
	"react": {
	"version": "detect"
	},
	"import/internal-regex": "^next/"
	},
	"overrides": [
	{
	"files": ["test/*/.js", "test/*/.ts", "*/.test.ts"],
	"extends": ["plugin:jest/recommended"],
	"rules": {
	"jest/expect-expect": "off",
	"jest/no-disabled-tests": "off",
	"jest/no-conditional-expect": "off",
	"jest/valid-title": "off",
	"jest/no-interpolation-in-snapshots": "off",
	"jest/no-export": "off"
	}
	},
	{ "files": ["/__tests__/"], "env": { "jest": true } },
	{
	"files": ["*/.ts", "*/.tsx"],
	"parser": "@typescript-eslint/parser",
	"parserOptions": {
	"ecmaVersion": 2018,
	"sourceType": "module",
	"ecmaFeatures": {
	"jsx": true
	},
	"warnOnUnsupportedTypeScriptVersion": false
	},
	"plugins": ["@typescript-eslint"],
	"rules": {
	// Already handled by TS
	"no-dupe-class-members": "off",
	"no-undef": "off",

	// Add TypeScript specific rules (and turn off ESLint equivalents)
	"@typescript-eslint/consistent-type-assertions": "warn",
	"no-array-constructor": "off",
	"@typescript-eslint/no-array-constructor": "warn",
	"@typescript-eslint/no-namespace": "error",
	"no-use-before-define": "off",
	"@typescript-eslint/no-use-before-define": [
	"warn",
	{
	"functions": true,
	"classes": true,
	"variables": true,
	"enums": true,
	"typedefs": true
	}
	],
	"no-unused-vars": "off",
	"@typescript-eslint/no-unused-vars": [
	"warn",
	{
	"args": "none",
	"ignoreRestSiblings": true
	}
	],
	"no-unused-expressions": "off",
	"@typescript-eslint/no-unused-expressions": [
	"error",
	{
	"allowShortCircuit": true,
	"allowTernary": true,
	"allowTaggedTemplates": true
	}
	],
	"no-useless-constructor": "off",
	"@typescript-eslint/no-useless-constructor": "warn",
	"@typescript-eslint/prefer-literal-enum-member": "error",
	"@typescript-eslint/prefer-namespace-keyword": "error"
	},
	"overrides": [
	{
	"files": ["packages/**"],
	"rules": {
	"jsdoc/no-types": "error",
	"jsdoc/no-undefined-types": "error"
	}
	}
	]
	},
	{
	"files": [
	"test/*/",
	"examples/*/",
	"packages/create-next-app/templates/*/"
	],
	"rules": { "react/react-in-jsx-scope": "off" }
	},
	{
	"files": ["examples/*/"],
	"rules": {
	"@typescript-eslint/no-use-before-define": [
	"error",
	{
	"functions": true,
	"classes": true,
	"variables": true,
	"enums": true,
	"typedefs": true
	}
	],
	"import/no-anonymous-default-export": [
	"error",
	{
	// React components:
	"allowArrowFunction": false,
	"allowAnonymousClass": false,
	"allowAnonymousFunction": false,

	// Non-React stuff:
	"allowArray": true,
	"allowCallExpression": true,
	"allowLiteral": true,
	"allowObject": true
	}
	]
	}
	},
	{
	"files": ["packages/**"],
	"rules": {
	"no-shadow": ["warn", { "builtinGlobals": false }],
	"import/no-extraneous-dependencies": [
	"error",
	{ "devDependencies": false }
	]
	}
	},
	{
	"files": ["packages/*/.tsx", "packages/*/.ts"],
	"rules": {
	// Note: you must disable the base rule as it can report incorrect errors
	"no-shadow": "off",
	"@typescript-eslint/no-shadow": ["warn", { "builtinGlobals": false }],
	"@typescript-eslint/no-unused-vars": [
	"warn",
	{
	"args": "all",
	"argsIgnorePattern": "^_",
	"ignoreRestSiblings": true
	}
	]
	}
	},
	{
	"files": [
	"packages/eslint-plugin-next/*/.js",
	"test/unit/eslint-plugin-next/*/.test.ts"
	],
	"extends": ["plugin:eslint-plugin/recommended"],
	"parserOptions": {
	"sourceType": "script"
	},
	"rules": {
	"eslint-plugin/prefer-replace-text": "error",
	"eslint-plugin/report-message-format": [
	"error",
	".+\\. See: https://nextjs.org/docs/messages/[a-z\\-]+$"
	],
	"eslint-plugin/require-meta-docs-description": [
	"error",
	{
	"pattern": ".+"
	}
	],
	"eslint-plugin/require-meta-docs-url": "error"
	}
	}
	],
	"rules": {
	"array-callback-return": "warn",
	"default-case": ["warn", { "commentPattern": "^no default$" }],
	"dot-location": ["warn", "property"],
	"eqeqeq": ["warn", "smart"],
	"new-parens": "warn",
	"no-array-constructor": "warn",
	"no-caller": "warn",
	"no-cond-assign": ["warn", "except-parens"],
	"no-const-assign": "warn",
	"no-control-regex": "warn",
	"no-delete-var": "warn",
	"no-dupe-args": "warn",
	"no-dupe-class-members": "warn",
	"no-dupe-keys": "warn",
	"no-duplicate-case": "warn",
	"no-empty-character-class": "warn",
	"no-empty-pattern": "warn",
	"no-eval": "warn",
	"no-ex-assign": "warn",
	"no-extend-native": "warn",
	"no-extra-bind": "warn",
	"no-extra-label": "warn",
	"no-fallthrough": "warn",
	"no-func-assign": "warn",
	"no-implied-eval": "warn",
	"no-invalid-regexp": "warn",
	"no-iterator": "warn",
	"no-label-var": "warn",
	"no-labels": ["warn", { "allowLoop": true, "allowSwitch": false }],
	"no-lone-blocks": "warn",
	"no-loop-func": "warn",
	"no-mixed-operators": [
	"warn",
	{
	"groups": [
	["&", "\|", "^", "~", "<<", ">>", ">>>"],
	["==", "!=", "===", "!==", ">", ">=", "<", "<="],
	["&&", "\|\|"],
	["in", "instanceof"]
	],
	"allowSamePrecedence": false
	}
	],
	"no-multi-str": "warn",
	"no-native-reassign": "warn",
	"no-negated-in-lhs": "warn",
	"no-new-func": "warn",
	"no-new-object": "warn",
	"no-new-symbol": "warn",
	"no-new-wrappers": "warn",
	"no-obj-calls": "warn",
	"no-octal": "warn",
	"no-octal-escape": "warn",
	"no-regex-spaces": "warn",
	"no-restricted-syntax": [
	"warn",
	"WithStatement",
	{
	"message": "substr() is deprecated, use slice() or substring() instead",
	"selector": "MemberExpression > Identifier[name='substr']"
	}
	],
	"no-script-url": "warn",
	"no-self-assign": "warn",
	"no-self-compare": "warn",
	"no-sequences": "warn",
	"no-shadow-restricted-names": "warn",
	"no-sparse-arrays": "warn",
	"no-template-curly-in-string": "error",
	"no-this-before-super": "warn",
	"no-throw-literal": "warn",
	"no-undef": "error",
	"no-unexpected-multiline": "warn",
	"no-unreachable": "warn",
	"no-unused-expressions": [
	"error",
	{
	"allowShortCircuit": true,
	"allowTernary": true,
	"allowTaggedTemplates": true
	}
	],
	"no-unused-labels": "warn",
	"no-unused-vars": [
	"warn",
	{
	"args": "none",
	"ignoreRestSiblings": true
	}
	],
	"no-use-before-define": [
	"warn",
	{
	"functions": false,
	"classes": false,
	"variables": false
	}
	],
	"no-useless-computed-key": "warn",
	"no-useless-concat": "warn",
	"no-useless-constructor": "warn",
	"no-useless-escape": "warn",
	"no-useless-rename": [
	"warn",
	{
	"ignoreDestructuring": false,
	"ignoreImport": false,
	"ignoreExport": false
	}
	],
	"no-with": "warn",
	"no-whitespace-before-property": "warn",
	"react-hooks/exhaustive-deps": "warn",
	"require-yield": "warn",
	"rest-spread-spacing": ["warn", "never"],
	"strict": ["warn", "never"],
	"unicode-bom": ["warn", "never"],
	"use-isnan": "warn",
	"valid-typeof": "warn",
	"getter-return": "warn",
	"react/forbid-foreign-prop-types": ["warn", { "allowInPropTypes": true }],
	"react/jsx-no-comment-textnodes": "warn",
	"react/jsx-no-duplicate-props": "warn",
	"react/jsx-no-target-blank": "warn",
	"react/jsx-no-undef": "error",
	"react/jsx-pascal-case": [
	"warn",
	{
	"allowAllCaps": true,
	"ignore": []
	}
	],
	"react/jsx-uses-react": "warn",
	"react/jsx-uses-vars": "warn",
	"react/no-danger-with-children": "warn",
	"react/no-deprecated": "warn",
	"react/no-direct-mutation-state": "warn",
	"react/no-is-mounted": "warn",
	"react/no-typos": "error",
	"react/react-in-jsx-scope": "error",
	"react/require-render-return": "error",
	"react/style-prop-object": "warn",
	"react-hooks/rules-of-hooks": "error",
	// "@typescript-eslint/non-nullable-type-assertion-style": "warn",
	"@typescript-eslint/prefer-as-const": "warn",
	"@typescript-eslint/no-redeclare": [
	"warn",
	{ "builtinGlobals": false, "ignoreDeclarationMerge": true }
	]
	}
	}