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.eslintrc.js
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.eslintrc.js
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/**
* Copyright (c) Meta Platforms, Inc. and affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*
*/
'use strict';
const restrictedGlobals = require('confusing-browser-globals');
const OFF = 0;
const ERROR = 2;
module.exports = {
// Prettier must be last so it can override other configs (https://github.com/prettier/eslint-config-prettier#installation)
extends: [
'fbjs',
'plugin:react-hooks/recommended',
'plugin:lexical/all',
'prettier',
],
globals: {
JSX: true,
__DEV__: true,
},
overrides: [
{
// We apply these settings to the source files that get compiled.
// They can use all features including JSX (but shouldn't use `var`).
files: [
'packages/*/src/**/*.js',
'packages/*/__tests__/**/*.?(m)js',
'packages/*/src/**/*.jsx',
],
parser: 'babel-eslint',
parserOptions: {
allowImportExportEverywhere: true,
sourceType: 'module',
},
rules: {
'no-var': ERROR,
'prefer-const': ERROR,
strict: OFF,
},
},
{
// node scripts should be console logging so don't lint against that
files: ['scripts/**/*.js'],
rules: {
'no-console': OFF,
},
},
{
env: {
browser: true,
},
extends: [
'eslint:recommended',
'plugin:@typescript-eslint/eslint-recommended',
'plugin:@typescript-eslint/recommended',
],
files: ['**/*.ts', '**/*.tsx'],
parser: '@typescript-eslint/parser',
parserOptions: {
sourceType: 'module',
},
plugins: ['react', '@typescript-eslint', 'header'],
rules: {
'@typescript-eslint/ban-ts-comment': OFF,
'@typescript-eslint/no-this-alias': OFF,
'@typescript-eslint/no-unused-vars': [ERROR, {args: 'none'}],
'header/header': [2, 'scripts/www/headerTemplate.js'],
},
},
{
// don't lint headers in entrypoint files so we can add TypeDoc module comments
files: ['packages/**/src/index.ts'],
rules: {
'header/header': OFF,
},
},
{
// These aren't compiled, but they're written in module JS
files: ['packages/lexical-playground/esm/*.mjs'],
parserOptions: {
sourceType: 'module',
},
},
{
files: [
'packages/**/src/__tests__/**',
'packages/lexical-playground/**',
'packages/lexical-devtools/**',
],
rules: {
'lexical/no-optional-chaining': OFF,
},
},
],
parser: 'babel-eslint',
parserOptions: {
ecmaFeatures: {
experimentalObjectRestSpread: true,
},
ecmaVersion: 8,
sourceType: 'script',
},
plugins: [
'sort-keys-fix',
'simple-import-sort',
'header',
// import helps to configure simple-import-sort
'import',
'jest',
'no-function-declare-after-return',
'react',
'no-only-tests',
'lexical',
],
// Stop ESLint from looking for a configuration file in parent folders
root: true,
// We're stricter than the default config, mostly. We'll override a few rules
// and then enable some React specific ones.
rules: {
'accessor-pairs': OFF,
'brace-style': [ERROR, '1tbs'],
'consistent-return': OFF,
curly: [ERROR, 'all'],
'dot-location': [ERROR, 'property'],
// We use console['error']() as a signal to not transform it:
'dot-notation': [ERROR, {allowPattern: '^(error|warn)$'}],
'eol-last': ERROR,
eqeqeq: [ERROR, 'allow-null'],
// Prettier forces semicolons in a few places
'flowtype/object-type-delimiter': OFF,
'flowtype/sort-keys': ERROR,
'header/header': [2, 'scripts/www/headerTemplate.js'],
// (This helps configure simple-import-sort) Make sure all imports are at the top of the file
'import/first': ERROR,
// (This helps configure simple-import-sort) Make sure there's a newline after the imports
'import/newline-after-import': ERROR,
// (This helps configure simple-import-sort) Merge imports of the same file
'import/no-duplicates': ERROR,
indent: OFF,
'jsx-quotes': [ERROR, 'prefer-double'],
'keyword-spacing': [ERROR, {after: true, before: true}],
// Enforced by Prettier
// TODO: Prettier doesn't handle long strings or long comments. Not a big
// deal. But I turned it off because loading the plugin causes some obscure
// syntax error and it didn't seem worth investigating.
'max-len': OFF,
'no-bitwise': OFF,
'no-console': ERROR,
'no-debugger': ERROR,
// Prevent function declarations after return statements
'no-function-declare-after-return/no-function-declare-after-return': ERROR,
'no-inner-declarations': [ERROR, 'functions'],
'no-multi-spaces': ERROR,
'no-only-tests/no-only-tests': ERROR,
'no-restricted-globals': [ERROR].concat(restrictedGlobals),
'no-restricted-syntax': [ERROR, 'WithStatement'],
'no-shadow': ERROR,
'no-unused-expressions': ERROR,
'no-unused-vars': [ERROR, {args: 'none'}],
'no-use-before-define': OFF,
// Flow fails with with non-string literal keys
'no-useless-computed-key': OFF,
'no-useless-concat': OFF,
// We apply these settings to files that should run on Node.
// They can't use JSX or ES6 modules, and must be in strict mode.
// They can, however, use other ES6 features.
// (Note these rules are overridden later for source files.)
'no-var': ERROR,
quotes: [ERROR, 'single', {allowTemplateLiterals: true, avoidEscape: true}],
// React & JSX
// Our transforms set this automatically
'react/jsx-boolean-value': [ERROR, 'always'],
'react/jsx-no-undef': ERROR,
// We don't care to do this
'react/jsx-sort-prop-types': OFF,
'react/jsx-tag-spacing': ERROR,
'react/jsx-uses-react': ERROR,
// We don't care to do this
'react/jsx-wrap-multilines': [
ERROR,
{assignment: false, declaration: false},
],
'react/no-is-mounted': OFF,
// This isn't useful in our test code
'react/react-in-jsx-scope': ERROR,
'react/self-closing-comp': ERROR,
// This sorts re-exports (`export * from 'foo';`), but not other types of exports.
'simple-import-sort/exports': ERROR,
'simple-import-sort/imports': [
ERROR,
{
// The default grouping, but with type imports first as a separate group.
// See: https://github.com/lydell/eslint-plugin-simple-import-sort/blob/d9a116f71302c5dcfc1581fc7ded8d77392f1924/examples/.eslintrc.js#L122-L133
groups: [['^.*\\u0000$'], ['^\\u0000'], ['^@?\\w'], ['^'], ['^\\.']],
},
],
'sort-keys-fix/sort-keys-fix': ERROR,
'space-before-blocks': ERROR,
'space-before-function-paren': OFF,
strict: ERROR,
'valid-typeof': [ERROR, {requireStringLiterals: true}],
},
};