.eslintrc.js

module.exports = {
  overrides: [
    {
      files: ['*.ts', '*.tsx'],
      parserOptions: {
        project: ['./tsconfig.json'],
      },
    },
  ],
  parser: '@typescript-eslint/parser',
  extends: [
    'plugin:@typescript-eslint/recommended',
    'plugin:compat/recommended',
    'plugin:react/recommended',
    'plugin:react/jsx-runtime',
    'next/core-web-vitals',
  ],
  plugins: ['@typescript-eslint', 'ban'],
  env: {
    browser: true,
  },
  rules: {
    'array-callback-return': ['error', { allowImplicit: true }],
    'default-case': ['error', { commentPattern: '^no default$' }],
    eqeqeq: ['error', 'always', { null: 'ignore' }],
    'valid-typeof': ['error', { requireStringLiterals: true }],
    '@typescript-eslint/restrict-template-expressions': [
      'error',
      {
        allowNumber: true,
      },
    ],
    '@typescript-eslint/no-floating-promises': 'error',
    '@typescript-eslint/no-misused-promises': [
      'error',
      {
        // See https://github.com/typescript-eslint/typescript-eslint/blob/main/packages/eslint-plugin/docs/rules/no-misused-promises.md#checksvoidreturn
        checksVoidReturn: {
          arguments: false,
          attributes: false,
        },
      },
    ],
    '@typescript-eslint/promise-function-async': 'error',
    '@typescript-eslint/no-unused-vars': ['off'],
    '@typescript-eslint/no-non-null-assertion': ['off'],
    '@typescript-eslint/no-explicit-any': ['off'],
    '@typescript-eslint/no-namespace': ['off'],
    '@typescript-eslint/ban-ts-comment': ['off'],
    'prefer-const': ['off'],
    'no-implicit-globals': 'off',
    'no-restricted-syntax': [
      'warn',
      {
        selector: "MemberExpression[property.name='filter']",
        message: '_.filter and Array.filter have too permissive typings, use filterSync',
      },
    ],
    'ban/ban': [
      1, // warning
      {
        name: ['_', 'reverse'],
        message: '_.reverse mutates the array in-place; use R.reverse',
      },
      {
        name: ['_', 'orderBy'],
        message: '_.orderBy has bad typings, use the version from lib/array',
      },
    ],
    'react/no-unstable-nested-components': ['error'],
    // Buggy
    'react/prop-types': ['off'],
    // We don't use next/image on purpose because we want 'next export' to work
    '@next/next/no-img-element': ['off'],
  },
}