.eslintrc.js

module.exports = {
  root: true,
  parser: '@typescript-eslint/parser',
  env: {
    'react-native/react-native': true,
  },
  plugins: ['react', 'react-native', '@typescript-eslint'],
  ignorePatterns: ['node_modules/**/*', 'vendor/**/*'],
  overrides: [
    {
      files: ['*.ts', '*.tsx'],
      rules: {
        semi: 'warn',
        eqeqeq: 'warn',
        'max-len': [
          'warn',
          {
            code: 140,
            ignoreUrls: true,
            ignoreStrings: true,
            ignoreComments: true,
            ignoreTrailingComments: true,
            ignoreTemplateLiterals: true,
          },
        ],
        'eol-last': ['warn', 'always'],
        indent: [
          'warn',
          2,
          {
            VariableDeclarator: 'first',
            flatTernaryExpressions: true,
          },
        ],
        'spaced-comment': ['warn', 'always'],
        curly: ['warn', 'all'],
        'brace-style': [
          'warn',
          '1tbs',
          {
            allowSingleLine: true,
          },
        ],
        quotes: [
          'warn',
          'single',
          {
            allowTemplateLiterals: true,
          },
        ],
        'object-curly-spacing': [
          'warn',
          'always',
          {
            arraysInObjects: false,
          },
        ],
        'prefer-const': 'warn',
        'no-debugger': 'error',
        'no-unreachable': 'error',
        'no-dupe-keys': 'warn',
        'no-duplicate-case': 'warn',
        'no-duplicate-imports': 'error',
        'no-regex-spaces': 'warn',
        'no-fallthrough': 'error',
        'no-var': 'error',
        'no-unused-expressions': 'warn',
        'no-trailing-spaces': 'off',
        'no-multiple-empty-lines': [
          'warn',
          {
            max: 1,
            maxBOF: 0,
            maxEOF: 1,
          },
        ],
        'sort-imports': [
          'warn',
          {
            ignoreCase: true,
            allowSeparatedGroups: true,
            memberSyntaxSortOrder: ['none', 'all', 'single', 'multiple'],
          },
        ],
      },
    },
  ],
};