.eslintrc.js

module.exports = {
    root: true,
    parser: '@typescript-eslint/parser',
    parserOptions: {
      project: 'tsconfig.json',
      tsconfigRootDir: __dirname,
      sourceType: "module"
    },
    plugins: ['@typescript-eslint', 'react', 'import', 'functional', 'sonarjs'],
    extends: [
      'eslint:recommended',
      'plugin:@typescript-eslint/eslint-recommended',
      'plugin:@typescript-eslint/recommended',
      'plugin:react/recommended',
      'plugin:sonarjs/recommended',
      'prettier',
      'prettier/@typescript-eslint',
      'plugin:prettier/recommended',
    ],
    "ignorePatterns": ["**/__integration_tests__/*"],
    rules: {
      'no-case-declarations': 'off',
      'no-inner-declarations': 'off',
      'prefer-const': 'error',
      curly: 'error',
      'spaced-comment': ['error', 'always', { block: { balanced: true } }],
      radix: 'error',
      'one-var': ['error', 'never'],
      'object-shorthand': 'error',
      'no-var': 'error',
      'no-param-reassign': 'error',
      'no-underscore-dangle': 'error',
      'no-undef-init': 'error',
      'no-throw-literal': 'error',
      'no-new-wrappers': 'error',
      'no-eval': 'error',
      'no-console': 'error',
      'no-caller': 'error',
      'no-bitwise': 'error',
      eqeqeq: ['error', 'smart'],
      'max-classes-per-file': ['error', 1],
      'guard-for-in': 'error',
      complexity: 'error',
      'arrow-body-style': 'error',
      'import/order': 'error',
      '@typescript-eslint/no-unused-vars': 'off',
      // Enable if we want to enforce the return type for all the functions
      '@typescript-eslint/explicit-module-boundary-types': 'off',
      '@typescript-eslint/no-inferrable-types': 'off',
      // TODO: added for compatibility. Removing this line we have to remove all the any usage in the code
      '@typescript-eslint/no-explicit-any': 'off',
      '@typescript-eslint/array-type': [
        'error',
        {
          default: 'generic',
        },
      ],
      '@typescript-eslint/await-thenable': 'error',
      '@typescript-eslint/consistent-type-assertions': 'error',
      '@typescript-eslint/dot-notation': 'error',
      '@typescript-eslint/member-delimiter-style': [
        'error',
        {
          multiline: {
            delimiter: 'semi',
            requireLast: true,
          },
          singleline: {
            delimiter: 'semi',
            requireLast: false,
          },
        },
      ],
      '@typescript-eslint/no-floating-promises': 'error',
      'no-unused-expressions': 'off',
      '@typescript-eslint/no-unused-expressions': ['error'],
      '@typescript-eslint/prefer-function-type': 'error',
      '@typescript-eslint/restrict-plus-operands': 'error',
      semi: 'off',
      '@typescript-eslint/semi': ['error'],
      '@typescript-eslint/unified-signatures': 'error',
      'react/prop-types': 'off',
      'react/display-name': 'off',
      'react/jsx-key': 'error',
      'react/jsx-no-bind': ['error', { allowArrowFunctions: true }],
      'functional/no-let': 'error',
      'functional/immutable-data': 'error',
      'sonarjs/no-small-switch': 'off',
      'sonarjs/no-duplicate-string': 'off',
    },
    settings: {
      react: {
        version: 'detect',
      },
    },
  };