.eslintrc.js

module.exports = {
    extends: [
        'airbnb',
        'plugin:@typescript-eslint/eslint-recommended',
        'plugin:@typescript-eslint/recommended',
    ],
    parser: '@typescript-eslint/parser',
    plugins: ['import', 'prettier'],
    rules: {
        'no-restricted-syntax': 'off',
        'spaced-comment': ['error', 'always', { markers: ['/'] }],
        'comma-dangle': ['error', 'always-multiline'],
        'arrow-parens': ['error', 'always'],

        'space-before-function-paren': [
            'error',
            {
                anonymous: 'never',
                named: 'never',
                asyncArrow: 'always',
            },
        ],
        indent: 'off',
        'max-len': [
            'error',
            120,
            2,
            {
                ignoreUrls: true,
                ignoreComments: false,
                ignoreRegExpLiterals: true,
                ignoreStrings: true,
                ignoreTemplateLiterals: true,
            },
        ],
        'implicit-arrow-linebreak': 'off',
        'no-plusplus': 'off',
        'max-classes-per-file': 'off',
        'operator-linebreak': 'off',
        'object-curly-newline': 'off',
        'class-methods-use-this': 'off',
        'no-confusing-arrow': 'off',
        'function-paren-newline': 'off',
        'no-param-reassign': 'off',
        'no-shadow': 'warn',
        'space-before-function-paren': 'off',

        'prettier/prettier': 'error',

        '@typescript-eslint/explicit-function-return-type': 'off',

        'import/prefer-default-export': 'off',
        'import/order': [
            'error',
            {
                groups: [['builtin', 'external'], 'internal', 'parent', 'sibling', 'index'],
                'newlines-between': 'always',
            },
        ],
        'import/no-unresolved': 'off',
        'import/extensions': 'off',
        'import/no-extraneous-dependencies': ['off'],
    },
    overrides: [
        {
            files: ['*.tsx?'],
            env: {
                browser: true,
            },
            globals: {
                window: true,
                document: true,
            },
        },
        {
            files: ['*.test.tsx?', '*.test.js'],
            plugins: ['jest'],
            env: {
                browser: true,
                mocha: true,
                'jest/globals': true,
            },
        },
    ],
    settings: {
        react: {
            version: '16.13.1',
        },
    },
};