.eslintrc.js

module.exports = {
    env: {
        browser: true,
        commonjs: true,
        es6: true,
        node: true,
    },
    extends: [
        'airbnb-base',
    ],
    globals: {
        Atomics: 'readonly',
        SharedArrayBuffer: 'readonly',
    },
    parserOptions: {
        ecmaVersion: 2018,
    },
    rules: {
        indent: [2, 4],
        'no-underscore-dangle': 'off',
        camelcase: 'off',
        'no-unused-vars': 'off',
        'no-restricted-syntax': [
            'error',
            {
                selector: 'ForInStatement',
                message:
            'for..in loops iterate over the entire prototype chain, which is virtually never what you want. Use Object.{keys,values,entries}, and iterate over the resulting array.',
            },
            {
                selector: 'LabeledStatement',
                message:
            'Labels are a form of GOTO; using them makes code confusing and hard to maintain and understand.',
            },
            {
                selector: 'WithStatement',
                message:
            '`with` is disallowed in strict mode because it makes code impossible to predict and optimize.',
            },
        ],
    },
    overrides: [
        {
            files: [
                '**/*.test.js',
                '**/*.spec.js',
                '**/*.spec.jsx',
            ],
            env: {
                jest: true,
            },
        },
    ],
};