.eslintrc.js

module.exports = {
    "env": {
        "browser": true,
        "es6": true,
        "node": true,
        "jest": true
    },
    "extends": "eslint:recommended",
    "globals": {
        "Atomics": "readonly",
        "SharedArrayBuffer": "readonly",
        page: true,
        browser: true,
        context: true,
        jestPuppeteer: true,
    },
    "parserOptions": {
        sourceType: 'module',
        ecmaVersion: 6,
        ecmaFeatures: {
            'jsx': true
        }
    },
    "plugins": [
        "react"
    ],
    "rules": {
        /* Indentation */
        'no-mixed-spaces-and-tabs': 2,
        'indent': [2, 2],
        /* Variable names */
        'camelcase': 2,
        /* Language constructs */
        'curly': 2,
        'eqeqeq': [2, 'smart'],
        'func-style': [1, 'expression'],
        /* Semicolons */
        'semi': 2,
        'no-extra-semi': 2,
        /* Padding & additional whitespace (perferred but optional) */
        'brace-style': [2, '1tbs', { 'allowSingleLine': true }],
        'semi-spacing': 1,
        'key-spacing': 1,
        'block-spacing': 1,
        'comma-spacing': 1,
        'no-multi-spaces': 1,
        'space-before-blocks': 1,
        'keyword-spacing': [1, { 'before': true, 'after': true }],
        'space-infix-ops': 1,
        /* Variable declaration */
        'one-var': [1, { 'uninitialized': 'never', 'initialized': 'never' }],
        'no-use-before-define': [2, { 'functions': false }],
        /* Minuta */
        'comma-style': [2, 'last'],
        'quotes': [1, 'single']
    }
};