.eslintrc.js

module.exports = {
    extends: ["airbnb-base", "eslint:recommended"],
    env: {
        browser: true,
        es6: true,
        node: true,
        mocha: true,
        jasmine: true,
        jest: true
    },
    rules: {
        // enable additional rules
        indent: [
            "error",
            4,
            {
                SwitchCase: 1
            }
        ],
        "linebreak-style": ["error", "unix"],
        quotes: ["error", "single"],
        semi: ["error", "always"],
        "no-unused-vars": ["error", { vars: "local" }],
        "no-plusplus": "off",

        // override default options for rules from base configurations
        "no-cond-assign": ["error", "always"],
        eqeqeq: ["warn", "smart"],

        // disable rules from base configurations
        "no-console": "off",
        "no-alert": "off",
        "func-names": "off",
        "block-scoped-var": "error",
        "guard-for-in": "error",
        "no-loop-func": "error",
        "no-self-compare": "error",
        "no-unneeded-ternary": "error",
        "import/prefer-default-export": "off",
        "no-underscore-dangle": "off",
        "class-methods-use-this": "off"
    }
};