.eslintrc

{
    "root": true,
    "parserOptions": {
        "ecmaVersion": 2017,
        "sourceType": "module",
        "ecmaFeatures": {
            "impliedStrict": true
        }
    },
    "env": {
        "node": true,
        "es6": true
    },
    "extends": ["eslint:recommended"],
    "rules": {
        // basic rules
        "semi": 1,
        "semi-style": 2,
        "semi-spacing": 1,
        "camelcase": 2,
        "quotes": ["warn", "single", {
            "avoidEscape": true,
            "allowTemplateLiterals": false
        }],
        "brace-style": 2,

        // just to make sure (are defaults)
        "indent": ["error", 2],

        // technically required, because of CSP
        "no-eval": 2,
        "no-implied-eval": 2,

        // great new EcmaScript features
        "prefer-const": 2,
        "no-var": 1,
        "prefer-arrow-callback": 1,
        "prefer-rest-params": 2,
        "prefer-spread": 2,
        "prefer-template": 1,
        "template-curly-spacing": 1,
        "symbol-description": 2,
        "object-shorthand": 1,
        "prefer-promise-reject-errors": 2,
        /* "prefer-destructuring": 1, */ // https://github.com/eslint/eslint/issues/10250

        // additional rules
        "no-new-object": 2,
        "eqeqeq": ["error", "smart"],
        "curly": ["error", "all"],
        "dot-notation": 2,
        "no-array-constructor": 2,
        "no-throw-literal": 2,
        "no-self-compare": 2,
        "no-useless-call": 1,
        "consistent-return": 2,
        "spaced-comment": 1,
        "no-multi-spaces": 1,
        "no-new-wrappers": 2,
        "no-script-url": 2,
        "no-void": 1,
        "vars-on-top": 1,
        "yoda": ["error", "never"],
        /* "no-warning-comments": 1, */ // should be enabled later
        "require-await": 1,
        "wrap-iife": ["error", "inside"],
        "no-loop-func": 2,
        "linebreak-style": 1, // may be disabled if contributing on Windows
    }
}