.eslintrc

My config file for ESLint:

{
    "parserOptions": {
        "ecmaVersion": 6
    },

    "env": {
        "browser": true,
        "node": true,
        "es6": true,
        "worker": true,
        "jquery": true,
        "serviceworker": true
    },

    "rules": {
        "semi": "error",
        "no-console": "warn",
        "no-alert": "warn",
        "quotes": ["error", "double"],
        "eol-last": ["error"],
        "indent": ["error", 4],
        "no-use-before-define": "error",
        "constructor-super": "error",
        "for-direction": "error",
        "getter-return": "error",
        "no-case-declarations": "error",
        "no-class-assign": "error",
        "no-compare-neg-zero": "error",
        "no-cond-assign": "error",
        "no-const-assign": "error",
        "no-constant-condition": "error",
        "no-control-regex": "error",
        "no-debugger": "error",
        "no-delete-var": "error",
        "no-dupe-args": "error",
        "no-dupe-class-members": "error",
        "no-dupe-keys": "error",
        "no-duplicate-case": "error",
        "no-empty": "error",
        "no-empty-character-class": "error",
        "no-empty-pattern": "error",
        "no-ex-assign": "error",
        "no-extra-boolean-cast": "error",
        "no-extra-semi": "error",
        "no-fallthrough": "error",
        "no-func-assign": "error",
        "no-global-assign": "error",
        "no-inner-declarations": "error",
        "no-invalid-regexp": "error",
        "no-irregular-whitespace": "error",
        "no-mixed-spaces-and-tabs": "error",
        "no-new-symbol": "error",
        "no-obj-calls": "error",
        "no-octal": "error",
        "no-prototype-builtins": "error",
        "no-redeclare": "error",
        "no-regex-spaces": "error",
        "no-self-assign": "error",
        "no-shadow-restricted-names": "error",
        "no-sparse-arrays": "error",
        "no-this-before-super": "error",
        "no-undef": "error",
        "no-unexpected-multiline": "error",
        "no-unreachable": "error",
        "no-unsafe-finally": "error",
        "no-unsafe-negation": "error",
        "no-unused-labels": "error",
        "no-unused-vars": "error",
        "no-useless-escape": "error",
        "no-with": "error",
        "require-yield": "error",
        "use-isnan": "error",
        "valid-typeof": "error"
    }
}

Place this file (.eslintrc) in the root folder of project directory.