.eslintrc.json

{
    "env"          : {
        "browser" : true,
        "amd"     : true,
        "commonjs": true,
        "es6"     : true,
        "node"    : true,
        "mocha"   : true
    },
    "globals"      : {},
    "parserOptions": {
        "parser"     : "@babel/eslint-parser",
        "ecmaVersion": 9,
        "sourceType" : "module"
    },
    "extends"      : [
        "eslint:recommended"
    ],
    "rules"        : {
        "no-constant-condition"   : "off",
        "no-extra-boolean-cast"   : "off",
        "no-fallthrough"          : "off",
        "no-case-declarations"    : "off",
        "indent"                  : [
            "error",
            4,
            {
                "SwitchCase": 1
            }
        ],
        "semi"                    : [
            "error",
            "always"
        ],
        "brace-style"             : [
            "error",
            "1tbs"
        ],
        "quotes"                  : [
            "error",
            "single"
        ],
        "linebreak-style"         : [
            "error",
            "unix"
        ],
        "no-mixed-spaces-and-tabs": [
            "error",
            "smart-tabs"
        ]
    }
}