.eslintrc.json

{
    "env": {
        "node": true,
        "es6": false
    },
    "extends": "eslint:recommended",
    "globals": {
        "describe": true,
        "it": true,
        "before": true,
        "beforeEach": true,
        "after": true,
        "afterEach": true
    },
    "rules": {
        // indent 4 spaces
        "indent": [
            2,
            4,
            {
                "SwitchCase": 1
            }
        ],
        // use unix lf - and warn if not
        "linebreak-style": [
            1,
            "unix"
        ],
        // prefer single quote
        "quotes": [
            1,
            "single"
        ],
        // prefer semi-colon at the end of the line
        "semi": 1,
        // prefer comma at the end of the line in objects, arrays, etc
        "comma-dangle": [
            1,
            "only-multiline"
        ],
        // if then else on new lines
        "brace-style": [
            "error",
            "1tbs"
        ],
        // prefer spaces around the keywords
        "keyword-spacing": [
            1
        ],
        // don't disallow console statements
        "no-console": "off",
        // enforce curly braces
        "curly": 2,
        // prefer comments with space
        "spaced-comment": 1,
        // don't disallow var keyword
        "no-var": 0,
        // warn on capitalized function names
        "new-cap": 1,
        // space before blocks mandatory
        "space-before-blocks": 2,
        // prefer space before function param parenthisis only when anonymous
        "space-before-function-paren": [
            1,
            {
                "anonymous": "always",
                "named": "never"
            }
        ],
        // require end-of-file newline
        "eol-last": 2,
        // warn unnecessary escapes
        "no-useless-escape": 1,
        // disallow padding within blocks
        "padded-blocks": [2, "never"],
        // no spaces in brackets
        "array-bracket-spacing": 1,
        // yes to spaces in braces
        "object-curly-spacing": [1, "always"]
    }
}