.eslintrc

{
    "globals": {
        // Put things like jQuery, etc
        "$": true
    },

    "env": {
        // I write for browser
        "browser": true,
        // in CommonJS
        "node": true
    },

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

    "extends": "eslint:recommended",

    // To give you an idea how to override rule options:
    "rules": {
        // Tons of rules you can use, for example...
        "quotes": ["error", "single"],
        "eqeqeq": ["error", "smart"],
        "indent": ["error", 4],
        "no-var": "error",
        "quote-props": ["error", "as-needed", { "keywords": false }],
        "eol-last": ["error", "always"],
        "no-trailing-spaces": "error",
        "space-before-blocks": ["error"],
        "prefer-template": "error",
        "comma-spacing": ["error", { "before": false, "after": true }],
        "space-before-function-paren": ["error", "never"],
        "no-lonely-if": "error",
        "arrow-spacing": "error",
        "key-spacing": ["error", { "beforeColon": false }],
        "keyword-spacing": ["error", { "before": true }],
        "space-infix-ops": "error"
    }
}