.eslintrc

{
    "parserOptions": {
        "ecmaVersion": 6,
        "sourceType": "module"
    },
    /*
    * ENVIRONMENTS
    * =================
    */
    "env": {

        // Define globals exposed by modern browsers.
        "browser": true,

        // Allow CommonJS writing
        "node": true,

        // es2015
        "es6":true,

        // mocha test framework
        "mocha":true
    },

    "globals": {

    },

    "rules": {

        /*
        * ENFORCING OPTIONS
        * =================
        */

        // Prohibits use of == and != in favor of === and !==.
        "eqeqeq": 2,

        // Requires all for in loops to filter object's items.
        "guard-for-in": 2,

        // Prohibits overwriting prototypes of native objects such as Array, Date and so on.
        "no-extend-native": 2,

        // Prohibits use of a variable before it is defined.
        "no-use-before-define": 2,

        // Prohibits the use of arguments.caller and arguments.callee.
        "no-caller": 2,

        // Prohibits the use of the comma operator.
        "no-sequences": 2,

        // Warns about "non-breaking whitespace" characters.
        "no-irregular-whitespace": 2,

        // Prohibits the use of constructor functions for side-effects.
        "no-new": 2,

        // Nope, thanks to strict-loader for webpack & use-strict module for node
        "strict": 0,

        // Prohibits use of explicitly undeclared variables.
        "no-undef": 2,

        // Warns when variables are defined but never used.
        "no-unused-vars": 2,

        // requireCurlyBraces
        "curly": [
            2,
            "multi-line",
            "consistent"
        ],

        "keyword-spacing": [
            2,
            {
                "before": true,
                //requireSpaceAfterKeywords
                "after": true
            }
        ],

        //requireSpaceBeforeBlockStatements
        "space-before-blocks": [
            2,
            {
                //requireSpacesInFunctionExpression
                //requireSpacesInAnonymousFunctionExpression
                "functions": "always",
                "keywords": "always",
                "classes": "always"
            }
        ],

        //requireParenthesesAroundIIFE
        "wrap-iife": 2,

        "space-before-function-paren": [
            2,
            {
                //disallowSpacesInAnonymousFunctionExpression
                "anonymous": "never",

                //disallowSpacesInFunctionExpression
                "named": "never"
            }
        ],

        //disallowEmptyBlocks
        "no-empty": 2,

        //disallowSpacesInsideArrayBrackets
        "array-bracket-spacing": [
            2,
            "never"
        ],

        //disallowSpacesInsideParentheses
        "space-in-parens": [
            2,
            "never"
        ],

        //disallowQuotedKeysInObjects
        "quote-props": [
            2,
            "as-needed",
            {
                "keywords": true
            }
        ],

        //disallowSpaceAfterObjectKeys
        "key-spacing": [
            2,
            {
                "beforeColon": false,
                "afterColon": true
            }
        ],

        //requireCommaBeforeLineBreak
        "comma-style": [
            2,
            "last"
        ],

        //requireOperatorBeforeLineBreak
        "operator-linebreak": [
            2,
            "after"
        ],

        //disallowSpaceBeforePostfixUnaryOperators
        "space-unary-ops": [
            2,
            {
                "words": false,
                "nonwords": false,

                //requireSpaceBeforeBinaryOperators
                //requireSpaceAfterBinaryOperators
                "overrides" :{
                    "=":true,
                    "==":true,
                    "===":true,
                    "!=":true,
                    "!==":true,
                    "||":true,
                    "&&":true
                }
            }
        ],

        //requireSpaceAfterBinaryOperators ","
        "comma-spacing":[
            2,
            {
                "before": false,
                "after": true
            }
        ],

        //requireSpacesInConditionalExpression
        "space-infix-ops": 2,

        //requireCamelCaseOrUpperCaseIdentifiers
        "camelcase": [
            2,
            {
                "properties": "always"
            }
        ],

        //disallowKeywords
        "no-with": 2,

        //disallowMultipleLineStrings
        "no-multi-str": 2,

        //validateQuoteMarks
        "quotes": [
            2,
            "single",
            "avoid-escape"
        ],

        //validateIndentation
        "indent": [
            2,
            4,
            {
                "SwitchCase": 1,
                "VariableDeclarator": 1
            }
        ],

        //disallowMixedSpacesAndTabs
        "no-mixed-spaces-and-tabs": 2,

        //disallowTrailingWhitespace
        "no-trailing-spaces": 2,

        //disallowTrailingComma
        "comma-dangle": [
            2,
            "never"
        ],

        //disallowKeywordsOnNewLine
        "brace-style": 2,

        //requireCapitalizedConstructors
        "new-cap": 2,

        //safeContextKeyword
        "consistent-this": [
            2,
            "that"
        ],

        //requireDotNotation
        "dot-notation": 2,

        //jsDoc
        "valid-jsdoc": 2,

        //requireSpaceAfterLineComment
        "spaced-comment": [
            2,
            "always"
        ],

        //requireLineFeedAtFileEnd
        "eol-last": 2
    }
}