.jshintrc

{
    /*
     * ENVIRONMENTS
     * =================
     */

    // This option defines globals exposed by modern browsers: all the way from good old document and navigator to the HTML5 FileReader and other new developments in the browser world.
    "browser": true,

    // This option defines globals exposed by the "BDD" and "TDD" UIs of the Mocha unit testing framework.
    "mocha": true,

    // Define globals exposed by Node.js.
    "node": true,

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

    // This option requires you to always put curly braces around blocks in loops and conditionals.
    "curly": true,

    // This options prohibits the use of == and != in favor of === and !==.
    "eqeqeq": true,

    // This option is used to specify the ECMAScript version to which the code must adhere.
    "esversion": 6,

    // This option requires all for in loops to filter object's items.
    "forin": true,

    // This options prohibits overwriting prototypes of native objects such as Array, Date and so on.
    "freeze": true,

    // This option prohibits the use of a variable before it was defined.
    "latedef": true,

    // This option prohibits the use of arguments.caller and arguments.callee.
    "noarg": true,

    // This option warns about "non-breaking whitespace" characters.
    "nonbsp": true,

    // This option prohibits the use of constructor functions for side-effects.
    "nonew": true,

    // This option prohibits the use of explicitly undeclared variables.
    "undef": true,

    // This option warns when you define and never use your variables.
    "unused": true,


    /*
     * RELAXING OPTIONS
     * =================
     */

    // Suppress warnings about == null comparisons.
    "eqnull": true
}