.jshintrc

{
    "node": true,   // node.js mode on
    "esversion": 6, // enable ECMAScript 6 features
    "undef": true,  // don't allow undefined variables
    "eqnull": true, // allow == null which tests for null or undefined which is a good thing
    "sub": true,    // allow [] notation as well as dot notation (eg person['name'] vs person.name)
    "predef": [
        "describe",
        "it"
    ]
}