jquery Deferred

<script>
    var myVar;
    var myFunc = function(){
        var deferred = new $.Deferred();
        setTimeout(function(){
            myVar = 'hellow world';
            deferred.resolve();
        }, 2000);
        return deferred.promise();
    }
    myFunc().then(
        //Done
        function(){
            console.log('success ' + myVar);
        },
        //Failed
        function(){
            console.log('failed');
        }
        );