CKEditor 4 updateElement on blur

I have a page where I have multiple editors with the class ".ckeditor".

I'm trying to update the values on blur, but blur does not trigger.

$(".ckeditor").on("blur", function() {
            console.log("blur");
            for (var i in CKEDITOR.instances) {
                console.log(i);
                CKEDITOR.instances[i].updateElement();// to update the textarea
            }
        });

Anyone know if they've totally changed its behaviour in ckeditor 4?