O&n shortcut?


Hello! I've been having some problems with the o & n shortcut - the exercise let me go on with the exercise even if the code didn't actually work? even when i pressed o nothing happened but apparently the code was good enough? but now i'm stuck on the n shortcut exercise and i get this message: "Oops, try again. It looks like the n key isn't moving to the next article. Remember to remove the 'current' class from currentArticle and place it on nextArticle."
I probably made a very dumb mistake but if you could point out what I'm doing wrong I'd be really grateful!!

var main = function() {
$('.article').click(function() {


$(document).keypress(function(event) {
if(event.which === 111) {
else if(event.which === 110) {
var currentArticle = $('.current');
var nextArticle = currentArticle.next();






Hi Grazia,

You need to close your main function with a closing curly brace (}) on the next to last line :slightly_smiling:



+++++ addClass removeClass

Every HTML-Element has so called attributes.
One of the possible attributes, is the class-attribute.

If you write the HTML-document, you add the class-attribute
within the Element-Tag by using the syntax
class-keyword = then a string
containing the class-name
OR mutliple class-names which are =separated=from=eachother= by a space

Thus with

 <div class="myClass1 myClass2 myClass3" ></div>

you now have a DIV-Element carrying 3 classes myClass1, myClass2 and myClass3

As part of its CSS-category-of-Methods jQuery gives you the ability
to manipulate this class-attribute
by providing the addClass()-, removeClass()-, toggleClass()-Methods.
You will have to provide the Method at least 1 argument
which is the string VALUE of the class-name.
Thus you have to change

The confusion when to use a pre-pending dot or NOT...
In the Cascading Style Sheet syntax,
you have to prepend-a-dot to the classname
so the CSS will interpret it as a class-attribute
So in the file style.css you will find an object
identified by .current,
In this .current object
the background property-key is set to a particular VALUE

jQuery uses the same syntax to identify a class-attribute
like in the jQuery-selector
$(".current") by which this HTML-Element and all it's CHILDREN
are selected into a jQuery-object,

This parent-HTML-Element carries the class-attribute with class-name "current"


google search
class site:jquery.com


The structure of your =main= function should look like

    var main=function() {
         $('.article').click(function() { 

         $(document).keypress(function(event) {


@zystvan @leonhard.wettengmx.n it's working now! thank you both :smile: