I don't get where the error is "Previous dot 1"


#1

var main = function() {

$('.dropdown-toggle').click(function() {
$('.dropdown-menu').toggle();
});

$('.arrow-next').click(function() {
    var currentSlide = $('.active-slide');
    var nextSlide = currentSlide.next();

   var currentDot = $('.active-dot');
   var nextDot = currentDot.next();

    if(nextSlide.length == 0) {
        nextSlide = $('.slide').first();  
        nextDot = $('.dot').first();
    }
    currentSlide.fadeOut(600).removeClass('active-slide');
    nextSlide.fadeIn(600).addClass('active-slide');

   currentDot.removeClass('active-dot');
   nextDot.addClass('active-dot');

});

   $('.arrow-prev').click(function() {
     var currentSlide = $('.active-slide');
     var prevSlide = currentSlide.prev();

   var currentDot = $('.active-dot');
   var prevDot = currentDot.prev();

    if(prevSlide.length == 0) {
        prevSlide = $('.slide').last();
    }

     currentSlide.fadeOut(600).removeClass('active-slide');
     prevSlide.fadeIn(600).addClass('active-slide');

     currentDot.removeClass('.active-dot');
     prevDot.addClass('.active-dot');

});
}

$(document).ready(main)


#2

@allisapp,

+++++ 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
**$('.article').removeClass('.current')
$(this).addClass('.current')**
into
**$('.article').removeClass('current')
$(this).addClass('current')**

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"

Reference::

google search
class site:jquery.com
https://api.jquery.com/category/selectors/
http://api.jquery.com/class-selector/
https://api.jquery.com/element-selector/
http://www.w3schools.com/jquery/jquery_ref_selectors.asp
http://www.w3schools.com/jquery/trysel.asp

what is CSS explained site:developer.mozilla.org
https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Getting_started/What_is_CSS

= http://stackoverflow.com/questions/1795438/load-and-execution-sequence-of-a-web-page