Is my way good? Or.. it's just a longer bit of code? And also.. can anyone explain to me how this stuff work 'nextSlide.length == 0'?


no errors

var main = function() {
    $('.dropdown-toggle').click(function() {
    $('.arrow-next').click(function() {
        var currentSlide = $('.active-slide');
        var nextSlide =;
        var currentDot = $('.active-dot');
        var nextDot =;
        if(nextSlide.length == 0) {
            nextSlide = $('.slide').first();
        if(nextDot.length == 0) {
            nextDot = $('.dot').first();




I think it is better, if one understands the concept.

It all start's with you,
using a Browser
in which you load a HTML-file,
which we will call the HTML-Document.

This document has a minimal build of

<!DOCTYPE html>
          <title> </title>
       <!-- here you insert your HTML-code -->

The Browser =load's= this document into Memory
in a pattern that is described as
the Document Object Model
in short the DOM.
( the interpretation of the DOM is Browser & Version specific )

       |            |
     head          body

In the description of your document in DOM-talk...
you will encounter terms like:
parent children sibling descendants ascendants...

The HTML-Element has no parent
but is a parent to 2 child-Element's
the 'head'-Element
the 'body'-Element.

The 'head'- and 'body'-Element,
both being children to the 'html'-Element
are siblings to each-other.

The 'head'-Element is parent to the 'title'-Element...
the 'title'-Element is a child of the 'head'-Element
the 'title'-Element is also a descendant of the 'html'-Element.

The DOM has several interface's
over which you can access the data**/**information
held by the DOM.

One of the interface's is the Element-interface
you can divide the interface into
properties ( consisting of a property-key and it's associated VALUE )
methods ( giving you the functionality to manipulate the Elements )


++ jquery length explained AND DOM pictures of flipboard


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