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#1

I really don't know what I did wrong, the the followed the instructions.

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();
}

$('.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();
prevDot = $('.dot').last();
}

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

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

$(document).ready(main);


#2

@s.kim1990,

++ the build of FLIPBOARD script ++

The structure of the =main= function should look like

var main = function() {
     //Begin of =main= FUNCTION-BODY
        $('.dropdown-toggle').click(function(){
              $('.dropdown-menu').toggle();
        });

        $('.arrow-next').click( function() {
             //code which gets executed when =click=ed
        });
        $('.arrow-prev').click( function() {
             //code which gets executed when =click=ed
        });
     //End of =main= FUNCTION-BODY
};

And the =main= function should be executed when the document is fully loaded and READY

$(document).ready( main );

======================================

+++++ flipboard the next && prev steps

s t e p s - - f o r - - n e x t S l i d e
-1
-1a create a selection of nextSlide (2 steps, capture 'active-slide, capture next() slide )'
-1b create a selection of nextDot
-2 check if selection of nextSlide is EMPTY
-2a if EMPTY change nextSlide selection to first slide
-2b and change nextDot selection to first Dot
-3 swap -active-slide- and -active-dot- class from current to next
Step3 is done by

   currentSlide.fadeOut(600).removeClass('active-slide');
   nextSlide.fadeIn(600).addClass('active-slide');
   currentDot.removeClass('active-dot');
   nextDot.addClass('active-dot');

s t e p s - - f o r - - p r e v S l i d e
-1
-1a create a selection of prevSlide
-1b create a selection of prevDot
-2 check if selection of prevSlide is EMPTY
-2a if EMPTY change prevSlide selection to last slide
-2b and change prevDot selection to last Dot
-3 swap -active-slide- and -active-dot- class from current to prev
Step3 is done by

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

+++++++++++++++++++++++++++++++++++++
++ jquery length explained AND DOM pictures of flipboard
https://www.codecademy.com/forum_questions/5615308ab62548021c0000e4


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