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Two dynamic class added on same element at same time

In my bootstrap website I added fullpage.js, so when a dynamically one class want to add to the page. But two dynamic class added on same element at same time.
So it changed the functionality.
One class only add to the element.
I tried but didn't worked.
Can you please help me to solve this problem.
This is my code, in this code(fp-tableCell) class added two times
<section class="icon-section fp-section fp-table active" id="section-1">
<div class="fp-tableCell" style="height:600px;">
<div class="fp-tableCell" style="height:600px;">
<div class="container">
<div class="row">
<div class="col-md-9 col-sm-12 col-xs-12">
<img src="images/product-1.png" alt="img" class="max-width">
</div>
<div class="col-md-5 col-sm-12 col-xs-12 banner-txt">
<h3 class="preHeading"">volant</h3>
<h1 class="mainHeading">an icon for iconoclasts</h1>
<p class="description">Our singular purpose was to create a product not<br>
bound by convention.
Volant is the realization of that<br> dream.</p>
</div>
</div>
</div>
</div>
</div>
</section>

The code that generates the two <div> elements appears to have been minified and is therefore very difficult to interpret. I think the easiest way to solve this problem would be to remove the duplicate <div> elements from all of the <section> elements after the document has loaded. To do this, you can insert the following code just before your closing </body> tag:
<script>
var sectionElems = document.getElementsByTagName("section"); //creates an array containing all <section> elements
var outerDiv;
var innerDiv;
//loop through each <section> element found and remove duplicate <div> element
for(var i = 0; i < sectionElems.length; i++){
outerDiv = sectionElems[i].children[0];
innerDiv = outerDiv.children[0];
//check class names to make sure it is a duplicate element
if(outerDiv.className == innerDiv.className){
outerDiv.innerHTML = innerDiv.innerHTML;
}
}
</script>
This code loops through each <section> element and writes the content of the nested <div> element into the parent <div> element, basically overwriting itself without including the nested <div> element.

How to know the order number of the child element selected in relation to its parent?

I have a html structure like the following:
<div id="first">
<div id="second">
<div class="inside"></div>
<div class="inside"></div>
<div class="inside"></div>
<div class="inside"></div>
<div class="inside"></div>
</div>
</div>
And the following javascript / jquery code:
$(".inside").mouseover(function(ev){
var el = ev.currentTarget;
//TODO: get real element
var el_position = 1;
});
What I want to do is check the number of ".inside" that is being hovered with the mouse. So, if I hover the first entry of ".inside" it should display "1". In the fourth it should display "4". But accessing the variable "el" (ev.currentTarget) has no "element position" property or anything of the alike that would allow me to understand the position of the actual hovered element in relation to "#second" (the first, second, third, etc .inside).
So, does anyone have any idea? Can I get some help? Thank you very much :)

You can use .index() which returns the 0-based index of the element within a collection
$(".inside").mouseover(function(ev) {
var el = ev.currentTarget;
//TODO: get real element
var el_position = $(el).index(".inside") + 1;
console.log(el_position);
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js">
</script>
<div id="first">
<div id="second">
<div class="inside">1</div>
<div class="inside">2</div>
<div class="inside">3</div>
<div class="inside">4</div>
<div class="inside">5</div>
</div>
</div>

jquery clone a link (once per div)

I have a set of divs, and need to clone the link from the top and insert into the last div (mobile-link). It is either cloning the links from all of the divs, and then inserting all of them at once, or if I use :eq(0), it's putting the first link into all of the divs.
<div class="course">Accounting</div>
<div class="start-date">1-1-2017</div>
<div class="credits">4</div>
<div class="location">Online</div>
<div class="mobile-link"></div>
<div class="course">Business</div>
<div class="start-date">1-1-2017</div>
<div class="credits">3</div>
<div class="location">Online/Campus</div>
<div class="mobile-link"></div>
<script>
$(".course a:eq(0)").clone().appendTo(".mobile-link");
</script>
What do I need to change to make this work properly?

You need to process each anchor separately:
$(".course").each(function() {
var myLink = $(this).find('a').clone();
$(this).nextAll('.mobile-link').first().append(myLink);
});
Demo fiddle

Append method can take a function as argument, and here it is appending to the each .mobile-link first <a> from his previous .course div
$(".mobile-link").append(function(){
return $(this).prevAll('.course:first').find('a:first').clone();
});
Check the below snippet
$(".mobile-link").append(function(i) {
return $(this).prevAll('.course:first').find('a:first').clone();
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="course">Accounting
</div>
<div class="start-date">1-1-2017</div>
<div class="credits">4</div>
<div class="location">Online</div>
<div class="mobile-link"></div>
<div class="course">Business
</div>
<div class="start-date">1-1-2017</div>
<div class="credits">3</div>
<div class="location">Online/Campus</div>
<div class="mobile-link"></div>

I beleive that you should use last (If I understood question correctly):
var lastDiv = $(".mobile-link").last();
$(".course a:eq(0)").clone().appendTo(lastDiv);
Here is jsfiddle: fiddle

Reorder divs in javascript without jquery

lets say I have html:
<div id="1">1</div>
<div id="2">2</div>
<div id="3">3</div>
how would I in javascript and not jquery reorder these divs to:
<div id="1">1</div>
<div id="3">3</div>
<div id="2">2</div>

You can use display:flex and the order css (I had to add a letter before the number for your id as SO didn't seem to like it for the css)
.container {display:flex; flex-direction:column}
#s1 {order:1;}
#s2 {order:3;}
#s3 {order:2;}
<div class="container">
<div id="s1">1</div>
<div id="s2">2</div>
<div id="s3">3</div>
</div>
More information about order
More information about flex
Update
Sorry read the question wrong - thought you wanted to do it without js
var div = document.getElementById('3')
div.parentNode.insertBefore(div, document.getElementById('2'))
<div id="1">1</div>
<div id="2">2</div>
<div id="3">3</div>

The solution given by the duplicate questions are incorrect because they make the assumption that the elements are next to each other. But even in this simple example, there is a text node containing white-space between the elements.
Given that the two elements are not nested, you can use this to swap two elements:
function swapElements (first, second) {
var tmpNode = document.createElement('div');
tmpNode.setAttribute('id', '_tmp');
var firstParent = first.parentNode;
firstParent.insertBefore(tmpNode, first);
second.parentNode.insertBefore(second, first);
firstParent.insertBefore(second, tmpNode);
firstParent.removeChild(tmpNode);
}
Use it like:
var first = document.querySelector('#1');
var second = document.querySelector('#2');
swapElements(first, second);

jQuery Insert closing div tag and opeing div tag after count

I am trying to get jquery to close a div and inset an opening div with a class after x amount of items.
Here is what I have tried:
$(this).after('</div> <div class=\"bar">Bar');
it outputs:
<div class="bar">Bar</div>
What I need is:
<div class="item2">
<div class="CountThese2"> Count Me </div>
<div class="CountThese2"> Count Me </div>
</div>
<div class="bar">
<div class="CountThese2"> Count Me </div>
<div class="CountThese2"> Count Me </div>
</div>
<div class="bar">
<div class="CountThese2"> Count Me </div>
<div class="CountThese2"> Count Me </div>
</div>
<div class="bar">
<div class="CountThese2"> Count Me </div>
<div class="CountThese2"> Count Me </div>
</div>
http://jsfiddle.net/yoderman94/JEtj2/

You can't add half a tag. I think what you're trying to do is wrap the elements. Your fiddle is pretty messy, but here's a simple example of how you can do that:
http://jsfiddle.net/9Q62H/
while($('#wrapper > a:lt(2)').wrapAll('<div class="bar">bar</div>').length) { }
Which turns this:
<div id="wrapper">
1
1
1
1
1
1
1
1
</div>
into this:
<div id="wrapper">
<div class="bar">bar
1
1
</div>
<div class="bar">bar
1
1
</div>
<div class="bar">bar
1
1
</div>
<div class="bar">bar
1
1
</div>
</div>

You can't manipulate the DOM that way, with or without jQuery. To accomplish the same thing, insert a new div after the current div's parent, and then move all of the current div's following siblings to the new div:
var bar = $("<div>").addClass("bar").text("Bar");
bar.insertAfter($(this).parent());
bar.append($(this).nextAll());
Edit: To preserve text nodes, including the whitespace between your links, it's not quite as simple as $(this).nextAll(), sadly. You need to use .contents() to select the text nodes, then slice at the index of this:
var contents = $(this).parent().contents();
var bar = $("<div>").addClass("bar").text("Bar");
bar.insertAfter($(this).parent());
bar.append(contents.slice(contents.index(this) + 1));
http://jsfiddle.net/JEtj2/6/

I'm going to recommend a different approach here. When you call .after() you need to be giving it a complete open and close tag. You cannot open a tag then close it later like you are trying to above.
My advice would be to try and take an approach like the following, so you can pass a complete open and close tag to .after()
var theDiv = "<div class='bar'>";
for(var i = 0; i < 2; i++) {
theDiv += '<div class="CountThese2"> Count Me </div>';
}
theDiv += "</div>";
$('#thing').after(theDiv);
See how I constructed the whole div including contents before calling .after() ?