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jQuery convert element ids into comma seperated string

I have a simple html and jquery script like below, I am trying to get a comma seperated list of data-item-id so would look like...
1,2,3,4,5
var items = $('.container').children();
console.log(items);
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="container">
<div class="item" data-item-id="1">Item 1</div>
<div class="item" data-item-id="2">Item 2</div>
<div class="item" data-item-id="3">Item 3</div>
<div class="item" data-item-id="4">Item 4</div>
<div class="item" data-item-id="5">Item 5</div>
</div>
I have grabbed the items but how can I convert this into the comma seperated string?

Map each item to its item-id, then join by commas:
var items = $('.container')
.children()
.map(function() { return $(this).data('item-id') })
.get()
.join(',');
console.log(items);
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="container">
<div class="item" data-item-id="1">Item 1</div>
<div class="item" data-item-id="2">Item 2</div>
<div class="item" data-item-id="3">Item 3</div>
<div class="item" data-item-id="4">Item 4</div>
<div class="item" data-item-id="5">Item 5</div>
</div>
But there's no need for a big library like jQuery to accomplish something this trivial, if you want:
const items = Array.from(
document.querySelectorAll('.container > .item'),
div => div.dataset.itemId
)
.join(',');
console.log(items);
<div class="container">
<div class="item" data-item-id="1">Item 1</div>
<div class="item" data-item-id="2">Item 2</div>
<div class="item" data-item-id="3">Item 3</div>
<div class="item" data-item-id="4">Item 4</div>
<div class="item" data-item-id="5">Item 5</div>
</div>

Because who wouldn't want to add destructuring as well ..... (Kudos to CertainPerformance)
const items = Array.from(
document.querySelectorAll('.container > .item'),
({ dataset: { itemId: i } }) => i
)
.join(',');
console.log(items);
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="container">
<div class="item" data-item-id="1">Item 1</div>
<div class="item" data-item-id="2">Item 2</div>
<div class="item" data-item-id="3">Item 3</div>
<div class="item" data-item-id="4">Item 4</div>
<div class="item" data-item-id="5">Item 5</div>
</div>

Another alternative with JQuery could be using .each() to traverse the items while grabbing the data-item-id with .data() and adding it to a string.
$(document).ready(function()
{
var itemList = "";
$('.container .item').each(function()
{
itemList += $(this).data('item-id') + ",";
});
console.log("Ids:", itemList.slice(0,-1));
});
.as-console {background-color:black !important; color:lime;}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="container">
<div class="item" data-item-id="1">Item 1</div>
<div class="item" data-item-id="2">Item 2</div>
<div class="item" data-item-id="3">Item 3</div>
<div class="item" data-item-id="4">Item 4</div>
<div class="item" data-item-id="5">Item 5</div>
</div>

You can also apply some features of ES5 and ES6 for a shorter solution. And without jQuery.
let itemsIds = [...document.getElementsByClassName("item")]
.map(elem => elem.getAttribute("data-item-id"))
.join(',');
console.log(itemsIds);
<div class="container">
<div class="item" data-item-id="1">Item 1</div>
<div class="item" data-item-id="2">Item 2</div>
<div class="item" data-item-id="3">Item 3</div>
<div class="item" data-item-id="4">Item 4</div>
<div class="item" data-item-id="5">Item 5</div>
</div>

Show and Hide Div With Matching Class Name On Click

I am still getting to grips with jQuery and wondered if anyone had a suggestion for this?
Basically on click I want to show the div with the matching class, so if you click the btn with class '.project1' then it should show the content div with the same class of '.project1'.
I'm just stuck on how it would find this so any suggestions would be awesome :)
Thanks in advance.
Snippet:
$('div[class*="project"]').click(function (e) {
$(this).closest('.content').show();
});
.content {
display: none;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="project1 btn">BTN 1</div>
<div class="project2 btn">BTN 2</div>
<div class="project3 btn">BTN 3</div>
<div class="project4 btn">BTN 4</div>
<div class="project1 content">CONTENT 1</div>
<div class="project2 content">CONTENT 2</div>
<div class="project3 content">CONTENT 3</div>
<div class="project4 content">CONTENT 4</div>
CodePen: https://codepen.io/nickelse/pen/mYrOdz?editors=1111

One option is to use data() to store arbitrary data associated with the matched elements or return the value at the named data store for the first element in the set of matched elements.
$('div[class*="project"]').click(function (e) {
var project = $(this).data("project"); //Get the data-project of the clicked element
$(".content.project" + project).toggle(); //Toggle the element with content and project class
});
.content {
display: none;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="project1 btn" data-project="1">BTN 1</div> <!-- Add data-project on HTML-->
<div class="project2 btn" data-project="2">BTN 2</div>
<div class="project3 btn" data-project="3">BTN 3</div>
<div class="project4 btn" data-project="4">BTN 4</div>
<div class="project1 content" data-project="1">CONTENT 1</div>
<div class="project2 content" data-project="2">CONTENT 2</div>
<div class="project3 content" data-project="3">CONTENT 3</div>
<div class="project4 content" data-project="4">CONTENT 4</div>

You need to find the project number you clicked on.
You can do that by filtering the classes of the button you clicked on and extracting the number :
+[...this.classList].find(c => c.startsWith('project')).replace('project', '');
Then all you have to do is toggle the targeted project content :
$('.content.project'+project).toggle();
Here's a working example:
$('div[class^="project"]').on('click', function(){
const project = +[...this.classList].find(c => c.startsWith('project')).replace('project', '');
$('.content.project'+project).toggle();
});
.content {
display: none;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="project1 btn">BTN 1</div>
<div class="project2 btn">BTN 2</div>
<div class="project3 btn">BTN 3</div>
<div class="project4 btn">BTN 4</div>
<div class="project1 content">CONTENT 1</div>
<div class="project2 content">CONTENT 2</div>
<div class="project3 content">CONTENT 3</div>
<div class="project4 content">CONTENT 4</div>

Toggling based on class matching is one of the harder thing to do in JQuery, however to achieve what you require you could do the following:
/* When a btn is clicked */
$('.btn').click(function(e) {
/* Extract the classes of this button element */
const classes = $(this).attr('class');
/* Parse the project class part of the classes string */
const projectClass = classes.match(/project\d+/)[0];
/* Construct a matcher for the projects corresponding
content and "toggle" the content's visiblity */
$('.content.' + projectClass).toggle();
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.0.0/jquery.min.js"></script>
<div class="project1 btn">BTN 1</div>
<div class="project2 btn">BTN 2</div>
<div class="project3 btn">BTN 3</div>
<div class="project4 btn">BTN 4</div>
<div class="project1 content">CONTENT 1</div>
<div class="project2 content">CONTENT 2</div>
<div class="project3 content">CONTENT 3</div>
<div class="project4 content">CONTENT 4</div>

You can try to use regex to the class started with "project" and then show or hide it
$('.btn').click(function (e) {
var classArray = $(this).attr("class"),
re = /^project[0-9]+/ ,
className = re.exec(classArray)[0];
$('.content.'+ className).toggle();
});
$('.btn').click(function (e) {
var classArray = $(this).attr("class"),
re = /^project[0-9]+/ ,
className = re.exec(classArray)[0];
$('.content.'+ className).toggle();
});
.content {
display: none
}
.btn {
cursor:pointer
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="project1 btn">BTN 1</div>
<div class="project2 btn">BTN 2</div>
<div class="project3 btn">BTN 3</div>
<div class="project4 btn">BTN 4</div>
<div class="project1 content">CONTENT 1</div>
<div class="project2 content">CONTENT 2</div>
<div class="project3 content">CONTENT 3</div>
<div class="project4 content">CONTENT 4</div>

insertAdjacentHTML not inserting passed string correctly

I want to insert html after a particular element but insertAdjacentHTML wont let me add a closing tag first.
If I do
elm.insertAdjacentHTML('afterend', '</div><section class="block">');
the expected result is
<element></element></div><section class="block">
the result it's returning
<element></element><section class="block"></div>
Is there a way around this?
Edit:
Basically what i'm trying to do is loop through each element and split them into two divs
<div class="column">
<div class="block">block 1</div>
<div class="block">block 2</div>
<div class="block">block 3</div>
<div class="block">block 4</div>
<div class="block">block 5</div>
<div class="block">block 6</div>
<div class="block">block 7</div>
<div class="block">block 8</div>
</div>
Expected result
<div class="column">
<div class="block">block 1</div>
<div class="block">block 2</div>
<div class="block">block 3</div>
<div class="block">block 4</div>
</div>
<div class="column">
<div class="block">block 5</div>
<div class="block">block 6</div>
<div class="block">block 7</div>
<div class="block">block 8</div>
</div>
JS
const blocks = document.querySelectorAll(".block");
let half = Math.ceil(blocks.length / 2 - 1);
blocks[half].insertAdjacentHTML('afterend', '</div><div class="column">');

If I get your requirement right, this is what you want to do:
elm.parentNode.insertAdjacentHTML('afterend', '<section class="block"></section>');
If the div is not the direct parent element, you might want to use Element.closest(selector) instead:
elm.closest('div.myDiv').insertAdjacentHTML('afterend', '<section class="block"></section>');
update
You have elaborated on your requirements further, this is how to do it in Javascript:
const blocks = [...document.querySelectorAll('.block')];
const middle = Math.ceil(blocks.length / 2 - 1);
const column = document.querySelector('.column');
const parent = document.querySelector('.parent');
const col1 = document.createElement('div');
col1.className = 'column';
const col2 = document.createElement('div');
col2.className = 'column';
blocks.forEach((block, index) => {
if (index <= middle) {
col1.appendChild(block)
} else {
col2.appendChild(block)
}
})
parent.removeChild(column)
parent.appendChild(col1);
parent.appendChild(col2);
.column+.column {
color: green;
}
<div class="parent">
<div class="column">
<div class="block">block 1</div>
<div class="block">block 2</div>
<div class="block">block 3</div>
<div class="block">block 4</div>
<div class="block">block 5</div>
<div class="block">block 6</div>
<div class="block">block 7</div>
<div class="block">block 8</div>
</div>
</div>
Resulting DOM:

Scrollable tbody issue

: )
I know this question has been asked a lot, but I tried many solutions and just couldn't make it work properly.
I need to make the tbody of my table scrollable with fixed headers.
To start my table is built dynamically and is very large. 19 columns and about 800 rows.
First I worked with the jquery datatables plugin.
After the table is in the container:
var tbl = createFilter('readDataTbl', '', condition);
$('#tableDiv').empty().append(tbl);
$('#readDataTbl').dataTable({
"scrollY": "200px",
"scrollCollapse": true,
"paging": false
});
but that creates a scroll in x and the headers are frozen like that:
Then I tried a css solution as follows:
<style>
table {
border-collapse: collapse;
width: 100%;
}
thead {
text-align:left;
display: table;
float: left;
width: 100%;
}
thead tr {
display: table-row;
width: 100%;
}
tbody {
display: block;
height: 120px;
overflow: auto;
float: left;
width: 100%;
}
tbody tr {
display: table;
width: 100%;
}
tbody tr {
height: 18px;
}
tbody td {
padding:1px 8px;
}
th, td {
width: 25%;
}
tr:after{ /* IE8 fix */
content: ".";
margin-left: -3px; /* to hide the content above tr */ /* not necessary if you are ok with 1px gap */
visibility: hidden;
}
</style>
But that just creates a mess in the tbody like that:
Then I tried thie method from Here
adjusting the THs width after:
css:
<style>
thead, tbody { display: block; }
tbody {
height: 100px; /* Just for the demo */
overflow-y: auto; /* Trigger vertical scroll */
overflow-x: hidden; /* Hide the horizontal scroll */
}
</style>
js:
var tbl = createFilter('readDataTbl', '', condition);
$('#tableDiv').empty().append(tbl);
var $table = $('table');
var $bodyCells = $table.find('tbody tr:first').children();
// Get the tbody columns width array
var colWidth = $bodyCells.map(function () {
return $(this).width();
}).get();
// Set the width of thead columns
$table.find('thead tr').children().each(function (i, v) {
$(v).width(colWidth[i]);
});
And then I noticed the THs long text made them bigger like that:
what could help me achieve my goal?
Thought about inserting divs inside THs but not sure about it..
Thanks! : ]

You can't do this perfectly without some javascript. The best way to accomplish this would be to use a clone of the header, prepend it to the element, apply a fixed position on it and hide the original. Hope this helps. You might also need to bind each column width to the width of the original.

I think you can use bootstrap css and some table styles. You can adjust the th height and width for better results. Also you must calculate the percentage width of tbody td, thead th { ie if you have 19 columns then 100/19 which is around 5%. So your column width will be very less and you will need to increase the height for thead th {
table {
width: 100%;
}
thead,
tbody,
tr,
td,
th {
display: block;
}
tr:after {
content: ' ';
display: block;
visibility: hidden;
clear: both;
}
thead th {
height: 50px;
/*text-align: left;*/
}
tbody {
height: 120px;
overflow-y: auto;
}
thead {
/* fallback */
}
tbody td,
thead th {
width: 19.2%;
float: left;
}
<link href="http://netdna.bootstrapcdn.com/bootstrap/3.0.3/css/bootstrap.min.css" rel="stylesheet" />
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<table class="table table-striped">
<thead>
<tr>
<th>Make fg jfdg jfgj fgjfg jfgj fgj fgj g jfgj fgj dfgj fgjfg</th>
<th>Model</th>
<th>Color</th>
<th>Year</th>
</tr>
</thead>
<tbody>
<tr>
<td class="filterable-cell">Fordfghdfg jfdgjfdgj fgj fdgj fgjfgj df</td>
<td class="filterable-cell">Escort</td>
<td class="filterable-cell">Blue</td>
<td class="filterable-cell">2000</td>
</tr>
<tr>
<td class="filterable-cell">Ford</td>
<td class="filterable-cell">Escort</td>
<td class="filterable-cell">Blue</td>
<td class="filterable-cell">2000</td>
</tr>
<tr>
<td class="filterable-cell">Ford</td>
<td class="filterable-cell">Escort</td>
<td class="filterable-cell">Blue</td>
<td class="filterable-cell">2000</td>
</tr>
<tr>
<td class="filterable-cell">Ford</td>
<td class="filterable-cell">Escort</td>
<td class="filterable-cell">Blue</td>
<td class="filterable-cell">2000</td>
</tr>
</tbody>
</table>

You can do this with the help of flex-box layout. It certainly won't work on safari though. All other major browsers render it perfectly.
/* CSS */
html, body {
height: 100%;
width: 100%;
overflow: hidden;
margin: 0;
padding: 0;
}
.table {
height: 100%;
width: 100%;
}
.table .tr {
display: flex;
flex-flow: row wrap;
}
.table .tr .td, .table .tr .th {
flex: 1;
}
.table .thead {
padding-right: 17px;
/* this padding accounts for the width of the scroll bar
* you could compute the default scrollbar width for any browser and set this padding accordingly
* else the headers and records will be misaligned by that margin. */
}
.table .viewport {
height: 640px;
overflow: scroll;
}
/* HTML */
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<link rel="stylesheet" type="text/css" href="ftable.css" />
<title>Flex tables</title>
</head>
<body>
<div class="table">
<div class="thead">
<div class="tr">
<div class="th">Column 1</div>
<div class="th">Column 2</div>
<div class="th">Column 3</div>
<div class="th">Column 4</div>
<div class="th">Column 5</div>
</div>
</div>
<div class="viewport tbody">
<div class="canvas">
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
<div class="tr">
<div class="td">Value 1</div>
<div class="td">Value 2</div>
<div class="td">Value 3</div>
<div class="td">Value 4</div>
<div class="td">Value 5</div>
</div>
</div>
</div>
</div>
</body>
</html>

Wrap groups of elements using jQuery

I've got a list of elements and I want to group them with div starting with the first element and ends with BREAK class then start a new group after the class BREAK.
So the code below,
<div class="test">Test 0</div>
<div class="test">Test 1</div>
<div class="break">Break 0</div>
<div class="test">Test 2</div>
<div class="test">Test 3</div>
<div class="break">Break 1</div>
<div class="test">Test 4</div>
<div class="test">Test 5</div>
<div class="test">Test 6</div>
Would become,
<div>
<div class="group">
<div class="test">Test 0</div>
<div class="test">Test 1</div>
<div class="break">Break 0</div>
</div>
<div class="group">
<div class="test">Test 2</div>
<div class="test">Test 3</div>
<div class="break">Break 1</div>
</div>
<div class="group">
<div class="test">Test 4</div>
<div class="test">Test 5</div>
<div class="test">Test 6</div>
<div class="break">Add last break element</div>
</div>
<div>
And append a div element in the last group.
Any ideas? Thanks in advance.

I'd probably go with simple: Loop through them with a container you add to, add a new container every time you see break:
var div;
$("selector for the divs").each(function() {
if (!div) {
div = $("<div>").insertBefore(this);
}
div.append(this);
if ($(this).hasClass("break")) {
div = undefined;
}
});
if (div) {
$("<div>last break</div>").addClass("break").appendTo(div);
}
Example (I added a wrapper class so we could see the effect when adding):
$("#go").click(function() {
var div;
$("#container > div").each(function() {
if (!div) {
div = $("<div>").addClass("wrapper").insertBefore(this);
}
div.append(this);
if ($(this).hasClass("break")) {
div = undefined;
}
});
if (div) {
$("<div>last break</div>").addClass("break").appendTo(div);
}
});
.test {
color: blue;
}
.break {
color: red;
}
.wrapper {
border: 1px solid #aaa;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<input type="button" id="go" value="Go">
<div id="container">
<div class="test">Test 0</div>
<div class="test">Test 1</div>
<div class="break">Break 0</div>
<div class="test">Test 2</div>
<div class="test">Test 3</div>
<div class="break">Break 1</div>
<div class="test">Test 4</div>
<div class="test">Test 5</div>
<div class="test">Test 6</div>
</div>

I think you can also do something like this: first you insert one more .break to all .test parent container, then using wrapAll method wrap groups properly:
$('.test').parent().append('<div class="break">Break 2</div>').
find('.test + .break').each(function() {
$(this).prevUntil('.break, .group').add(this).wrapAll('<div class="group"></div>');
});
.group {
padding: 3px;
background: #BFECBE;
margin-bottom: 2px;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="container">
<div class="test">Test 0</div>
<div class="test">Test 1</div>
<div class="break">Break 0</div>
<div class="test">Test 2</div>
<div class="test">Test 3</div>
<div class="break">Break 1</div>
<div class="test">Test 4</div>
<div class="test">Test 5</div>
<div class="test">Test 6</div>
</div>

this code is working fine,you can check the fiddle and demo here as well
$("div.test").each(function() {
if (!$(this).nextAll(".break").length)
$(".test").last().after('<div class="break">Add last break element</div>');
if (!$(this).parents(".group").length)
$(this).add($(this).nextUntil('.break+.test').andSelf()).wrapAll('<div class="group" />');
});
.group {
background: red;
margin: 10px;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="test">Test 0</div>
<div class="test">Test 1</div>
<div class="break">Break 0</div>
<div class="test">Test 2</div>
<div class="test">Test 3</div>
<div class="break">Break 1</div>
<div class="test">Test 4</div>
<div class="test">Test 5</div>
<div class="test">Test 6</div>
});
Fiddle Demo