Develop Reference

$(...).cells is undefined in jQuery

i have two forms, form1 contains the date and the display button, the show button allows you to hide the form1 and display the form2, the form2 contains the chosen date and a datatable with checkboxes and button valider, i want when i click the show button console show matricules of salaries.
$(document).ready(function() {
$('#check_all').on('click', function(e) {
if ($(this).is(':checked', true)) {
$(".checkbox").prop('checked', true);
} else {
$(".checkbox").prop('checked', false);
}
});
$('.checkbox').on('click', function() {
if ($('.checkbox:checked').length == $('.checkbox').length) {
$('#check_all').prop('checked', true);
} else {
$('#check_all').prop('checked', false);
}
});
$("#form2").hide();
$("#hide").click(function() {
$("#form1").hide();
$("#form2").show();
let dat = $("#dateS").val();
$("#da").text(dat);
$("tr").each(function(i, r) {
let mat = $(r).cells[2].innerText;
console.log(mat);
});
});
})
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<!-- form 1 -->
<div id="form1">
<div class=" col-md-10 col-md-offset-1">
<div class="form-group col-md-3">
<label for="titre">date</label>
</div>
<div class="form-group col-md-5">
<input type="date" name="dateS" id="dateS" class="form-control">
</div>
</div>
<div class="col-md-6 col-md-offset-3">
<div class="form-group col-md-2">
<button class="btn btn-primary" id="hide" data-url="">show</button>
</div>
</div>
</div>
<!-- form 2 -->
<div id="form2">
<div class="col-md-10 col-md-offset-1">
<h4>dateS : <span id="da"></span></h4>
</div>
<table class="table table-bordered" id="mytable">
<tr>
<th><input type="checkbox" id="check_all"></th>
<th>nom</th>
<th>matricule</th>
<th>adresse</th>
<th>prime</th>
</tr>
<tr>
<td><input type="checkbox" class="checkbox"></td>
<td>najib</td>
<td>52</td>
<td>tihit</td>
<td><input type="text" name="prime" class="form-control prime" value="0"></td>
</tr>
<tr>
<td><input type="checkbox" class="checkbox"></td>
<td>adil</td>
<td>62</td>
<td>tagmast</td>
<td><input type="text" name="prime" class="form-control prime" value="0"></td>
</tr>
</table>
<div class="form-group col-md-offset-5 ">
<button class="btn btn-success add-all" type="submit" id="hide">valider</button>
</div>
</div>

Instead of $(r).cells[2].innerText use jQuery
$(r).find('td').eq(2).text()
or:
$(this).find('td:eq(2)').text();
cells is used in vanilla JavaScript to get the cells from TableRowElement, while your $(r) is a reference to a collection of elements wrapped into a jQuery object
therefore if you want to use JavaScript you still can, but like:
r.cells[2].textContent
also, notice the use of the preferred textContent vs innerText

Cloning a tr and it is appearing at the top instead of at the placement of the tr defined

My tr is defined inside the table tag like this:
<table>
<tr>
<td>
<input type="text" name="customerid">
</td>
</tr>
<tr>
<td>
<div id="stlineitems">
<label for="stlineitems">Item(s)</label>
</td>
<td>
<div class="onlyleft">
<select name="get_Items" id="get_Items" class="selectItemsList" data-rule-required="true" data-msg-required="Choose Item">
<option></option>
</select>
</div>
<div class="moveboxleft">
<input type="text" class="inputwidth form-control rates_input" name="rate_items" data-rule-required="true" data-msg-required="Provide Rate or if not, provide 0 value" />
</div>
<br/>
<div class="nextitem">New Item
</div>
</td>
</tr>
</table>
Now, I am using the following snippet to create the cloned above code, all work but the placement is not right, I want it to be creating underneath the tr tag before this <div class="nextitem"> tag, not sure what I am doing wrong here
$('.createNewItemTag').click(function(){
var obj = $(this).parents('tr').first(),
clonedObj = $(obj[0].outerHTML);
clonedObj.find(".select2-container").remove();
clonedObj.find('.createNewItemTag').remove();
clonedObj.find('td').last().append("<a class='removeItem' href='javascript:void(0)';>Remove</a>");
clonedObj.find(".removeItem").click(function(){
$(this).parents('tr').first().remove();
});
console.log(obj);
obj.parents('table').append(clonedObj);
initSelect2ForNextItem(clonedObj.find(".selectItemsList").first());
});

If I understand your question, you want new cloned <tr> elements to be added BEFORE the element with the "new item" tag.
What we are going to do is utilize jQuery's built in .clone() method instead of doing it ourself. Once we have the cloned object we use your existing code to remove the New Item button and add the Remove button.
After we do that we'll utilize jQuery's .before() method to insert the new, cloned element before the original object. (You could use .after() if you wanted this to be inserted after the original object)
$('.createNewItemTag').click(function(){
var obj = $(this).parents('tr').first();
var clonedObj = obj.clone();
clonedObj.find(".select2-container").remove();
clonedObj.find('.createNewItemTag').remove();
clonedObj.find('td').last().append("<a class='removeItem' href='javascript:void(0)';>Remove</a>");
clonedObj.find(".removeItem").click(function(){
$(this).parents('tr').first().remove();
});
obj.before(clonedObj);
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<table>
<tr>
<td>
<input type="text" name="customerid">
</td>
</tr>
<tr>
<td>
<div id="stlineitems">
<label for="stlineitems">Item(s)</label>
</div>
</td>
<td>
<div class="onlyleft">
<select name="get_Items" id="get_Items" class="selectItemsList" data-rule-required="true" data-msg-required="Choose Item">
<option></option>
</select>
</div>
<div class="moveboxleft">
<input type="text" class="inputwidth form-control rates_input" name="rate_items" data-rule-required="true" data-msg-required="Provide Rate or if not, provide 0 value" />
</div>
<br/>
<div class="nextitem">New Item
</div>
</td>
</tr>
</table>
You may also want to clear the inputs of the original object so that it is empty after the clone is created. (or clear the inputs of the cloned object, up to you).
References:
https://api.jquery.com/clone/
https://api.jquery.com/after/

Try below code
Use obj.parents('table').find("tr:eq(0)").after(clonedObj); instead of obj.parents('table').append(clonedObj);
$('.createNewItemTag').click(function() {
var obj = $(this).parents('tr').first(),
clonedObj = $(obj[0].outerHTML);
clonedObj.find(".select2-container").remove();
clonedObj.find('.createNewItemTag').remove();
clonedObj.find('td').last().append("<a class='removeItem' href='javascript:void(0)';>Remove</a>");
clonedObj.find(".removeItem").click(function() {
$(this).parents('tr').first().remove();
});
//console.log(obj);
obj.parents('table').find("tr:eq(0)").after(clonedObj);
//initSelect2ForNextItem(clonedObj.find(".selectItemsList").first());
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<table>
<tr>
<td>
<input type="text" name="customerid">
</td>
</tr>
<tr>
<td>
<div id="stlineitems">
<label for="stlineitems">Item(s)</label>
</td>
<td>
<div class="onlyleft">
<select name="get_Items" id="get_Items" class="selectItemsList" data-rule-required="true" data-msg-required="Choose Item">
<option></option>
</select>
</div>
<div class="moveboxleft">
<input type="text" class="inputwidth form-control rates_input" name="rate_items" data-rule-required="true" data-msg-required="Provide Rate or if not, provide 0 value" />
</div>
<br/>
<div class="nextitem">New Item</div>
</td>
</tr>
</table>
Js Fiddle Demo : JSFiddle

Something like this?
$(document).on('click', '.createNewItemTag', function() {
var rw = $(this).parents('tr');
var ix = rw.index() +1; //remove +1 to insert above curr row
var obj= rw.clone();
obj.addClass('newcol').find('td:first-child').text('New Item');
$('table tr:nth-child('+ix+')').after(obj);
});
table{border-collapse:collapse;}
th,td{border:1px solid #ccc;}
.newcol td{background-color:palegreen;}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<table>
<tr>
<td colspan="2"><input type="text" value="customerid"></td>
</tr>
<tr>
<td>
<div id="stlineitems"><label for="stlineitems">Item(s)</label></div>
</td>
<td>
<div class="onlyleft">
<select>
<option>Options go here</option>
</select>
</div>
<div class="moveboxleft">
<input type="text" value="Provide Rate" />
</div>
<br/>
<div class="nextitem">New Item
</div>
</td>
</tr>
</table>
Notes:
(1) Switched to using .on() to allow newly added rows to be cloned

hide and show div with jquery not working

I am trying to hide div normally but show as user click on drop downlist
but not working jquery
<div class="form-group">
<label>Select Course</label>
<select name="timepass" class="custom-select">
<option>Select</option>
<option id="cour">Php Developer</option>
<option>Asp.Net</option>
<option>Python</option>
</select>
</div>
<div class="mj_tabcontent mj_bottompadder80" id="std-list">
<table class="table table-striped">
<tr>
<td>
<h4>Mudassir Abbas</h4>
</td>
</td>
<td>
<div class="col-xs-2">
<input type="text" placeholder="Grade" class="grade">
</div>
</td>
</tr>
<td>
<h4>Ziab u Nisa</h4>
</td>
<td>
<div class="col-xs-2">
<input type="text" placeholder="Grade" class="grade">
</div>
</td>
</tr>
</tr>
<td>
<h4>Raja M.Waleed</h4>
</td>
<td>
<div class="col-xs-2">
<input type="text" placeholder="Grade" class="grade">
</div>
</td>
</tr>
</table>
</div>
java script code is
<script>
$($document).ready(function(){
$("#std-list").hide();
$("#cour").click( function(){
$("#std-list").show();
});
});
</script>

$(document).ready(function(){
$("#hide").click(function(){
$("p").hide(1000);
});
$("#show").click(function(){
$("p").show(1000);
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.0/jquery.min.js"></script>
<p>If you click on the "Hide" button,<br> I will disappear.</p>
<button id="hide">Hide</button>
<button id="show">Show</button>

Below code as per my understanding. Please check, i hope it's help you..
$(document).ready(function(){
$('.custom-select').change(function(){
if($(".custom-select option:selected").index() == 1){
$('#std-list').show();
}else{
$('#std-list').hide();
}
});
});

When I pass to another radio button both buton's values come

I want to do two radio buttons. Their names will be car and home. If I click car, an input box about the car section will be shown and if I click home, an input box about the home will be shown.
I have found an example about this and I have a problem about it. The codes are below.
<body>
<script type="text/javascript">
function toggleMe(obj, a)
{
var e=document.getElementById(a);
if(!e)return true;
e.style.display="block"
return true;
}
function toggleMe2(obj, a)
{
var e=document.getElementById(a);
if(!e)return true;
e.style.display="none"
return true;
}
</script>
<form name="theForm">
Type<br>
<input type="radio" name="married" value="yes" onclick="return toggleMe(this, 'Car')"> Car
<input type="radio" name="married" value="yes" onclick="return toggleMe(this, 'Home')"> Home<br>
<div id="Car" style="display: none; margin-left: 20px;">
<table>
<tr>
<td>Car InputBox</td>
<td style="text-align: right;"><input name="name" type="text"></td>
</tr>
</table>
</div>
<div id="Home" style="display: none; margin-left: 20px;">
<table>
<tr>
<td>Home InputBox:</td>
<td style="text-align: right;"><input name="name" type="text"></td>
</tr>
</table>
</div>
</form>
</body>
Output of these codes
If I click the car first, the input box of the car section is shown. If I click the home first, the input box of the home section is shown. After I click the car or home first (doesn't matter) if I click another one, both input boxes are shown.
How can I solve this problem? When I click home, the home input box should be shown and when I click car, the car input box should be shown as well. Not both of them.

HTML
<div>
<input type="radio" name="option" value="car" onclick="toggleInput(this)" /> Car
<input type="radio" name="option" value="home" onclick="toggleInput(this)" /> Home
</div>
<div id="car-input-group" class="hide">
Car InputBox
<input name="name" type="text" />
</div>
<div id="home-input-group" class="hide">
Home InputBox
<input name="name" type="text" />
</div>
Javascript
function toggleInput(obj){
var a =document.getElementsByClassName("hide");
for(var i=0; i<a.length; i++){
a[i].style.display = "none";
}
document.getElementById(obj.value + "-input-group").style.display = "block"
}
css
.hide{
display: none
}
Working example: http://plnkr.co/edit/wPdTldCXG0LTJWEtzIxE?p=preview

What about this? Using jquery it's easier. I made it universal, so you could add more radio buttons (using myradio and myinput css classes) without touching the JS.
$( "input.myradio" ).click(function() {
$( "div.myinput").hide();
$( "div#"+$(this).attr('id')).toggle( "slow", function() {
// Animation complete.
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<form name="theForm">
Type<br>
<input id="Car" type="radio" name="married" class="myradio" value="yes" />Car
<input id="Home" type="radio" name="married" class="myradio" value="yes" />Home<br>
<div id="Car" class="myinput" style="display: none; margin-left: 20px;">
<table>
<tr>
<td>Car InputBox</td>
<td style="text-align: right;"><input name="name" type="text"></td>
</tr>
</table>
</div>
<div id="Home" class="myinput" style="display: none; margin-left: 20px;">
<table>
<tr>
<td>Home InputBox:</td>
<td style="text-align: right;"><input name="name" type="text"></td>
</tr>
</table>
</div>
</form>
JSFiddle

How to get the div current text box using jquery

I have multiple div's with text box want to get the each div input box value and display it into that div itself
HTML :
<div id="product_data" class="ui-sortable">
<div class="clonedInput" id="add_attribute" style="display: block;">
<div id="add_attributes">
<div id="accordion1">
<h3>
<input type="button" value="Remove" class="btnDel remove_row button" name="btnDelete1">
<strong class="attribute_name"></strong> </h3>
<table cellspacing="0" cellpadding="0" id="attribute_data" class="">
<tbody>
<tr>
<td class="attribute_name"><label>Name:</label>
<input type="text" id="attribute_name" class="attribute_name" name="attribute_names[]">
</td>
<td rowspan="3"><label>Value(s):</label>
<textarea name="attribute_values[]" cols="5" rows="5" placeholder="Enter some text, or some attributes"></textarea>
</td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
<div class="clonedInput" id="add_attribute_2" style="display: block;">
<div id="add_attributes" class="woocommerce_attribute wc-metabox ">
<div id="accordion1">
<h3>
<input type="button" value="Remove" class="btnDel remove_row button" name="btnDelete1">
<strong class="attribute_name"></strong> </h3>
<table cellspacing="0" cellpadding="0" id="attribute_data" class="">
<tbody>
<tr>
<td class="attribute_name"><label>Name:</label>
<input type="text" id="attribute_name" class="attribute_name" name="attribute_names[]">
</td>
<td rowspan="3"><label>Value(s):</label>
<textarea name="attribute_values[]" cols="5" rows="5" placeholder="Enter some text, or some attributes"></textarea>
</td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
<div class="clonedInput" id="add_attribute_3" style="display: block;">
<div id="add_attributes" class="woocommerce_attribute wc-metabox ">
<div id="accordion1">
<h3>
<input type="button" value="Remove" class="btnDel remove_row button" name="btnDelete1">
<strong class="attribute_name"></strong> </h3>
<table cellspacing="0" cellpadding="0" id="attribute_data" class="">
<tbody>
<tr>
<td class="attribute_name"><label>Name:</label>
<input type="text" id="attribute_name" class="attribute_name" name="attribute_names[]">
</td>
<td rowspan="3"><label>Value(s):</label>
<textarea name="attribute_values[]" cols="5" rows="5" placeholder="Enter some text, or some attributes"></textarea>
</td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
</div>
I'm trying to get the input field value "id = attribute_name" and display the value into the " " on blur function and this was dynamic text box

$( "input" ).blur(function() {
var string = $(this).val();
$(this).parent().append(string);
});
This will append the text on removing the cursor from the input . Style it as your requirement. Atleast it should give you an idea of what to do.
http://jsfiddle.net/L4UQJ/

try this..
$("input[type='text']").on('blur', function () {
alert($(this).val());
});

Finally It's working :)
$( "input" ).blur(function() {
var string = $(this).val();
$(this).closest('div').find('h3 > strong').html(string);
});
DEMO

Since those HTML elements are generated dynamically, use this below approach.
$(document).on('blur', '#attribute_name', function () {
console.log($(this).val()); //To get the value of the textbox
$(this).val(' ');
});