Develop Reference

Add row and td element and a checkbox in the table

I have the following table structure
<form method=POST class='form leftLabels'>
<table >
<tr >
<th >Code:</th>
<td ><input type='text' name='f[id]' size='60' value='10' /></td>
</tr>
<tr ><th >Name:</th>
<td ><input type='text' name='f[name]' size='60' value='Aa' /></td>
</tr>
// <<<< Here I would like to add a row
<tr >
<td class=' nogrid buttonsClass'><button type=submit>Save</button>
</td>
</tr>
</table>
</form>
The row that I am trying to add should have the following html:
<tr>
<th> Delete the record?</th>
<td><input type='checbox' name='delete' value=1></td>
</tr>
I have the following Javascript / jQuery code:
var trCnt=0;
$('table tr').each(function(){
trCnt++;
});
rowToInsertCheckbox = trCnt - 1;
$('table').after(rowToInsertCheckbox).append(
$(document.createElement('tr')),
$(document.createElement('td').html('Delete the record'),
$(document.createElement('td').html('Checkbox here?')),
);
which does find the right row after which the insert should be done, but the code does not work.

after() adds the new content after the target element, but outside it. tr need to be inside the table. In addition you need to append the td to the tr, not the table.
To place the new tr in your target position you can select the last tr in the table and use insertBefore(), like this:
let $newRow = $('<tr />').insertBefore('table tr:last');
$('<td>Delete the record?</td>').appendTo($newRow);
$('<td><input type="checkbox" name="delete" value="1"></td>').appendTo($newRow);
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<form method="POST" class="form leftLabels">
<table>
<tr>
<th>Code:</th>
<td><input type="text" name="f[id]" size="60" value="10" /></td>
</tr>
<tr>
<th>Name:</th>
<td><input type="text" name="f[name]" size="60" value="Aa" /></td>
</tr>
<tr>
<td class="nogrid buttonsClass"><button type="submit">Save</button></td>
</tr>
</table>
</form>

One way to locate the row after which the content should be added is:
var tr = $("th").filter(function () {
return $(this).text() == "Name:";
}).closest("tr");
Then add the row:
$(tr).after("<tr><th> Delete the record?</th><td><input type='checkbox' name='delete' value=1></td></tr>");
$(document).ready(function() {
var tr = $("th").filter(function() {
return $(this).text() == "Name:";
}).closest("tr");
$(tr).after("<tr><th>Delete the record?</th>" +
"<td><input type='checkbox' name='delete' value=1></td>" +
"</tr>");
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<form method=POST class='form leftLabels'>
<table>
<tr>
<th>Code:</th>
<td><input type='text' name='f[id]' size='60' value='10' /></td>
</tr>
<tr>
<th>Name:</th>
<td><input type='text' name='f[name]' size='60' value='Aa' /></td>
</tr>
<tr>
<td class=' nogrid buttonsClass'><button type=submit>Save</button>
</td>
</tr>
</table>
</form>

get value from a table if its checked

I have this piece of code where values are coming from php
<table class="table datatable-basic">
<tr>
<th>-<th>
<th>title<th>
</tr>
//forloop
<tr>
<td><input class="chk" type="checkbox" name="uid[]" id="uid" value="<?php echo $id; ?>"></td>
</tr>
<tr>
<td><?php echo "$title" ?></td>
</tr>
</table>
<button id="go">GO</buton>
So in my jQuery, I want to alert the value of the check box which is id, when I click the button 'go' and when that check box is checked. How can I do this?

You can use this selector input.chk:checked and the function $.toArray to get the selected elements as array and then execute the function map to get the values.
Finally, the function join will create an string with the values from the array separated by comma.
$('#go').on('click', function() {
var selectedValues = $('input.chk:checked').toArray().map(function(chk) {
return $(chk).val();
});
console.log(selectedValues.join());
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<table class="table datatable-basic">
<tr>
<th>title</th>
</tr>
<tr>
<td><input class="chk" type="checkbox" name="uid[]" id="uid" value="111"></td>
</tr>
<tr>
<td><input class="chk" type="checkbox" name="uid[]" id="uid" value="222"></td>
</tr>
<tr>
<td>Title</td>
</tr>
</table>
<button id="go">GO</buton>

There's a problem with your setup - they all have an ID of "uid". IDs must be unique.
But since they have a class you can do this:
var selectedValues = [];
$('input.chk:checked').each(function() {
selectedValues.push($(this).val());
});
The selectedValues array will contain the values of all of the selected checkboxes.
You could then join these together into a string separated by commas with join.
selectedValues.join(',');

To demonstrate the output I have omitted the PHP part from HTML. You can try the following code:
$('#go').click(function(){
var val = '';
$('.chk:checked').each(function(){
val += ', ' + $(this).val();
});
alert(val);
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<table class="table datatable-basic">
<tr>
<th>-<th>
<th>title<th>
</tr>
<tr>
<td><input class="chk" type="checkbox" name="uid[]" id="uid" value="111"></td>
</tr>
<tr>
<td><input class="chk" type="checkbox" name="uid[]" id="uid" value="222"></td>
</tr>
<tr>
<td>Title</td>
</tr>
</table>
<button id="go">GO</buton>

New table row is not creating using JQuery clone method

I have a table in in that table I have a button for adding new row .In that table I want to dynamically add new row when user will click the add row button. I but it is not working. The HTML and JQuery code is there in JSFiddle . Please suggest.
<table id="myTable" border="1">
<tr>
#*<td>SR</td>*#
<td>Name</td>
<td>Age</td>
<td>Delete?</td>
<td>Add</td>
</tr>
<tr>
#*<td>1</td>*#
<td><input size=25 type="text" id="nmbox" /></td>
<td><input size=25 type="text" id="agbox" /></td>
<td><input type="button" id="delRow" value="Delete" onclick="deleteRow(this)" /></td>
<td><input type="button" id="addRow" value="Add " onclick="insRow()" /></td>
</tr>
</table>
var new_row1 = $('#mytable tr:last').clone();
$('#mytable').append(new_row1);

1) id selector mismatched $('#myTable tr:last'). caps T
2) id should be unique for each element .
function insRow(){
var new_row1 = $('#myTable tr:last').clone();
$('#myTable').append(new_row1);
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<table id="myTable" border="1">
<tr>
#*<td>SR</td>*#
<td>Name</td>
<td>Age</td>
<td>Delete?</td>
<td>Add</td>
</tr>
<tr>
#*<td>1</td>*#
<td><input size=25 type="text" /></td>
<td><input size=25 type="text" /></td>
<td><input type="button" value="Delete" onclick="deleteRow(this)" /></td>
<td><input type="button" value="Add " onclick="insRow()" /></td>
</tr>
</table>

To add child elements into cloned one without jQuery:
clone = ElementTo.cloneNode();
while (ElementToBeCloned.firstChild){
clone.appendChild(ElementToBeCloned.lastChild);
}

Add new Id For Text Box inside tr on clone jquery

I have a table and on button click i am adding row using .clone and adding id using .prop now What i want to do is i want to find text boxes with in tr and change ids for it How can i do it
Here is My html
<table class="table purchasemanagement customtabl-bordered " id="tblpurchaseproductdes">
<thead>
<tr>
<th><input type="checkbox" onclick="select_all()" class="check_all"></th>
<th>Product Description*</th>
<th>No's*</th>
<span class="error" id="purchse_no" style="color:red"></span>
<th>Capacity*</th>
<span class="error" id="purchse_errorcapacity" style="color:red"></span>
<th>Quantity</th>
<th>Full/Empty</th>
</tr>
</thead>
<tbody id="puchasedescbody">
<tr class="purchaserow">
<td><input class="case" type="checkbox"></td>
<td>
<select class='form-control drpdwn_pdtdescription' id='drpdwn_pdtdescription' name='pdtdescription'></select>
</td>
<td><input class='form-control pdtdesc_nos' id="no_1" name='nos' /></td>
<td><input class='form-control pdtdesc_capacity' id="capacity_1" name='capacity' /></td>
<td><input class='form-control pdtdesc_qty' id="quantity_1" name='quantity' readonly /></td>
<td><input class='case1 pdtdesc_full' type='checkbox' name='full' checked='checked'></td>
</tr>
</tbody>
</table>
js
$(".purchasemore").on('click', function() {
var cloneCount = 1;
// var row = $(".purchasemanagement tr:last").clone().find(':input').val('').end();
var row = $(".purchasemanagement tr:last").clone().prop('id', 'klon' + cloneCount);
// var test = $(this).find('input[name$="nos"]').attr("id");
// alert(test);
$('.purchasemanagement').append(row);
});
For my code It is Adding id for tr
i want to change id for nos,capacity
Thanks

In your commented code you need to access those elements using :
row.find('.pdtdesc_capacity').attr('id','capacity_' + cloneCount);

Enabled/disabled buttons when one checkbox or more are checked

To do this, I have a javascript file that count how many checkboxes in my form are checked, then:
if nothing is checked, these buttons: Change, delete, reset password will be disabled.
if one is checked, those will be all enabled.
if two or more is checked, Change will be disabled, the rest will still be enabled.
But in reality all of them stay disabled no matter what I do, so I wonder what I did wrong here.
Here is my code:
html:
<form action="" name="tform" method="POST">
<table>
<tr>
<td colspan="2">
</td>
<td colspan="3" align="right">
<input type="text" name="search_value" size="35"/><input type="submit" name="Search_clicked" value="Search"/>
</td>
</tr>
<tr>
<td colspan="5">
<table class="sortable" id="sortable_example" border="2">
<tr>
<th class="unsortable">Select</th>
<th>UserID</th>
<th>User name</th>
<th>Enable/Disable</th>
<th>Start date</th>
<th>End date</th>
</tr>
<tr>
<td><input type="checkbox" name="userid[]" value="1"/></td>
<td>00001</td>
<td>trang</td>
<td>Enable</td>
<td>dd/mm/YYYY</td>
<td>dd/mm/YYYY</td>
</tr> <tr>
<td><input type="checkbox" name="userid[]" value="11"/></td>
<td>00011</td>
<td>trangnt00914#fpt.edu.vn</td>
<td>Enable</td>
<td>dd/mm/YYYY</td>
<td>dd/mm/YYYY</td>
</tr> <tr>
<td><input type="checkbox" name="userid[]" value="12"/></td>
<td>00012</td>
<td>apgs1104#gmail.com</td>
<td>Enable</td>
<td>dd/mm/YYYY</td>
<td>dd/mm/YYYY</td>
</tr> <tr>
<td><input type="checkbox" name="userid[]" value="13"/></td>
<td>00013</td>
<td>congchua_cambuagietchim#yahoo.</td>
<td>Enable</td>
<td>dd/mm/YYYY</td>
<td>dd/mm/YYYY</td>
</tr> <tr>
<td><input type="checkbox" name="userid[]" value="14"/></td>
<td>00014</td>
<td>apgs1234#gmail.com</td>
<td>Enable</td>
<td>dd/mm/YYYY</td>
<td>dd/mm/YYYY</td>
</tr> <tr>
<td><input type="checkbox" name="userid[]" value="15"/></td>
<td>00015</td>
<td>apgs1104#yahoo.com</td>
<td>Enable</td>
<td>dd/mm/YYYY</td>
<td>dd/mm/YYYY</td>
</tr> <tr>
<td><input type="checkbox" name="userid[]" value="16"/></td>
<td>00016</td>
<td>trang1104#gmail.com</td>
<td>Enable</td>
<td>dd/mm/YYYY</td>
<td>dd/mm/YYYY</td>
</tr>
</table>
</td>
</tr>
<tr height="100px">
<td><input type="submit" name="Add_clicked" value="Add"/></td>
<td><input type="submit" name="Add_massively_clicked" value="Add massively"/></td>
<td><input type="submit" name="Change_clicked" disabled value="Change"/></td>
<td><input type="submit" name="Delete_clicked" disabled onclick="return confirm('Are you sure?');" value="Delete"/></td>
<td><input type="submit" name="Reset_password_clicked" disabled onclick="return confirm('Are you sure?');" value="Reset password"/></td>
</tr>
</table>
</form>
and javascript:
var obj;
var count=0;
var Change = document.getElementsByName('Change_clicked')[0];
var Delete = document.getElementsByName('Delete_clicked')[0];
var Reset_password = document.getElementsByName('Reset_password_clicked')[0];
for (var i=0; i<tform.elements.length; i++) {
obj = tform.elements[i];
if (obj.type == "checkbox" && obj.checked) {
count++;
}
}
if(count==0){
Change.disabled=true;
Delete.disabled=true;
Reset_password.disabled=true;
}
if(count==1){
Change.disabled=false;
Delete.disabled=false;
Reset_password.disabled=false;
}
if(count>1){
Change.disabled=true;
Delete.disabled=false;
Reset_password.disabled=false;
}
Thank you for any help!

Your code is fine, the only thing you missed to wrap it to a function and add an event handler.
1) Using onchange event handler, for your checkboxes
example:
<input type="checkbox" onchange="fun()" name="userid[]" value="1"/>
2) Wrap your code to a function like
function fun() {
//add your code
}
See it is working in this JSFiddle

Try instead of using:
<input type="submit" name="Change_clicked" disabled value="Change"/>
just:
<input type="submit" name="Change_clicked" value="Change"/>
for each button and then on document.ready and onclick() event within a checkbox check the amount of enabled check boxes. Then apply your settings from your function.
Also instead of using
var Change = document.getElementsByName('Change_clicked')[0];
just use ids with your elements because they are present only once:
var Change = document.getElementsById('Change_clicked');
Edit: instead of onclick() trigger the function by onChange(), kudos to #Praveen