We Keep Coding

How to view multiple tables through dropdown menu?

How can I have 2 or more tables on 1 page with only viewing 1 table at the time with dropdown menu you choose which table to show without a button or refreshing the page? Does anyone have an idea? Atleast we need to use ajax/js. I use datatables plugin for my tables. Here is a Fiddle
<select>
<option value='table1'>table1</option>
<option value='table2'>table2</option>
</select>

You can use jquery hide/show method to do the same.
Please take a look at the fiddle
Below code handles showing/hiding of tables
$(function() {
$('#table1').wrap('<div id="hidetable1" class="hide" style="display:none"/>');
$('#table2').wrap('<div id="hidetable2" class="hide" style="display:none"/>');
$('#table3').wrap('<div id="hidetable3" class="hide" style="display:none"/>');
$('#table1').DataTable( {
"searching": true
} );
$('#table2').DataTable( {
"searching": true
} );
$('#table3').DataTable( {
"searching": true
} );
console.log($("#drop"))
$("#hide"+ $("#drop")[0].value).show();
$("#drop").change(function () {
var end = this.value;
$('.hide').hide();
$("#hide"+end).show();
});
});

You can do it by making an onchange function, giving ids to the table and displaying table according to the value like this
function display(val){
document.getElementById(val).style.display = "block";
val== "table1"?document.getElementById("table2").style.display = "none":document.getElementById("table1").style.display = "none";;
}
#table2{
display:none;
}
<select onchange = "display(this.value)">
<option value='table1' selected>table1</option>
<option value='table2'>table2</option>
</select>
<table border='1' id="table1">
<thead>
<tr>
<th>ID</th>
<th>Name</th>
<th>Edit</th>
<th>Delete</th>
</tr>
</thead>
<tbody>
<tr>
<td>1</td>
<td>john</td>
<td>Edit</td>
<td>Delete</td>
</tr>
</tbody>
</table>
<table border='1' id="table2">
<thead>
<tr>
<th>ID</th>
<th>type</th>
<th>Edit</th>
<th>Delete</th>
</tr>
</thead>
<tbody>
<tr>
<td>1</td>
<td>Male</td>
<td>Edit</td>
<td>Delete</td>
</tr>
</tbody>
</table>
If you have more than two tables, you can simply do it by adding a class
function display(val){
var el = document.getElementsByClassName("allTables");
for(i=0; i<el.length; i++) {
el[i].style.display = "none";
}
document.getElementById(val).style.display = "block";
}
.allTables{
display:none;
}
#table1{
display:block;
}
<select onchange = "display(this.value)">
<option value='table1' selected>table1</option>
<option value='table2'>table2</option>
<option value='table3'>table3</option>
</select>
<table border='1' id="table1" class="allTables">
<thead>
<tr>
<th>ID</th>
<th>Name</th>
<th>Edit</th>
<th>Delete</th>
</tr>
</thead>
<tbody>
<tr>
<td>1</td>
<td>john</td>
<td>Edit</td>
<td>Delete</td>
</tr>
</tbody>
</table>
<table border='1' id="table2" class="allTables">
<thead>
<tr>
<th>ID</th>
<th>type</th>
<th>Edit</th>
<th>Delete</th>
</tr>
</thead>
<tbody>
<tr>
<td>1</td>
<td>Male</td>
<td>Edit</td>
<td>Delete</td>
</tr>
</tbody>
</table>
<table border='1' id="table3" class="allTables">
<thead>
<tr>
<th>ID</th>
<th>type</th>
<th>Edit</th>
<th>Delete</th>
</tr>
</thead>
<tbody>
<tr>
<td>4</td>
<td>Male</td>
<td>Edit</td>
<td>Delete</td>
</tr>
</tbody>
</table>

Initially set any one table which you want to display and make all the others hide. Then pass the selected table id to the onchange propery then hide all the other tables. To get all the tables which we want to hide, group it under a class name.
function show(){
var selectedTable= document.getElementById("drp").value;
var elements = document.getElementsByClassName('tableClass')
for (var i = 0; i < elements.length; i++){
if(elements[i].id==selectedTable)
elements[i].style.display = '';
else
elements[i].style.display = 'none';
}
}
<select onchange="show(value)" id="drp">
<option value='table1'>table1</option>
<option value='table2'>table2</option>
</select>
</br></br>
<table border='1' id="table1" class="tableClass">
<thead>
<tr>
<th>ID</th>
<th>Name</th>
<th>Edit</th>
<th>Delete</th>
</tr>
</thead>
<tbody>
<tr>
<td>1</td>
<td>john</td>
<td>Edit</td>
<td>Delete</td>
</tr>
</tbody>
</table>
<table border='1' id="table2" class="tableClass" style="display:none;">
<thead>
<tr>
<th>ID</th>
<th>type</th>
<th>Edit</th>
<th>Delete</th>
</tr>
</thead>
<tbody>
<tr>
<td>1</td>
<td>Male</td>
<td>Edit</td>
<td>Delete</td>
</tr>
</tbody>
</table>

DataTables: Uncaught TypeError: Cannot read property 'mData' of undefined

I want to display table using DataTable in my page :
<table id="example" class="display" cellspacing="0" width="100%">
<thead>
<tr>
<th>Username</th>
<th>Firstname</th>
<th>Lastname</th>
<th>Phone</th>
<th>Password</th>
<th></th>
</tr>
</thead>
<tfoot>
<tr>
<th>Username</th>
<th>Firstname</th>
<th>Lastname</th>
<th>Phone</th>
<th>Password</th>
<th></th>
<th></th>
</tr>
</tfoot>
<tbody>
<c:forEach items="${users}" var="user" varStatus="status">
<tr>
<form>
<td class="text-center">${user.getUsername()}</td>
<td class="text-center">${user.getFirstname()}</td>
<td class="text-center">${user.getLastname()}</td>
<td class="text-center">${user.getPhone()}</td>
<td class="text-center">${user.getPassword()}</td>
</form>
<td class="text-center"><button class="btn btn-user" onclick="show('block','${user.getUsername()}')">Delete</button></td>
<td class="text-center"><button class="btn btn-user" onclick="show2('block','${user.getFirstname()}','${user.getLastname()}','${user.getUsername()}', '${user.getPhone()}','${user.getPassword()}')">Edit</button></td>
</tr>
</c:forEach>
</tbody>
</table>
But I get error: Uncaught TypeError: Cannot read property 'mData' of undefined
How can I solve this problem ?

I solved my probem : missing <th></th> in <thead>

Why is this datatable showing no result when for a mobile number?

I have a datatable in which I am putting my data. You can see the code below. I want you to notice that; the code will work perfectly right now. However, when you uncomment the Mobile# from the code & then try searching using profile-ids (8 or 12); it doesn't show the records as it shows without mobile number. I am wondering why.
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<link rel="stylesheet" href="https://cdn.datatables.net/1.10.10/css/jquery.dataTables.min.css">
<script src="https://cdn.datatables.net/1.10.10/js/jquery.dataTables.min.js"></script>
<script>
$(function() {
$(".datatable").DataTable();
});
</script>
<table class="datatable table table-bordered table-striped">
<thead>
<tr>
<th>Profile id</th>
<th>Name</th>
<th>Surname</th>
<!-- <th>Mobile#</th>-->
</tr>
</thead>
<tfoot>
<tr>
<th>Profile id</th>
<th>Name</th>
<th>Surname</th>
<!-- <th>Mobile#</th>-->
</tr>
</tfoot>
<tbody>
<tr>
<td>1</td>
<td>John</td>
<td>Keller</td>
<!--<td>12123123</td>-->
</tr>
<tr>
<td>2</td>
<td>Donald</td>
<td>Duck</td>
<!-- <td>12123123</td>-->
</tr>
</tbody>
</table>
Fiddle link ... : Fiddle link

This works for me. I cannot see any issues in Chrome at least
I can search for phone 1,2,3, and id 8 to find John, phone 4,5,6 and id 9 to find Duck
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<link rel="stylesheet" href="https://cdn.datatables.net/1.10.10/css/jquery.dataTables.min.css">
<script src="https://cdn.datatables.net/1.10.10/js/jquery.dataTables.min.js"></script>
<script>
$(function() {
$(".datatable").DataTable();
});
</script>
<table class="datatable table table-bordered table-striped">
<thead>
<tr>
<th>Profile id</th>
<th>Name</th>
<th>Surname</th>
<th>Mobile#</th>
</tr>
</thead>
<tfoot>
<tr>
<th>Profile id</th>
<th>Name</th>
<th>Surname</th>
<th>Mobile#</th>
</tr>
</tfoot>
<tbody>
<tr>
<td>8</td>
<td>John</td>
<td>Keller</td>
<td>123</td>
</tr>
<tr>
<td>9</td>
<td>Donald</td>
<td>Duck</td>
<td>456</td>
</tr>
</tbody>
</table>

It seems that the search fields searches in all td elements if it contains that value, possibly using regular expressions for this?
I haven't worked with DataTables, but is there a way to set which field it should check in? That would most likely solve your problem.
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<link rel="stylesheet" href="https://cdn.datatables.net/1.10.10/css/jquery.dataTables.min.css">
<script src="https://cdn.datatables.net/1.10.10/js/jquery.dataTables.min.js"></script>
<script>
$(function() {
$(".datatable").DataTable();
});
</script>
<table class="datatable table table-bordered table-striped">
<thead>
<tr>
<th>Profile id</th>
<th>Name</th>
<th>Surname</th>
<th>Mobile#</th>
</tr>
</thead>
<tfoot>
<tr>
<th>Profile id</th>
<th>Name</th>
<th>Surname</th>
<th>Mobile#</th>
</tr>
</tfoot>
<tbody>
<tr>
<td>1</td>
<td>John</td>
<td>Keller</td>
<td>12123123</td>
</tr>
<tr>
<td>2</td>
<td>Donald</td>
<td>Duck</td>
<td>23232323</td>
</tr>
</tbody>
</table>

Traversing DOM in a table

I have an HTML table that has a delete button in each row of its last column. By clicking on one of these buttons, I would like to be able to delete the whole row in which it is situated. The follow code deletes the button itself but I am unable to get it to delete the whole row:
var bns = document.getElementsByTagName("button");
for (var i = 0; i < bns.length; i++) {
bns[i].addEventListener("click", function()
{
this.parentNode.parentNode.removeChild(this);
});
}
My HTML looks like:
<body>
<table class="table">
<thead>
<tr>
<th>Students</th>
</tr>
<tr>
<th>First Name</th>
<th>Last Name</th>
<th>Email</th>
<th>Delete</th>
</tr>
</thead>
<tbody>
<tr>
<td>John</td>
<td>Doe</td>
<td>john#doe.us</td>
<td><button>X</button></td>
</tr>
<tr>
<td>John</td>
<td>Doe</td>
<td>john#doe.us</td>
<td><button>X</button></td>
</tr>
</tbody>
</table>

I think it's the removeChild(this) that's the problem. That's being called on the <tr> but it's telling it to delete this which is the button.
Try:
var row = this.parentNode.parentNode;
row.parentNode.removeChild(row);
Alternatively with a framework such as jQuery it would be:
$(this).parent().parent().remove();
Edit
The complete jQuery code is actually nice and short, too:
$(document).ready(function(){
$('button').click(function(){
$(this).parents('tr').remove();
});
});

You can use HTMLTableElement.deleteRow()to delete a HTML table row. I have added an onclick event to each button and it will call deleteRow function which uses rowIndex & deleteRow().It do not require jquery to perform the action
HTML
<table class="table" id="table">
<thead>
<tr>
<th>Students</th>
</tr>
<tr>
<th>First Name</th>
<th>Last Name</th>
<th>Email</th>
<th>Delete</th>
</tr>
</thead>
<tbody>
<tr>
<td>John</td>
<td>Doe</td>
<td>john#doe.us</td>
<td><button onclick="deleteRow(this)">X</button></td>
</tr>
<tr>
<td>John</td>
<td>Doe</td>
<td>john1#doe.us</td>
<td><button onclick="deleteRow(this)">X</button></td>
</tr>
</tbody>
</table>
JS
function deleteRow(r) {
var i = r.parentNode.parentNode.rowIndex;
document.getElementById("table").deleteRow(i);
}
DEMO HERE

How to find which th child has the particular class for a table using jquery?

How to find which th child has the class 'nosort' for the table with 'normal-sort-table' class using jquery ? I want to alert column number of th with 'nosort' class.
<table class="normal-sort-table">
<thead>
<tr>
<th>#</th>
<th>First Name</th>
<th>Last Name</th>
<th class="nosort">Username</th>
</tr>
</thead>
<tbody>
<tr>
<td>1</td>
<td>Mark</td>
<td>Otto</td>
<td>mark246</td>
</tr>
</tbody>
</table>
<script>
$( document ).ready(function() {
if ( $('.normal-sort-table tr th').hasClass( "nosort" ) ) {alert( 'column-number-with-nosort-class-alert-here' )}
})
</script>

you can use jq .index() method:
$('.normal-sort-table tr th.nosort').index()

alert($("th").index($(".nosort")));

If you want to exact column number then you have write
alert($('th.nosort').index()+1);
becuase index starting from zero.
alert($('th.nosort').index());
alert($('th.nosort').index()+1);
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<table class="normal-sort-table">
<thead>
<tr>
<th>#</th>
<th>First Name</th>
<th>Last Name</th>
<th class="nosort">Username</th>
</tr>
</thead>
<tbody>
<tr>
<td>1</td>
<td>Mark</td>
<td>Otto</td>
<td>mark246</td>
</tr>
</tbody>
</table>