We Keep Coding

Create row in html table which does not have id and class

I would like to create one additional row in HTML Table which is very common and can be done if we have id or class available of that table.
But in my case I have one page which contains many forms and tables.
But in all those I have one form which contains only one element i.e table and I would like to create one more row and move few columns from 1st row to newly created row.
For this I have created simple HTML page.Please find below code and help me to achieve my output.
<h:form id="myForm">
<table>
<tr>
<td id="col1">Item Info</td>
<td id="col2">Description</td>
<td id="col3">Product</td>
<td id="col4">Keywords</td>
<td id="col5">Documents</td>
<td id="col6">Image</td>
<td id="col7">Video</td>
</tr>
</table>
</h:form>
Here Ia m getting output like
Item Info Description Product Keywords Documents Image Video
But I want to achieve something like below:
Item Info Description Product Keywords
NEW CELL1 Documents Image Video
means I would like to remove few columns from existing row and I would like to add it in newly created row.
For this I have written Javascript like:
<script type="text/javascript">
window.onload = function() {
split();
};
function split() {
var form = document.getElementById("myForm");
var table = form.elements[0];
var tr = document.createElement("tr");
tr.id="row2";
table.appendChild(tr);
var cell = tr.insertCell(0);
cell.innerHTML = "NEW CELL1";
var col5 = document.getElementById("col5");
tr.appendChild(col5);
var col6 = document.getElementById("col6");
tr.appendChild(col6);
var col7 = document.getElementById("col7");
tr.appendChild(col7);
}
</script>
Here, My problem is this entire form will be generated automatically so I can't give the Id for the table and with this script it is not identifying my table when I am giving form.elemets[0];
I want to find table element so that I can create row in that table.

You can find the table by doing this:
Get one of the elements in a table row, and get the parent node until you've got the table. In this case you could do document.getElementById('col1').parentNode.parentNode
And just to ease things,
You can insert this string '</tr><tr>' in a row, after a table cell, to easily create a new row.
This should be better than document.getElementsByTagName('table'), because if you have lots of tables which are far away, it will take more time to find your table's index in that array.

Use getElementsByTagName to get the table from within your form, which has an ID
window.onload = function() {
split();
};
function split() {
var form = document.getElementById("myForm");
var table = form.getElementsByTagName("table")[0];
var tr = document.createElement("tr");
tr.id = "row2";
table.appendChild(tr);
var cell = tr.insertCell(0);
cell.innerHTML = "NEW CELL1";
/*Your original code produces duplicate IDs which is a BAD thing*/
var col5 = document.getElementById("col5");
/*Update new Id*/
col5.id += "_new";
tr.appendChild(col5);
var col6 = document.getElementById("col6");
/*Update new Id*/
col6.id += "_new";
tr.appendChild(col6);
var col7 = document.getElementById("col7");
/*Update new Id*/
col7.id += "_new";
tr.appendChild(col7);
}
<form id="myForm">
<table>
<tr>
<td id="col1">Item Info</td>
<td id="col2">Description</td>
<td id="col3">Product</td>
<td id="col4">Keywords</td>
<td id="col5">Documents</td>
<td id="col6">Image</td>
<td id="col7">Video</td>
</tr>
</table>
</form>
You also have a mismatch of column numbers, with the code provided you originally have 7 columns and only insert 4, this will produce inconsistent results, make sure to use the colspan attribute as needed.

You should be able to use JavaScript's querySelector method to select the table data you want to remove from the document.
Something like var rowToDeleteOrAddTo = document.querySelector("#myForm > table > tr > td"); should help you get there. You'll need to lookup CSS Selectors to get the specific selectors you need. You may need to use the textContent property once you have a node to make sure you are deleting the right one.

DataTables issue: VM9075 dataTables.min.js:24Uncaught TypeError: Cannot set property '_DT_CellIndex' of undefined

I just started using DataTables and everything works fine when creating the table.
When I display 5, 24, 47 rows in my table, DataTables behaves as I would expect.
But I have this table that has around 700 rows and I get the error in Google Chrome,
"VM9075 dataTables.min.js:24Uncaught TypeError: Cannot set property '_DT_CellIndex' of undefined "
and in IE 9,
"SCRIPT5007: Unable to set value of the property '_DT_CellIndex': object is null or undefined
jquery-1.10.2.min.js, line 4 character 2367"
I don't have jQuery included twice btw.
I'm not sure how to proceed from here.
I tried to use the unminified version of the .js file to debug it more myself but i kept getting an "ext" method or property is undefined and couldn't fix that either.
Any help is appreciated!

I figured it out
The biggest issue was not knowing exactly what this error actually meant.
In my case it meant "the number of every <td> element in your table that is a child of a <tr> element doesn't match the number of <th> elements that are a child of the <thead> element."
My table was being generated by the server, and some of the <tr> elements had 27 <td> children (which was filling the whole width of the table up, but some of the <tr> elements only had 3, 4, or 5, ... <td> child elements which isn't a valid table.
I solved it by adding empty <td> elements in my table for the <tr> elements that lacked the correct number of <td> elements
var makeTableValidObject = {
thisWasCalled: 0,
makeTableValid: function() {
var tableToWorkOn = document.getElementById("table1");
//check the number of columns in the <thead> tag
//thead //tr //th elements
var numberOfColumnsInHeadTag = tableToWorkOn.children[1].children[0].children.length;
var numberOf_trElementsToValidate = tableToWorkOn.children[2].children.length;
//now go through each <tr> in the <tbody> and see if they all match the length of the thead columns
//tbody //all trs//all tds elements
//tableToWorkOn.children[2].children.children);
for(var i = 0; i < numberOf_trElementsToValidate; i++) {
//row my row make sure the columns have the correct number of elements
var tdColumnArray = tableToWorkOn.children[2].children[i].children
var trElementToAppendToIfNeeded = tableToWorkOn.children[2].children[i];
if(tdColumnArray.length != numberOfColumnsInHeadTag) {
//since they don't match up, make them valid
if(tdColumnArray.length < numberOfColumnsInHeadTag) {
//add the necessary number of blank <td> tags to the <tr> element to make this <tr> valid
var tdColumnArrayLength = tdColumnArray.length;
for(var j = 0; j < (numberOfColumnsInHeadTag - tdColumnArrayLength); j++) {
var blank_tdElement = document.createElement("td");
blank_tdElement.id = "validating_tdId" + i + "_" + j;
trElementToAppendToIfNeeded.appendChild(blank_tdElement);
}
}
else {
//TODO: remove <td> tags to make this <tr> valid if necessary
}
}
}
}
};
Edit 1:
It has been awhile and this question is still getting a bunch of views. I have since updated the code.
I replaced the first line of code with the second line to be more general
var numberOfColumnsInHeadTag = tableToWorkOn.children[1].children[0].children.length;
var numberOfColumnsInHeadTag = tableToWorkOn.querySelectorAll('thead')[0].querySelectorAll('th');
Pretty much where ever in the prior code you see the children.children I replaced that with the querySelectorAll(...) Function.
It uses css selectors which makes it amazingly powerful.
stay blessed

Ran into this same issue and implemented this same solution (essentially) in jquery based on Coty's. Hope this helps someone. :)
$( '.table' ).each(function( i ) {
var worktable = $(this);
var num_head_columns = worktable.find('thead tr th').length;
var rows_to_validate = worktable.find('tbody tr');
rows_to_validate.each( function (i) {
var row_columns = $(this).find('td').length;
for (i = $(this).find('td').length; i < num_head_columns; i++) {
$(this).append('<td class="hidden"></td>');
}
});
});

As answered by Coty, the problem lies in the mismatch of td elements generated in the header and body of table.
I'd like to highlight one of the reasons why it can occur (For .Net Users).
If Page numbers are being displayed at the end of gridview, they can disrupt table structure.
Remove AllowPaging="true" from your gridview to solve this.
And no worries because Datatable handles Paging.

you always keep four column but sometimes you will receive or append null td or only one td, td count always match with total column so when you does not have record then make td as following.
<th>No</th>
<th>Name</th>
<th>place</th>
<th>Price</th>
----------------------------------------
<td colspan="4">Data not found.</td>
<td style="display: none;"></td>
<td style="display: none;"></td>
<td style="display: none;"></td>

this error can also be triggered if you try to set options for the responsive extension for more columns than you have.

$( '.table' ).each(function( i ) {
var worktable = $(this);
var num_head_columns = worktable.find('thead tr th').length;
var rows_to_validate = worktable.find('tbody tr');
rows_to_validate.each( function (i) {
var row_columns = $(this).find('td').length;
for (i = $(this).find('td').length; i < num_head_columns; i++) {
$(this).append('<td class="hidden"></td>');
}
});
});

Handling the table from a html form with javascript

<table id="production">
<tr>
<th>Product Name</th>
<td></td>
<td>elementsdefined</td>
</tr>
<tr>
<th>Product Name</th>
<td></td>
<td>elementsdefined</td>
</tr>
</table>
Product Name:
Product Quanitity:
Add
function updateForm() {
var prdn = document.getElementById("prodname").value;
var prdq = document.getElementById("prodquantity").value;
var table = document.getElementById("production");
var rows = table.rows;
var cell1 = rows[0].insertCell(-1);
var cell2 = rows[1].insertCell(-1);
cell1.innerHTML = prdn;
cell2.innerHTML = prdq;
}
I need someone help me understand how I can insert data in separate column in database; suppose I have a table of three rows and three columns, columns are created by using td tags, now in the first and last columns elements are predefined and so any data should insert in the second column of the table after clicking the button. because the code above is inserting the data in raw cells by default.
i am adding the fiddle here
http://jsfiddle.net/3e7rh/2/

As you can see here, you need to add in the last - 1 column.
http://jsfiddle.net/3e7rh/8/
function updateForm() {
var prdn = document.getElementById("prodname").value;
var prdq = document.getElementById("prodquantity").value;
var table=document.getElementById("production");
var rows=table.rows;
var cell1=rows[0].insertCell(rows[0].cells.length - 1);
var cell2=rows[1].insertCell(rows[1].cells.length - 1);
cell1.innerHTML=prdn;
cell2.innerHTML=prdq;
}
Update:
http://jsfiddle.net/3e7rh/10/
function updateForm() {
var prdn = document.getElementById("prodname").value;
var prdq = document.getElementById("prodquantity").value;
var table=document.getElementById("production");
var rows=table.rows;
var cell1=rows[0].cells[1].textContent=prdn;
var cell2=rows[1].cells[1].textContent=prdq;
}

Get the table. Iterate over all rows and fill in the first td (Because you are using th as the first one)
var table = document.getElementById("production")
rows = table.getElementsByTagName("tr");
for(var i=0;i<rows.length;i++)
{
columns = rows[i].getElementsByTagName("td");
columns[0].textContent="text"; //First Td second column in your case
}
Jsfiddle:http://jsfiddle.net/7xs6v/1/
I am assuming you want to fill the same text in every first td(second column). If you want individual then you can use the index specificallyinstead of iterating over for loop

How to make a table with rows that can be copied (adding a new row after that one, containing the same) with Javascript?

I am trying to make a table containing several rows, each with a button in the last cell that creates a copy of the row.
All the other cells contains an input (text).
The content (value) of the inputs that are added must be the same as the one above (the one they are copies of).
The copies cannot be copied however!
The inputs must have a unique name something like this:
1-1-name
1-1-age
1-1-country
1-1-email
and if this row is copied, the copied inputs must have names like this
1-2-name
1-2-age
1-2-country
1-2-email
The next one with 3 instead of 2, and so on.
The problem with this, I guess, is that I must do this without JQuery. I can only use Javascript. Is this even possible?

Take a look at this fiddle. Here is a pure js (no-jQuery) way to duplicate a table row and increment it's ID:
var idInit;
var table = document.getElementById('theTable');
table.addEventListener('click', duplicateRow); // Make the table listen to "Click" events
function duplicateRow(e){
if(e.target.type == "button"){ // "If a button was clicked"
var row = e.target.parentElement.parentElement; // Get the row
var newRow = row.cloneNode(true); // Clone the row
incrementId(newRow); // Increment the row's ID
var cells = newRow.cells;
for(var i = 0; i < cells.length; i++){
incrementId(cells[i]); // Increment the cells' IDs
}
insertAfter(row, newRow); // Insert the row at the right position
idInit++;
}
}
function incrementId(elem){
idParts = elem.id.split('-'); // Cut up the element's ID to get the second part.
idInit ? idParts[1] = idInit + 1 : idInit = idParts[1]++; // Increment the ID, and set a temp variable to keep track of the id's.
elem.id = idParts.join('-'); // Set the new id to the element.
}
function insertAfter(after, newNode){
after.parentNode.insertBefore(newNode, after.nextSibling);
}​
<table id="theTable">
<tr id="1-1">
<td id="1-1-name"><input type="text"/></td>
<td id="1-1-age"><input type="text"/></td>
<td id="1-1-country"><input type="text"/></td>
<td id="1-1-email"><input type="text"/></td>
<td id="1-1-button"><input type="button" value="Copy"/></td>
</tr>
</table>​
Edit: Updated to insert the new row after the clicked one. Now with buttons and inputs!

Yes this is possible,
you should create a new table row ,
then set its innerHTML to the innerHTML of the row above.
jQuery is a JavaScript library, which means it is built with JavaScript functions.
So everything you can do with jQuery, you can do with JavaScript too.
Léon

Hide a column in a javascript populated table

I would like to hide the entire age column on this table.
<table id="displayTable">
<tr>
<td class="Name"></td>
<td class="Phone"></td>
<td class="Age"></td>
</tr>
</table>
Javascript follows to hide Age cell -
var table = document.getElementById('displayTable');
var tableRow = table.getElementsByTagName('tr');
for (var row = 0; row < tableRow.length; row++) {
var cells = tableRow[row].getElementsByTagName('td')
cells[2].style.display='none';
}
error says -
"2.style is null or not an object."
What am I missing?

Well, first of all, check your table id. You have it set to 'displayTable' but you're attempting to look it up by 'displayLossTable'.
When i fix that id, and plug your code into jsFiddle, everything works.

what does alert(cells[2]) give you? Alternatively you should try add/remove class instead of inline styles:
el.className+= 'hide'