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Add columns to a new table row in JQuery

I have the following html:
<table id='myTable'>
<tbody>
<tr>
<td id=col1">12</td>
<td id=col2">55</td>
<td id=col3">142</td>
<td id=col4">7</td>
</tr>
</tbody>
</table>
I would like to use JQuery to append everything after column 3 (col3) to a new row. Ideally I would end up with something like this:
<table id='myTable'>
<tbody>
<tr>
<td id=col1">12</td>
<td id=col2">55</td>
<td id=col3">142</td>
</tr>
<tr>
<td id=col4">7</td>
</tr>
</tbody>
</table>
Any ideas how this could be achieved? I have tried a few things but haven't been able to get it working.

You could define a generic redistribution function, that takes as argument the desired number of columns, and which just fills up the rows with content from top to bottom, using that number of columns.
It could even be a jQuery plugin:
$.fn.redistribute = function(maxNumCols) {
if (maxNumCols < 1) return;
$(this).each(function () {
let cells = Array.from($("td", this));
let $tr = $("tr", this);
let rowCount = Math.ceil(cells.length / maxNumCols);
for (let i = 0; i < rowCount; i++) {
let $row = i >= $tr.length ? $("<tr>").appendTo(this) : $tr.eq(i);
$row.append(cells.splice(0, maxNumCols));
}
});
}
// I/O management
function alignTable() {
let cols = +$("input").val(); // Get desired number of columns
$("#myTable").redistribute(cols); // Apply to table
}
// Refresh whenever input changes
$("input").on("input", alignTable);
// Refresh on page load
alignTable();
table { border-collapse: collapse; border: 2px solid }
td { border: 1px solid; padding: 4px }
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
Desired number of columns: <input type="number" size="3" value="4" min="1">
<table id='myTable'>
<tbody>
<tr>
<td>12</td>
<td>55</td>
<td>142</td>
<td>7</td>
<td>20</td>
<td>410</td>
<td>99</td>
</tr>
</tbody>
</table>
Here is a version with one extra statement that sets the colspan on the very last td element so it occupies the remaining columns in the last row:
$.fn.redistribute = function(maxNumCols) {
if (maxNumCols < 1) return;
$(this).each(function () {
let cells = Array.from($("td", this));
let $tr = $("tr", this);
let rowCount = Math.ceil(cells.length / maxNumCols);
for (let i = 0; i < rowCount; i++) {
let $row = i >= $tr.length ? $("<tr>").appendTo(this) : $tr.eq(i);
$row.append(cells.splice(0, maxNumCols));
}
$("td", this).last().attr("colspan", rowCount * maxNumCols - cells.length + 1);
});
}
// I/O management
function alignTable() {
let cols = +$("input").val(); // Get desired number of columns
$("#myTable").redistribute(cols); // Apply to table
}
// Refresh whenever input changes
$("input").on("input", alignTable);
// Refresh on page load
alignTable();
table { border-collapse: collapse; }
td { border: 1px solid; padding: 4px }
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
Desired number of columns: <input type="number" size="3" value="4" min="1">
<table id='myTable'>
<tbody>
<tr>
<td>12</td>
<td>55</td>
<td>142</td>
<td>7</td>
<td>20</td>
<td>410</td>
<td>99</td>
</tr>
</tbody>
</table>

It sounds like you're still new to jQuery. To give you an idea how to solve your described problem, I have written a solution here. I hope it helps you.
// parameters for splitting
var splitIndex = 3,
splitClass = '.split-columns';
// start the splitting
splitColumnsIntoRows();
function splitColumnsIntoRows() {
var $tables = $(splitClass),
numberTables = $tables.length;
if (numberTables == 0) {
return;
}
for (var i = 0; i < numberTables; i++) {
iterateSplittingRows($($tables[i]).find('tr'));
}
}
function iterateSplittingRows($currentRows) {
var $currentRow,
numberRows = $currentRows.length;
if (numberRows == 0) {
return;
}
for (var i = 0; i < numberRows; i++) {
$currentRow = $($currentRows[i]);
iterateSplittingFields($currentRow, $currentRow.find('th, td'));
}
}
function iterateSplittingFields($currentRow, $currentFields) {
var $newRow,
newRows = [],
childrenLength,
numberFields = $currentFields.length;
if (numberFields == 0) {
return;
}
for (var i = 0; i < numberFields; i++) {
if (i < splitIndex) {
continue;
}
if (i % splitIndex == 0) {
$newRow = $('<tr></tr>');
}
$newRow.append($currentFields[i]);
if (i == numberFields - 1) {
childrenLength = $newRow.children().length;
// fill the row with empty fields if the length does not fit the splitIndex
for (var j = splitIndex; j > childrenLength; j--) {
$newRow.append($('<td></td>'));
}
}
if (
(i >= splitIndex && i % splitIndex == splitIndex - 1)
||
i == numberFields - 1
){
newRows.push($newRow);
}
}
$currentRow.after(newRows);
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<table id="myTable" class="split-columns">
<tbody>
<tr>
<td class="col_01">01</td>
<td class="col_02">02</td>
<td class="col_03">03</td>
<td class="col_04">04</td>
<td class="col_05">05</td>
<td class="col_06">06</td>
<td class="col_07">07</td>
<td class="col_08">08</td>
<td class="col_09">09</td>
</tr>
<tr>
<td class="col_10">10</td>
<td class="col_11">11</td>
<td class="col_12">12</td>
<td class="col_13">13</td>
<td class="col_14">14</td>
<td class="col_15">15</td>
<td class="col_16">16</td>
<td class="col_17">17</td>
</tr>
<tr>
<td class="col_19">19</td>
<td class="col_20">20</td>
<td class="col_21">21</td>
<td class="col_22">22</td>
<td class="col_23">23</td>
<td class="col_24">24</td>
<td class="col_25">25</td>
</tr>
</tbody>
</table>

Creating a show/hide button to toggle table column

I made a table that has questions on the left side and answers on the right side. By default these answers are hidden. If the user presses a button, they show up.
I've found this code and modified it quite a bit but what is still missing is a single button that toggles between Show and Hide. I don't like having two separate buttons.
Since I wanted the answers to be hidden at the beginning I called up the function with showHideColumn(1, false);. Is this correct or is there any nicer approach for this? Are there any other things once could do to optimize the code? (I'm new to programming)
Thanks.
<table id='idTable'>
<tr><td> Questions 1</td><td> Answer 1</td></tr>
<tr><td> Questions 2</td><td> Answer 2</td></tr>
<tr><td> Questions 3</td><td> Answer 3</td></tr>
<tr><td> Questions 4</td><td> Answer 4</td></tr>
<tr><td> Questions 5</td><td> Answer 5</td></tr>
</table>
<input type='button' onClick='javascript:showHideColumn(1, true);' value='show'>
<input type='button' onClick='javascript:showHideColumn(1, false);' value='hide'>
<script>
showHideColumn(1, false);
function showHideColumn(colNo, doShow) {
var rows = document.getElementById('idTable').rows;
for (var row = 0; row < rows.length; row++) {
var cols = rows[row].cells;
if (colNo >= 1 && colNo < cols.length) {
cols[colNo].style.display = doShow ? '' : 'none';
}
}
}
</script>

You can use single button and change its text like below using "innerHTML":
<script type="text/javascript">
var button = document.querySelector('#button');
button.addEventListener('click', function (event) {
if (button.innerHTML == "Hide") {
//Add Code to Hide Columns
button.innerHTML = "Show";
} else {
//Add Code to Show Columns
button.innerHTML = "Hide";
}
}
);
</script>

First of all set global var doShow and change the bool value on every click true and false with current button value
if( doShow ){
doShow = false;
e.value = 'show';
}else{
e.value = 'hide';
doShow = true;
}
Remove second button.
<table id='idTable'>
<tr>
<td> Questions 1</td>
<td> Answer 1</td>
</tr>
<tr>
<td> Questions 2</td>
<td> Answer 2</td>
</tr>
<tr>
<td> Questions 3</td>
<td> Answer 3</td>
</tr>
<tr>
<td> Questions 4</td>
<td> Answer 4</td>
</tr>
<tr>
<td> Questions 5</td>
<td> Answer 5</td>
</tr>
</table>
<input type='button' onClick='javascript:showHideColumn(this, 1);' value='show'>
and update your custom function prams like this showHideColumn(this, 1) and this showHideColumn(null, 1)
<script>
showHideColumn(null, 1);
var doShow;
function showHideColumn(e, colNo) {
if (e != null) {
if (doShow) {
doShow = false;
e.value = 'show';
} else {
e.value = 'hide';
doShow = true;
}
}
var rows = document.getElementById('idTable').rows;
for (var row = 0; row < rows.length; row++) {
var cols = rows[row].cells;
if (colNo >= 1 && colNo < cols.length) {
cols[colNo].style.display = doShow ? '' : 'none';
}
}
}
</script>

Javascript get id from element and then use it

Can you help me with this problem? I can't use return x value for my other function. I want when I click on some element, then script load ID of clicked element and then change color of element with this ID.
Is there some better solution for my problem? (in pure JS, not in Jquery)
Thanks.
<p id="1">foo</p>
<p id="2">bar</p>
<p id="3">baz</p>
<script>
document.addEventListener('click', function(e) {
x=e.target.id;
return x
});
document.getElementById(x).onclick =
function(x) {
if (document.getElementById(x).style.backgroundColor !== 'yellow') {
document.getElementById(x).style.backgroundColor = 'yellow';
}
else {
document.getElementById(x).style.backgroundColor = 'red';
}
};
</script>

Change your code to below.
<p id="1">foo</p>
<p id="2">bar</p>
<p id="3">baz</p>
document.addEventListener('click', function(e) {
x=e.target.id;
function() {
var bgColor = document.getElementById(x).style.backgroundColor;
if (bgColor !== 'yellow') {
bgColor = 'yellow';
}
else {
bgColor = 'red';
}
}
});
</script>

Ok i find solution on my problem.
The solution was put all my script in one function and than evrything work.
I learning JS about 1 mount and now I have made one simple LIGHTS OFF game.
Now I nedd some function that check all cells color and alert end of game, but i cant answer a new question because by question is not voted well, and i dont know why.
Here is the example of my code:
document.addEventListener('click', function(e) {
var x = e.target.id
var up = ((Math.floor(x.charAt(0))-1).toString()).concat(x.charAt(1));
var down = ((Math.floor(x.charAt(0))+1).toString()).concat(x.charAt(1));
var left = (x.charAt(0)).concat((Math.floor(x.charAt(1))-1).toString());
var right = (x.charAt(0)).concat((Math.floor(x.charAt(1))+1).toString());
if( document.getElementById(x).style.backgroundColor == ''){document.getElementById(x).style.backgroundColor = 'black';}
else{document.getElementById(x).style.backgroundColor ='';}
if(document.getElementById(up)!=null){
if( document.getElementById(up).style.backgroundColor == ''){document.getElementById(up).style.backgroundColor = 'black';}
else{document.getElementById(up).style.backgroundColor ='';}}
if(document.getElementById(down)!=null){
if( document.getElementById(down).style.backgroundColor == ''){document.getElementById(down).style.backgroundColor = 'black';}
else{document.getElementById(down).style.backgroundColor ='';}}
if(document.getElementById(left)!=null){
if( document.getElementById(left).style.backgroundColor == ''){document.getElementById(left).style.backgroundColor = 'black';}
else{document.getElementById(left).style.backgroundColor ='';}}
if(document.getElementById(right)!=null){
if( document.getElementById(right).style.backgroundColor == ''){document.getElementById(right).style.backgroundColor = 'black';}
else{document.getElementById(right).style.backgroundColor ='';}}
// var all = document.getElementsByTagName("TD");
// var i;
// for (i = 0; i < all.length; i++) {
// all[i].style.backgroundColor!=='yellow';
// alert('a')
// break}
})
td {
padding: 50px;
background-color: yellow;
<table>
<tr>
<td id='11'></td>
<td id='12'></td>
<td id='13'></td>
<td id='14'></td>
<td id='15'></td>
</tr>
<tr>
<td id='21'></td>
<td id='22'></td>
<td id='23'></td>
<td id='24'></td>
<td id='25'></td>
</tr>
<tr>
<td id='31'></td>
<td id='32'></td>
<td id='33'></td>
<td id='34'></td>
<td id='35'></td>
</tr>
<tr>
<td id='41'></td>
<td id='42'></td>
<td id='43'></td>
<td id='44'></td>
<td id='45'></td>
</tr>
<tr>
<td id='51'></td>
<td id='52'></td>
<td id='53'></td>
<td id='54'></td>
<td id='55'></td>
</tr>
</table>

Cannot extract data from TD if there is span in front

I need your help.
Because of the way IE7 chooses to ignore the TD: whitespace: nowrap, I am forced to put and use spans in front of my TD's so here's the delema. When I click on a table row that has no spans in between the td's, the coding is able to extract the data and highlight the row.
However, when I introduce a span in between my td's and click to select a single cell in the table row with the spans's I get the following error: "cells.0 is null or not an object." I know that if I click a little bit off the side of the table cell it works, but I need to be able to also click on the <TD> and <SPAN> areas and have the code work.
Since I am making a table that will have all <span></span>'s in between all the <TD>'s how can the existing coding be reformatted to accomodate the difference from <td>data</td> to <td><span>data</span></td>?
No jQuery please.
<!DOCTYPE html>
<html>
<head>
<style type="text/css">
#data tr.normal td {
color: #235A81;
background-color: white;
}
#data tr.highlighted td {
color: #FFFFFF;
background-color: #235A81;
}
</style>
<script type='text/javascript'>
function test() {
var table = document.getElementById("data");
var thead = table.getElementsByTagName("thead")[0];
var tbody = table.getElementsByTagName("tbody")[0];
var ishigh
tbody.onclick = function (e) {
e = e || window.event;
var td = e.target || e.srcElement
var row = td.parentNode;
if (ishigh&&ishigh!=row){
ishigh.className='';
}
row.className = row.className==="highlighted" ? "" : "highlighted";
ishigh=row;
getdata(row)
}
document.onkeydown = function(e){
e = e || event;
var code = e.keyCode, rowslim = table.rows.length - 2, newhigh;
if(code === 38){ //up arraow
newhigh = rowindex(ishigh) - 2;
if(!ishigh || newhigh < 0){return GoTo('data', rowslim);}
return GoTo('data', newhigh);
} else if (code === 40){ //down arrow
newhigh = rowindex(ishigh);
if(!ishigh || newhigh > rowslim){return GoTo('data', 0);}
return GoTo('data', newhigh);
}
}
function GoTo(id,nu){
var obj=document.getElementById(id),
trs=obj.getElementsByTagName('TR');
nu = nu + 1;
if (trs[nu]){
if (ishigh&&ishigh!=trs[nu]){
ishigh.className='';
}
trs[nu].className = trs[nu].className=="highlighted" ? "" : "highlighted";
ishigh=trs[nu];
}
getdata(trs[nu]);
}
function rowindex(row){
var rows = table.rows, i = rows.length;
while(--i > -1){
if(rows[i] === row){return i;}
}
}
function getdata(row) {
document.getElementById('firstname').value = row.cells[0].innerHTML;
document.getElementById('lastname').value = row.cells[1].innerHTML;
document.getElementById('age').value = row.cells[2].innerHTML;
document.getElementById('total').value = row.cells[3].innerHTML;
document.getElementById('discount').value = row.cells[4].innerHTML;
document.getElementById('diff').value = row.cells[5].innerHTML;
find_option('fname',row.cells[0].innerHTML)
}
}//end of nested function
function find_option(id,value) {
var sel = document.getElementById(id)
for (var i = 0; i < sel.length; i++){
//alert(sel.options[i].text+" "+sel.options[i].value)
if (sel.options[i].value == value) {
sel.selectedIndex = i;
return
}
}
}
</script>
</head>
<body>
<table id="data" cellspacing="1" border="1">
<thead>
<tr>
<th>first name</th>
<th>last name</th>
<th>age</th>
<th>total</th>
<th>discount</th>
<th>diff</th>
</tr>
</thead>
<tbody>
<tr>
<td><span>peter</span></td>
<td><span>parker</span></td>
<td><span>28</span></td>
<td><span>9.99</span></td>
<td><span>20.3%</span></td>
<td><span>+3</span></td>
</tr>
<tr>
<td>john</td>
<td>hood</td>
<td>33</td>
<td>19.99</td>
<td>25.1%</td>
<td>-7</td>
</tr>
<tr>
<td>clark</td>
<td>kent</td>
<td>18</td>
<td>15.89</td>
<td>44.2%</td>
<td>-15</td>
</tr>
<tr>
<td>bruce</td>
<td>almighty</td>
<td>45</td>
<td>153.19</td>
<td>44%</td>
<td>+19</td>
</tr>
<tr>
<td>benjamin</td>
<td>evans</td>
<td>56</td>
<td>153.19</td>
<td>23%</td>
<td>+9</td>
</tr>
</tbody>
</table>
<br>
Firstname is:
<input type="text" id="firstname" />
<br>Lastname is:
<input type="text" id="lastname" />
<br>Age is:
<input type="text" id="age" />
<br>Total is:
<input type="text" id="total" />
<br>Discount is:
<input type="text" id="discount" />
<br>Diff is:
<input type="text" id="diff" />
<br>
<input type="button" value="testme" onclick="test()">
<br><br>
<select id="fname">
<option value="bruce">bruce</option>
<option value="clark">clark</option>
<option value="benjamin">benjamin</option>
</select>
</body>
</html>

Change this line:
var row = td.parentNode;
to:
var row = (td.tagName == "DIV") ? td.parentNode.parentNode : td.parentNode;

You can look at the elemet's tag name and determine whether the user has clicked on a TD or a SPAN, then adjust select the element's parent (the TD) if you have a span.
var td = e.target || e.srcElement
alert(td.tagName)
Alternately, you can add a CSS class name to all of your SPANS and then check to see if the selected element has that class name. If it does, it's a SPAN, if it doesn't, it's a TD.
I would also suggest using a DIV, not a SPAN.

Populate input boxes based on the clicked/scrolled row in table

I need your help.
With the help of existing javascript experts, I was able to create a table where a user could scoll to (using their up and down arrow keys) as well as to allow a user click on a row to select and highlight it.
Now comes time where i'd like to modify my existing function such that, whenever the user clicks on or uses their arrow keys to navigate to the selected row in the table, id like to pull the information (data) from the row and use it to populate the list of input boxes below. How could the javascript coding be modified so as to allow me to do this?
<!DOCTYPE html>
<html>
<head>
<style type="text/css">
#mstrTable tr.normal td {
color: #235A81;
background-color: white;
}
#mstrTable tr.highlighted td {
color: #FFFFFF;
background-color: #235A81;
}
</style>
<script type='text/javascript'>
function test() {
var table = document.getElementById("mstrTable");
var thead = table.getElementsByTagName("thead")[0];
var tbody = table.getElementsByTagName("tbody")[0];
var ishigh;
tbody.onclick = function (e) {
e = e || window.event;
var td = e.target || e.srcElement
var row = td.parentNode;
if (ishigh&&ishigh!=row){
ishigh.className='';
}
row.className = row.className==="highlighted" ? "" : "highlighted";
ishigh=row;
}
document.onkeydown = function(e){
e = e || event;
var code = e.keyCode, rowslim = table.rows.length - 2, newhigh;
if(code === 38){ //up arraow
newhigh = rowindex(ishigh) - 2;
if(!ishigh || newhigh < 0){return GoTo('mstrTable', rowslim);}
return GoTo('mstrTable', newhigh);
} else if (code === 40){ //down arrow
newhigh = rowindex(ishigh);
if(!ishigh || newhigh > rowslim){return GoTo('mstrTable', 0);}
return GoTo('mstrTable', newhigh);
}
}
function GoTo(id,nu){
var obj=document.getElementById(id),
trs=obj.getElementsByTagName('TR');
nu = nu + 1;
if (trs[nu]){
if (ishigh&&ishigh!=trs[nu]){
ishigh.className='';
}
trs[nu].className = trs[nu].className=="highlighted" ? "" : "highlighted";
ishigh=trs[nu];
}
}
function rowindex(row){
var rows = table.rows, i = rows.length;
while(--i > -1){
if(rows[i] === row){return i;}
}
}
}//end of nested function
</script>
</head>
<body>
<table id="mstrTable" cellspacing="1" border="1">
<thead>
<tr>
<th>first name</th>
<th>last name</th>
<th>age</th>
<th>total</th>
<th>discount</th>
<th>diff</th>
</tr>
</thead>
<tbody>
<tr>
<td>peter</td>
<td>parker</td>
<td>28</td>
<td>9.99</td>
<td>20.3%</td>
<td>+3</td>
</tr>
<tr>
<td>john</td>
<td>hood</td>
<td>33</td>
<td>19.99</td>
<td>25.1%</td>
<td>-7</td>
</tr>
<tr>
<td>clark</td>
<td>kent</td>
<td>18</td>
<td>15.89</td>
<td>44.2%</td>
<td>-15</td>
</tr>
<tr>
<td>bruce</td>
<td>almighty</td>
<td>45</td>
<td>153.19</td>
<td>44%</td>
<td>+19</td>
</tr>
<tr>
<td>bruce</td>
<td>evans</td>
<td>56</td>
<td>153.19</td>
<td>23%</td>
<td>+9</td>
</tr>
</tbody>
</table>
<br>
Firstname is:
<input type="text" id="firstname" />
<br>Lastname is:
<input type="text" id="lastname" />
<br>Age is:
<input type="text" id="age" />
<br>Total is:
<input type="text" id="total" />
<br>Discount is:
<input type="text" id="discount" />
<br>Diff is:
<input type="text" id="diff" />
<br>
<input type="button" value="testme" onclick="test()">
</body>
</html>

You can write another function to populate necessary fields. Example:
function populateFields(row) {
el('firstname').value = row.cells[0].innerHTML;
el('lastname').value = row.cells[1].innerHTML;
el('age').value = row.cells[2].innerHTML;
el('total').value = row.cells[3].innerHTML;
el('discount').value = row.cells[4].innerHTML;
el('diff').value = row.cells[5].innerHTML;
}
// el() is shortcut for document.getElementById
Where you pass corresponding row to the function to get data from.
http://jsfiddle.net/dfsq/HDu8n/