Loop through elements in a HTML table - javascript

I am learning Javascript, in a school assignment we have to by using a loop count how many games was made in 2014.
It does not return anything in the console, where have I gone wrong?
var allGames = document.getElementsByTagName('td');
var array = Array.prototype.slice.call(allGames, 0)
var games14 = 0;
for (var i = 0; i < array.length; ++i) {
if (array[i] == 2014) {
games14++;
console.log(games14)
}
}
<table id="games">
<thead>
<tr>
<th>Titel</th>
<th>Genre</th>
<th>Årstal</th>
</tr>
</thead>
<tbody id="games_tbody">
<tr class="horror">
<td class="title">Outlast</td>
<td>Horror</td>
<td>2013</td>
</tr>
<tr class="rpg">
<td class="title">Dragon Age: Inquisition</td>
<td>Role-playing Game</td>
<td>2014</td>
</tr>
<tr class="rpg">
<td class="title">Skyrim</td>
<td>Role-playing Game</td>
<td>2011</td>
</tr>
<tr class="horror">
<td class="title">Amnesia: The Dark Descent</td>
<td>Horror</td>
<td>2010</td>
</tr>
<tr class="simulator">
<td class="title">Scania Truck Driving Simulator</td>
<td>Simulator</td>
<td>2012</td>
</tr>
<tr class="horror">
<td class="title">Five Nights at Freddy’s</td>
<td>Horror</td>
<td>2014</td>
</tr>
<tr class="simulator">
<td class="title">Sims 4</td>
<td>Simulator</td>
<td>2014</td>
</tr>
<tr class="rts" id="last">
<td class="title">Warcraft III: Reign of Chaos</td>
<td>Real-time Strategy</td>
<td>2002</td>
</tr>
</tbody>
</table>

You need to check for its text:
var allGames = document.getElementsByTagName('td');
...
if (array[i].innerHTML == '2014') {
OR,
if(array[i].innerText == '2014' || array[i].textContent == '2014'){

No need to do Loop through elements in a HTML table.. You can simply use regular expressions to count all occurrences within the games_tbody:
var games14 = document
.getElementById('games_tbody')
.innerText
.match(/2014/g)
.length;
console.log('Games made in 2014:', games14);
<table id="games">
<thead>
<tr><th>Titel</th><th>Genre</th><th>Årstal</th></tr>
</thead>
<tbody id="games_tbody">
<tr class="horror"><td class="title">Outlast</td><td>Horror</td><td>2013</td></tr>
<tr class="rpg"><td class="title">Dragon Age: Inquisition</td><td>Role-playing Game</td><td>2014</td></tr>
<tr class="rpg"><td class="title">Skyrim</td><td>Role-playing Game</td><td>2011</td></tr>
<tr class="horror"><td class="title">Amnesia: The Dark Descent</td><td>Horror</td><td>2010</td></tr>
<tr class="simulator"><td class="title">Scania Truck Driving Simulator</td><td>Simulator</td><td>2012</td></tr>
<tr class="horror"><td class="title">Five Nights at Freddy’s</td><td>Horror</td><td>2014</td></tr>
<tr class="simulator"><td class="title">Sims 4</td><td>Simulator</td><td>2014</td></tr>
<tr class="rts" id="last"><td class="title">Warcraft III: Reign of Chaos</td><td>Real-time Strategy</td><td>2002</td></tr>
</tbody>
</table>

array[i] == 2014
Everything in the array will be an HTML Table Data Cell Element object.
Nothing in the array will be the Number 2014.
You need to read the text content from the element and then compare that.

I think this is a better way.
var table = document.getElementById("games");
count = 0;
for (let i = 0; row = table.rows[i]; i++) {
if (row.cells[2].innerHTML === "2014"){
count++;
}
/*
for (let j = 0; col = row.cells[j]; j++) {
if (col.innerHTML === "2014"){
count++;
}
}
*/
}
console.log(count);
The commented code is for checking every item on a single row.

Related

Function name is not defined at HTMLTableCellElement.onclick

I want to make X and O game , So the first function i did it has loop and condition that when i click on any cell(td) in the table and if all cells in the table are empty wrote X in the cell which I clicked it , but I have here 2 problem ,
First one The console wrote (Sample1.html:53 Uncaught SyntaxError: Unexpected token '<') it refers to for loop, so I don't know what is the problem there.
the second problem console wrote also that my function name is not define , although the function name is correct so can anyone help me.
the JS codes is
<script >
/*var lastGame;*/
var TR=0;
var table = document.getElementById('tb');
function CheckAllEmpty(idClicked){
for(var x=0, x < table.rows.length; x++){
if(!table.rows[x])
{
TR++;
}
else{}
}
if(TR==9)
{
document.getElementById(idClicked).innerHTML="X";
}
else {}
}
</script>
And the HTML :
<table id="tb">
<tr>
<td id="td1" onclick="CheckAllEmpty(this.id);"></td>
<td id="td2"></td>
<td id="td3"></td>
</tr>
<tr>
<td id="td4"></td>
<td id="td5"></td>
<td id="td6"></td>
</tr>
<tr>
<td id="td7"></td>
<td id="td8"></td>
<td id="td9"></td>
</tr>
</table>
There seems to be other problems with your code, but your two specific problems should be fixed. Also I don't see why you need to check if every cell is empty, but then again I can't see the rest of your code. Feel free to ask any questions in the comments.
var TR = 0;
var table = document.getElementById('tb');
function CheckAllEmpty(idClicked) {
for (var x = 0; x < table.rows.length; x++) {
if (!(table.rows[x].value == "")) {
TR++;
console.log(TR);
}
}
if (TR == 3) {
document.getElementById(idClicked).innerHTML = "X";
}
}
CheckAllEmpty('td1');
<table id="tb">
<tr>
<td id="td1" onclick="CheckAllEmpty(this.id)"></td>
<td id="td2"></td>
<td id="td3"></td>
</tr>
<tr>
<td id="td4"></td>
<td id="td5"></td>
<td id="td6"></td>
</tr>
<tr>
<td id="td7"></td>
<td id="td8"></td>
<td id="td9"></td>
</tr>
</table>

loop over table to set the background css

My HTML table has some classes and table tag is used
Want to retain the classes as is, but all my table and tr , th or td are using td bgcolor which is an old technique.
I want to loop over the table and find if that bgcolor is defined, use the same color and convert it to a css based background color so i can print it in IE
function setBackground() {
var table = document.getElementById("table1");
//i found this in a previous stack overflow answer and tried it
for (var i = 0, row; row = table.rows[i]; i++) {
for (var j = 0, col; col = row.cells[j]; j++) {
//this is for debugging purposes... I can't even get this to work
alert(table.rows[i].cells[j]);
table.rows[i].cells[j].style.background = "orange"; //just an example
}
}
}
because IE is not able to print the background lines and colors for some reason using the webkit property
I cleaned up the for loops a little. You can read the attribute with getAttribute and set the style.
var table = document.getElementById("table1");
for (var i = 0; i < table.rows.length; i++) {
var row = table.rows[i]
for (var j = 0; j < row.cells.length; j++) {
var cell = row.cells[j]
var bgc = cell.getAttribute('bgcolor')
if (bgc) {
cell.style.background = bgc
}
}
}
td {
width: 30px; height: 30px;
}
<table id="table1">
<tr>
<td bgcolor="red"></td>
<td></td>
<td bgcolor="blue"></td>
</tr>
<tr>
<td></td>
<td bgcolor="green"></td>
<td></td>
</tr>
<tr>
<td bgcolor="yellow"></td>
<td></td>
<td></td>
</tr>
<tr>
<td bgcolor="silver"></td>
<td></td>
<td></td>
</tr>
</table>
You can just do it with one loop with getElementsByTagName
var tds = document.getElementById("table1").getElementsByTagName("td");
for (var i = 0; i < tds.length; i++) {
var cell = tds[i]
var bgc = cell.getAttribute('bgcolor')
if (bgc) {
cell.style.background = bgc
}
}
td {
width: 30px; height: 30px;
}
<table id="table1">
<tr>
<td bgcolor="red"></td>
<td></td>
<td bgcolor="blue"></td>
</tr>
<tr>
<td></td>
<td bgcolor="green"></td>
<td></td>
</tr>
<tr>
<td bgcolor="yellow"></td>
<td></td>
<td></td>
</tr>
<tr>
<td bgcolor="silver"></td>
<td></td>
<td></td>
</tr>
</table>
Get the color if found and then do with it whatever needed...
function setBackgroundColor(colorValue) {
const table = document.getElementById("table1");
const rows = table.children[0].rows
for (let i = 0; i < rows.length; i++) {
const tds = rows[i].children;
for (let j = 0; j < tds.length; j++) {
if (tds[j].bgColor === colorValue) {
console.log('Color found, do action')
}
}
}
}
setBackgroundColor('red')
<table id="table1">
<tr>
<th>Month</th>
<th>Savings</th>
</tr>
<tr>
<td bgcolor="red">January</td>
<td bgcolor="green">$100</td>
</tr>
</table>
You can do this:
var cells = $("#targetTable td");
for(i in cells){
color = $(cells[i]).attr('bgcolor');
console.log(color);
$(cells[i]).css({background: color});
}
as Taplar mentioned in the comment :
Use document.querySelectorAll('td[bgcolor]') to get the td that have bgcolor, loop through them and set the background to that color :
document.querySelectorAll('td[bgcolor]').forEach(e => {
const bgColor = e.getAttribute('bgcolor');
e.removeAttribute('bgcolor'); // optional, if you want to remove the attribute
e.style.background = bgColor;
})
<table id="table1">
<thead>
<th>A</th>
<th>B</th>
<th>C</th>
</thead>
<tbody>
<tr>
<td bgcolor="red">1</td>
<td>2</td>
<td>3</td>
</tr>
<tr>
<td>4</td>
<td bgcolor="green">5</td>
<td>6</td>
</tr>
<tr>
<td>7</td>
<td>8</td>
<td bgcolor="blue">9</td>
</tr>
</tbody>
</table>

td element not parsed to int

I have a table with id #tab1.
For each row, I want to calculate the value of column Points / Matches and to put it in the column Coeficiency, but my code doesn't work.
The numbers aren't parsed to int. I would always like to know if
elem[4].innerHTML(z); is ok to set coeficiency.
Average();
function Average() {
var table = document.getElementById('tab1'),
rows = table.getElementsByTagName('tbody')[1].getElementsByTagName('tr');
//console.log(rows.length);
for (var i = 0; i < rows.length; i++) {
elem = rows[i].getElementsByClassName("columns");
var x = parseInt(elem[2]);
var y = parseInt(elem[3]);
// console.log(x+y," ");
console.log(x, " ", y);
var z = y / x;
elem[4].innerHTML(z);
}
<div id="mytable">
<table id="tab1">
<tr class="rows">
<th class="columns">#</th>
<th class="columns">Team</th>
<th class="columns">Matches</th>
<th class="columns">Points</th>
<th class="columns">Coeficiency</th>
</tr>
<tbody>
<tr class="rows">
<td class="columns">1</td>
<td class="columns">Baetasii</td>
<td class="columns">3</td>
<td class="columns">9</td>
<td class="columns">100%</td>
</tr>
<tr class="rows">
<td class="columns">2</td>
<td class="columns">Carcotasii</td>
<td class="columns">2</td>
<td class="columns">5</td>
<td class="columns">100%</td>
</tr>
</tbody>
</table>
</div>
Okay, so a few pointers having looked over your code, first of all innerHTML is not a function, it's a simple property, you can just reassign it, however, I suggest using textContent due to the fact that using innerHTML, you can allow for XSS to occur.
I mean I know XSS probably isn't an issue in this specific scenario, however I thought it my be of value mentioning that.
Also, as I mentioned in the comments above, using parseInt, you need to pass it a string rather than an object which is what you were originally doing. Using functions such as getElementsByClassName or querySelectorAll, you'll have an array-like object, such as a HTMLCollection which contains a number of objects, usually Elements or Nodes.
Average();
function Average() {
var table = document.getElementById('tab1'),
rows = table.getElementsByTagName('tbody')[1].getElementsByTagName('tr');
//console.log(rows.length);
for (var i = 0; i < rows.length; i++) {
elem = rows[i].getElementsByClassName("columns");
var x = parseInt(elem[2].textContent);
var y = parseInt(elem[3].textContent);
// console.log(x+y," ");
console.log(x, " ", y);
var z = y / x;
elem[4].textContent = z;
}
}
<div id="mytable">
<table id="tab1">
<tr class="rows">
<th class="columns">#</th>
<th class="columns">Team</th>
<th class="columns">Matches</th>
<th class="columns">Points</th>
<th class="columns">Coeficiency</th>
</tr>
<tbody>
<tr class="rows">
<td class="columns">1</td>
<td class="columns">Baetasii</td>
<td class="columns">3</td>
<td class="columns">9</td>
<td class="columns">100%</td>
</tr>
<tr class="rows">
<td class="columns">2</td>
<td class="columns">Carcotasii</td>
<td class="columns">2</td>
<td class="columns">5</td>
<td class="columns">100%</td>
</tr>
</tbody>
</table>
</div>
Edit
I thought I'd also include a neater version, it does near enough the same logic stuff, it's more or less just more modern JavaScript syntax, using a more 'functional-style'. Originally I basically copied the exact same style that you provided for the sake of simplicity, but I thought that there's a few issues with that. An example being how you've used a capital letter for the Average, personally I only use a capital letter at the start of a name if it's a class, this is a personal choice however, feel free to disagree or stick to what you know!
I personally prefer using more modern syntax as personally I think is easier to read, it's more clear and concise, generally it looks like less code to read through.
// States if an array like object is empty or not.
const isEmpty = a => a.length > 0;
// Returns the text content of a html object.
const txt = td => td == null ? null : td.textContent;
// Simply updates the UI.
const render = tds => v => tds[4].textContent = parseFloat(v).toFixed(2);
// Works out whether or not to fire update or do nothing.
const compute = tds => isEmpty(tds) ? render(tds)(txt(tds[3]) / txt(tds[2])) : null;
// Gets the average for each tr.
const avg = trs => trs.forEach(tr => compute(tr.querySelectorAll("td")));
// Fire the avg function.
const update = () => avg(document.querySelectorAll("#tab1 tbody tr"));
// Render tr tag.
const renderTr = i => n => m => p => `<tr>
<td>${i}</td><td>${n}</td><td>${m}</td><td>${p}</td><td></td>
</tr>`;
// Add a table row.
const append = () => {
const tbl = document.getElementById("tab1");
const i = document.querySelectorAll("#tab1 tbody tr").length,
n = '_____',
m = Math.floor(Math.random() * 10) + 1,
p = Math.floor(Math.random() * 10) + 1;
// Safe-ish because what's being entered is controlled 100%.
// But generally try not to use innerHTML.
tbl.innerHTML += renderTr(i)(n)(m)(p);
update();
};
// Allow for auto add.
document.getElementById("add").onclick = append;
update(); // Initial run.
<div id="mytable">
<table id="tab1">
<tr class="rows">
<th class="columns">#</th>
<th class="columns">Team</th>
<th class="columns">Matches</th>
<th class="columns">Points</th>
<th class="columns">Coeficiency</th>
</tr>
<tbody>
<tr class="rows">
<td class="columns">1</td>
<td class="columns">Baetasii</td>
<td class="columns">3</td>
<td class="columns">9</td>
<td class="columns">100%</td>
</tr>
<tr class="rows">
<td class="columns">2</td>
<td class="columns">Carcotasii</td>
<td class="columns">2</td>
<td class="columns">5</td>
<td class="columns">100%</td>
</tr>
</tbody>
</table>
</div>
<button id="add">Add Row</button>
Using Object#values Array#forEach #getElementsByTagName
The main issue is that you needed to retrieve the text value with innerText.
You also don't need the redundant class names.
const table = document.getElementById("table");
const rows = table.querySelectorAll("tbody > tr");
Object.values(rows).forEach(row => {
const tds = row.getElementsByTagName('td');
if (tds.length === 5) {
const x = parseInt(tds[2].innerText),
y = parseInt(tds[3].innerText);
const z = y / x;
tds[4].innerText = `${z}`;
}
});
<table id="table">
<tr>
<th>#</th>
<th>Team</th>
<th>Matches</th>
<th>Points</th>
<th>Coeficiency</th>
</tr>
<tbody>
<tr>
<td>1</td>
<td>Baetasii</td>
<td>3</td>
<td>9</td>
<td>100%</td>
</tr>
<tr>
<td>2</td>
<td>Carcotasii</td>
<td>2</td>
<td>5</td>
<td>100%</td>
</tr>
</tbody>
</table>
getElementsByClassName returns an array-like object of all child elements which have all of the given class names.
Since we have a collection of DOM elements, elem[2] it's a DOM element and you should access its textContent property.
Also, you're using innerHTML property in a wrong way. Just replace
elem[4].innerHTML(z);
to
elem[4].innerHTML = z;
Average();
function Average() {
var table = document.getElementById('tab1'),
rows = table.getElementsByTagName('tbody')[1].getElementsByTagName('tr');
for (var i = 0; i < rows.length; i++) {
elem = rows[i].getElementsByClassName("columns");
var x = parseInt(elem[2].textContent);
var y = parseInt(elem[3].textContent);
console.log(x, " ", y);
var z = y / x;
elem[4].innerHTML = z;
}
}
<div id="mytable">
<table id="tab1">
<tr class="rows">
<th class="columns">#</th>
<th class="columns">Team</th>
<th class="columns">Matches</ht>
<th class="columns">Points</th>
<th class="columns">Coeficiency</th>
<tbody>
<tr class="rows">
<td class="columns">1</td>
<td class="columns">Baetasii</td>
<td class="columns">3</td>
<td class="columns">9</td>
<td class="columns">100%</td>
</tr>
<tr class="rows">
<td class="columns">2</td>
<td class="columns">Carcotasii</td>
<td class="columns">2</td>
<td class="columns">5</td>
<td class="columns">100%</td>
</tr>
</tbody>
</table>
</div>

JS - Compare first row to other rows in table

I'm a completely newbie and looking for help.
Given the following table:
<table id="table">
<thead>
# FIRST ROW
<tr>
<th>Apple</th>
<th>Pizza</th>
<th>Eggs</th>
</tr>
<tbody>
# SECOND ROW
<tr>
<td>Apple</td> --> should end with 'success' class
<td>Juice</td>
<td>Lettuce</td>
<td>Oranges</td>
<td>Eggs</td> --> should end with 'success' class
</tr>
# THIRD ROW
<tr>
<td>Pizza</td> --> should end with 'success' class
<td>Chicken</td>
</tr>
</tbody>
</table>
I would like to add class 'success' to every td in SECOND and THIRD rows whenever it matches any td in FIRST row (and only in FIRST ROW).
For now I came up with adding <td> values of first row to array and I'm not sure what steps should I take next (filter? for loop and '===' comparison?):
function myFunction() {
var tHeadersValues = [];
var tHeaders = document.getElementById("table").rows[0].cells;
for (var i = 0; i < tHeaders.length; i++) {
tHeadersValues.push(tHeaders[i].textContent);
}
return tHeadersValues;
}
Object.keys(tHeaders).map(key => tHeaders[key].textContent) transforms the td objects to an array with the containing text. The rest is straight forward:
function toValues(tHeaders) {
return Object.keys(tHeaders).map(function(key){
return tHeaders[key].textContent;
});
}
function myFunction() {
var rows = document.getElementById("results-table").rows;
var tHeadersValues = toValues(rows[0].cells);
for (var i = 1; i < rows.length; i++) {
var rowCells = rows[i].cells;
var values = toValues(rowCells);
for(var j=0;j<values.length;j++) {
if(values[j].length > 0 && tHeadersValues.indexOf(values[j]) > -1) {
rowCells[j].className = "success";
}
}
}
}
myFunction();
<style>
.success {
background-color: green;
}
</style>
<table id="results-table">
<thead>
<tr>
<th>Apple</th>
<th>Pizza</th>
<th>Eggs</th>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td>Apple</td>
<td>Juice</td>
<td>Lettuce</td>
<td>Oranges</td>
<td>Eggs</td>
</tr>
<tr>
<td>Pizza</td>
<td>Chicken</td>
<td></td>
<td></td>
<td></td>
</tr>
</tbody>
</table>
function myFunc(){
var tds = document.getElementsByTagName("td");
var hds = document.getElementsByTagName("th");
for(var i=0; i<tds.length; i++) {
var tdContent = tds[i].innerHTML;
if(tdContent.length > 0){
for(var j = 0; j<hds.length; j++) {
if(tdContent === hds[j].innerHTML) {
document.getElementsByTagName("td")[i].className = "success";
}
}
}
}
}
myFunc();
<style>
.success {
background-color: green;
}
</style>
<table id="results-table">
<thead>
<tr>
<th>Apple</th>
<th>Pizza</th>
<th>Eggs</th>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td>Apple</td>
<td>Juice</td>
<td>Lettuce</td>
<td>Oranges</td>
<td>Eggs</td>
</tr>
<tr>
<td>Pizza</td>
<td>Chicken</td>
<td></td>
<td></td>
<td></td>
</tr>
</tbody>
</table>

merging <td> rows in one column of html table

I have a requirement, if i have same data in column1 of 's with same id then i need to merge those cells and show their respective values in column2.
i.e., in fiddle http://jsfiddle.net/7t9qkLc0/12/ the key column have 3rows with data 1 as row value with same id and has corresponding different values in Value column i.e., AA,BB,CC. I want to merge the 3 rows in key Column and display data 1 only once and show their corresponding values in separate rows in value column.
Similarly for data4 and data5 the values are same i.e.,FF and keys are different, i want to merge last 2 rows in Value column and dispaly FF only one time and show corresponding keys in key column. All data i'm getting would be the dynamic data. Please suggest.
Please find the fiddle http://jsfiddle.net/7t9qkLc0/12/
Sample html code:
<table width="300px" height="150px" border="1">
<tr><th>Key</th><th>Value</th></tr>
<tr>
<td id="1">data 1</td>
<td id="aa">AA</td>
</tr>
<tr>
<td id="1">data 1</td>
<td id="bb">BB</td>
</tr>
<tr>
<td id="1">data 1</td>
<td id="cc">CC</td>
</tr>
<tr>
<td id="2">data 2</td>
<td id="dd">DD</td>
</tr>
<tr>
<td id="2">data 2</td>
<td id="ee">EE</td>
</tr>
<tr>
<td id="3">data 3</td>
<td id="ff">FF</td>
</tr>
<tr>
<td id="4">data 4</td>
<td id="ff">FF</td>
</tr>
<tr>
<td id="5">data 5</td>
<td id="ff">FF</td>
</tr>
</table>
</td>
</tr>
<tr>
<td colspan="3" style="padding-left: 0px; padding-right: 0px; padding-bottom: 0px">
</td>
</tr>
</table>
Building on tkounenis' answer using Rowspan:
One option to implement what you need would be to read all the values in your table after being populated, then use a JS object literal as a data structure to figure out what rows/columns are unique.
A JS object literal requires a unique key which you can map values to. After figuring out what rows/columns should be grouped, you can either edit the original table, or hide the original table and create a new table (I'm creating new tables in this example).
I've created an example for you to create a new table either grouped by key or grouped by value. Try to edit the examples provided to introduce both requirements.
Let me know if you need more help. Best of luck.
JSFiddle: http://jsfiddle.net/biz79/x417905v/
JS (uses jQuery):
sortByCol(0);
sortByCol(1);
function sortByCol(keyCol) {
// keyCol = 0 for first col, 1 for 2nd col
var valCol = (keyCol === 0) ? 1 : 0;
var $rows = $('#presort tr');
var dict = {};
var col1name = $('th').eq(keyCol).html();
var col2name = $('th').eq(valCol).html();
for (var i = 0; i < $rows.length; i++) {
if ($rows.eq(i).children('td').length > 0) {
var key = $rows.eq(i).children('td').eq(keyCol).html();
var val = $rows.eq(i).children('td').eq(valCol).html();
if (key in dict) {
dict[key].push(val);
} else {
dict[key] = [val];
}
}
}
redrawTable(dict,col1name,col2name);
}
function redrawTable(dict,col1name,col2name) {
var $table = $('<table>').attr("border",1);
$table.css( {"width":"300px" } );
$table.append($('<tr><th>' +col1name+ '</th><th>' +col2name+ '</th>'));
for (var prop in dict) {
for (var i = 0, len = dict[prop].length; i< len; i++) {
var $row = $('<tr>');
if ( i == 0) {
$row.append( $("<td>").attr('rowspan',len).html( prop ) );
$row.append( $("<td>").html( dict[prop][i] ) );
}
else {
$row.append( $("<td>").html( dict[prop][i] ) );
}
$table.append($row);
}
}
$('div').after($table);
}
Use the rowspan attribute like so:
<table width="300px" height="150px" border="1">
<tr>
<th>Key</th>
<th>Value</th>
</tr>
<tr>
<td id="1" rowspan="3">data 1</td>
<td id="aa">AA</td>
</tr>
<tr>
<td id="bb">BB</td>
</tr>
<tr>
<td id="cc">CC</td>
</tr>
<tr>
<td id="2" rowspan="2">data 2</td>
<td id="dd">DD</td>
</tr>
<tr>
<td id="ee">EE</td>
</tr>
<tr>
<td id="3">data 3</td>
<td id="ff">FF</td>
</tr>
<tr>
<td id="4">data 4</td>
<td id="ff">FF</td>
</tr>
<tr>
<td id="5">data 5</td>
<td id="ff">FF</td>
</tr>
</table>
http://jsfiddle.net/37b793pz/4/
Can not be used more than once the same id. For that use data-id attribute
HTML:
<table width="300px" height="150px" border="1">
<tr>
<th>Key</th>
<th>Value</th>
</tr>
<tr>
<td data-id="key1">data 1</td>
<td data-id="valaa">AA</td>
</tr>
<tr>
<td data-id="key1">data 1</td>
<td data-id="valbb">BB</td>
</tr>
<tr>
<td data-id="key1">data 1</td>
<td data-id="valcc">CC</td>
</tr>
<tr>
<td data-id="key2">data 2</td>
<td data-id="valdd">DD</td>
</tr>
<tr>
<td data-id="key2">data 2</td>
<td data-id="valee">EE</td>
</tr>
<tr>
<td data-id="key3">data 3</td>
<td data-id="valff">FF</td>
</tr>
<tr>
<td data-id="key4">data 4</td>
<td data-id="valff">FF</td>
</tr>
<tr>
<td data-id="key5">data 5</td>
<td data-id="valff">FF</td>
</tr>
</table>
</td>
</tr>
<tr>
<td colspan="3" style="padding-left: 0px; padding-right: 0px; padding-bottom: 0px"></td>
</tr>
</table>
JQ:
//merge cells in key column
function mergerKey() {
// prevents the same attribute is used more than once Ip
var idA = [];
// finds all cells id column Key
$('td[data-id^="key"]').each(function () {
var id = $(this).attr('data-id');
// prevents the same attribute is used more than once IIp
if ($.inArray(id, idA) == -1) {
idA.push(id);
// finds all cells that have the same data-id attribute
var $td = $('td[data-id="' + id + '"]');
//counts the number of cells with the same data-id
var count = $td.size();
if (count > 1) {
//If there is more than one
//then merging
$td.not(":eq(0)").remove();
$td.attr('rowspan', count);
}
}
})
}
//similar logic as for mergerKey()
function mergerVal() {
var idA = [];
$('td[data-id^="val"]').each(function () {
var id = $(this).attr('data-id');
if ($.inArray(id, idA) == -1) {
idA.push(id);
var $td = $('td[data-id="' + id + '"]');
var count = $td.size();
if (count > 1) {
$td.not(":eq(0)").remove();
$td.attr('rowspan', count);
}
}
})
}
mergerKey();
mergerVal();
Use below snippet of javascript. It should work fine for what you are looking.
<script type="text/javascript">
function mergeCommonCells(table, columnIndexToMerge){
previous = null;
cellToExtend = null;
table.find("td:nth-child("+columnIndexToMerge+")").each(function(){
jthis = $(this);
content = jthis.text();
if(previous == content){
jthis.remove();
if(cellToExtend.attr("rowspan") == undefined){
cellToExtend.attr("rowspan", 2);
}
else{
currentrowspan = parseInt(cellToExtend.attr("rowspan"));
cellToExtend.attr("rowspan", currentrowspan+1);
}
}
else{
previous = content;
cellToExtend = jthis;
}
});
};
mergeCommonCells($("#tableId"), 1);
</script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.10.1/jquery.min.js"></script>

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