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th's width in thead doesn't match td width of tbody

I want to empty the content of my table td, to make a loading and then show latest fetched data, but the problem is the thead seem have some flickering issue, as the width of thead is affected when tbody data is gone.
table {
border-collapse: collapse;
}
table th,
table td {
padding: 5px;
border: 1px solid;
}
demo:
https://jsfiddle.net/nLrpbz9r/1/

This is normal... display: none elements are not involved in table width calculation. You can use visibility: collapse instead:
$(function() {
$('button').click(function() {
const $tb = $("tbody");
const new_visibility = $tb.css("visibility") === "visible" ? "collapse" : "visible";
$("tbody").css({
"visibility": new_visibility
});
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<button>Toggle tbody</button>
<table border="1">
<thead>
<tr>
<th>name</th>
<th>age</th>
</tr>
</thead>
<tbody>
<tr>
<td>john wesley</td>
<td>18</td>
</tr>
</tbody>
</table>
Unfortunately... when you insert new data in tbody, the widths will change depending on content. There is no good solution except using a fixed layout table.

add something like table th {min-width: 100px;} to your CSS.
$(function() {
$('button').click(function() {
const tb = $('tbody').clone()
if ($(tb).length > 0) {
$('tbody').hide()
}
})
})
table {
border-collapse: collapse;
}
table th,
table td {
padding: 5px;
border: 1px solid;
}
table th {min-width: 100px;}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<table>
<thead>
<tr>
<th>name</th>
<th>age</th>
</tr>
</thead>
<tbody>
<tr>
<td>john wesley</td>
<td>18</td>
</tr>
</tbody>
</table>
<button>Hide tbody</button>

I guess this two attribute which I set, we'll solve your problem:
table th,
table td {
padding: 5px;
border: 1px solid;
width: 200px;
text-align: center;
}
The last two lines fix the width of each td width the value you want ( Instead of 200 px and it's better to set it by percent value to support the responsibility) and the last line just put the text in center position. If you press the button, the Header cells will not change.

Why doesn't `tbody` set the background color in a table?

I am using <tbody> as a CSS selector to set the background-color in a table. I'm doing this because I have multiple <tbody> sections within the table, and they have different background colors.
My issue is that when using border-radius on the cells, the cell doesn't respect the background-color of the tbody. That is, the border radius cuts out the corners in the default background color (in this case white), not the tbody color (in this case, green), below.
UPDATE: This problem occurs in Chrome/Safari, but not in Firefox (just tested myself on all 3). Still looking for a workaround on Chrome (FOUND! See accepted answer).
tr:first-child td:first-child {
background-color: red;
border-radius: 25px;
}
table {
border-spacing: 0px;
}
table tbody {
background-color: green;
}
<table>
<tbody>
<tr>
<td><p>TOP LEFT</p></td>
<td><p>TOP RIGHT</p></td>
</tr>
<tr>
<td><p>BOT LEFT</p></td>
<td><p>BOT RIGHT</p></td>
</tr>
</tbody>
</table>
To be clear, the fix I'm looking for would change the resultant example so it looks like this (I'm just changing the table tbody selector to table only):
tr:first-child td:first-child {
background-color: red;
border-radius: 25px;
}
table {
border-spacing: 0px;
}
table { /* changed this line */
background-color: green;
}
<table>
<tbody>
<tr>
<td><p>TOP LEFT</p></td>
<td><p>TOP RIGHT</p></td>
</tr>
<tr>
<td><p>BOT LEFT</p></td>
<td><p>BOT RIGHT</p></td>
</tr>
</tbody>
</table>
I don't want to do it that way, because I want the background-color to be on the tbody (which I have multiple ones) NOT on the whole table.
Any way to make the tbody color show through?

Try making the <tbody> to render like a block element.
tbody {
background-color: green;
display: block;
}
tr:first-child td:first-child {
background-color: red;
border-radius: 25px;
}
table {
border-spacing: 0px;
}
tbody {
background-color: green;
display: block;
}
<table>
<tbody>
<tr>
<td><p>TOP LEFT</p></td>
<td><p>TOP RIGHT</p></td>
</tr>
<tr>
<td><p>BOT LEFT</p></td>
<td><p>BOT RIGHT</p></td>
</tr>
</tbody>
</table>

An updated answer for other users, if it helps.
On Chrome, the display: block fixes the issue. However, it causes other layout issues with the table, where it does not seem to respect widths. Using display: table instead seems to resolve both issues:
tbody {
background-color: green;
display: table;
}

Set cellspacing to 0, borders on the table to none, and collapse the table borders (to make sure there is not space around the colored boxes). Then apply the background color to the TD elements instead of the tbody element.

Hovering on one table cell will highlight previous cells in a row

I have a table with different cell size. I was trying to make something like if I hover a cell, only previous cells in a row will be highlighted.
JS FIddle
From the example you will see that Item + Item a + item j have gray background it explain that I am now hovering on cell "item j" and previous cells are also highlighted.
Like this if I hover on the item b it will highlight item b, item a and item.
if I hover on the first cell item it will only highlight on item as there is no previous cell.
Also same for the Item 1 , item 2 and item 3.
I am not good in jQuery and because of that I failed to build any logic to create this.
If anyone helps me on this that would be much helpful for me.
HTML
<table class="table-style" width="100%" border="0" cellspacing="0" cellpadding="0" >
<tr>
<td class="active" rowspan="4"><p>Item</p></td>
<td ><p>Item 1</p></td>
<td ><p>Item 2</p></td>
<td ><p>Item 3</p></td>
</tr>
<tr>
<td class="active" rowspan="3"><p>Items a</p></td>
<td class="active" rowspan="3"><p>Items b</p></td>
<td ><p>Items i</p></td>
</tr>
<tr>
<td class="active"><p>Items j</p></td>
</tr>
<tr>
<td><p>Items k</p></td>
</tr>
</table>
CSS
.table-style{
margin-bottom:15px;
}
.table-style td{
border-collapse: collapse;
border: 1px solid #ddd;
text-align: center;
padding: 5px 0px;
}
.table-style td p {
font-size: 13px;
color: #454545;
font-weight: normal;
}
.table-style td p a {
color: #8d8d8d;
text-decoration:none;
}
.table-style td.active{
background: #ddd;
border: solid 2px #C9C9C9;
}
.table-style td.active p a{
color: #000;
font-weight:bold;
}
.table-style td p a:hover {
color: #000;
text-decoration:underline;
}
[Sorry for my bad English]

I've modified your fiddle so that it works now here: http://jsfiddle.net/BHVv6/4/
Your table cells are organized in a weird way where it's hard to get a clear idea of who the parents are so I had to map out the parent structure manually by using this:
parentMap = {
"itemOrig": false,
"item1": "itemOrig",
"item2": "item1",
"item3": "item2",
"itemI": "itemB",
"itemJ": "itemB",
"itemK": "itemB",
"itemB": "itemA",
"itemA": "itemOrig"
};

You can define a class that gets applied to all previous table-cells when one is hovered like this:
jQuery
$('.table-style td').hover(
function(){
$(this).prevAll().addClass('hover');
},
function(){
$(this).prevAll().removeClass('hover');
}
);
CSS
.hover{font-weight: bold} /* or whatever the "highlighting needs to be */

Styling tables using CSS

I have a problem with styling tables using CSS.
So I have a table in my HTML file:
<table class="altrowstable" id="alternatecolor">
<tr>
<th>Info Header 1</th><th>Info Header 2</th><th>Info Header 3</th>
</tr>
<tr>
<td>Text 1A</td><td>Text 1B</td><td>Text 1C</td>
</tr>
<tr>
<td>Text 2A</td><td>Text 2B</td><td>Text 2C</td>
</tr>
<tr>
<td>Text 3A</td><td>Text 3B</td><td>Text 3C</td>
</tr>
<tr>
<td>Text 4A</td><td>Text 4B</td><td>Text 4C</td>
</tr>
<tr>
<td>Text 5A</td><td>Text 5B</td><td>Text 5C</td>
</tr>
</table>
Here is my JavaScript file:
function altRows(id){
if(document.getElementsByTagName){
var table = document.getElementById(id);
var rows = table.getElementsByTagName("tr");
for(i = 0; i < rows.length; i++){
if(i % 2 == 0){
rows[i].className = "evenrowcolor";
}else{
rows[i].className = "oddrowcolor";
}
}
}
}
window.onload=function(){
altRows('alternatecolor');
}
And here is my CSS file:
table.altrowstable {
font-family: verdana,arial,sans-serif;
font-size:11px;
color:#333333;
border-width: 1px;
border-color: #a9c6c9;
border-collapse: collapse;
}
table.altrowstable th {
border-width: 1px;
padding: 8px;
border-style: solid;
border-color: #a9c6c9;
}
table.altrowstable td {
border-width: 1px;
padding: 8px;
border-style: solid;
border-color: #a9c6c9;
}
table.oddrowcolor{
background-color:#d4e3e5;
}
table.evenrowcolor{
background-color:#c3dde0;
}
The problem is that it is not changing color neither odd rows nor even odd.
What am I doing wrong?
Thanks.

I'll provide you a CSS solution for this:
table.class_name tr:nth-child(odd) {
/* Styles */
}
table.class_name tr:nth-child(even) {
/* Styles */
}
That's all you need, although it’s not supported in IE 8 and earlier.
Demo
For your table headers, you can simply use a different selector to over ride the background styles like
table.altrowstable tr th {
background: #fff;
}
Demo 2

I did check your code and found a little correction iin the css is needed to get the expected solution. There should be an empty space between the table and row classname.
table .oddrowcolor{
background-color:#d4e3e5;
}
table .evenrowcolor{
background-color:#c3dde0;
}

I like to provide solutions that dont tinker or modify the original source much.
Your HTML is fine, JScript is fine(very fine). Good to see that you use the .classname so that is is cross brwoser compatible.So all i did is change the classes for the CSS
YOUR CODE
table.oddrowcolor {
background-color:#d4e3e5;
}
table.evenrowcolor {
background-color:#c3dde0;
}
MY CHANGE
tr.oddrowcolor {
background-color:#d4e3e5;
}
tr.evenrowcolor {
background-color:#c3dde0;
}
WORKING FIDDLE
total change from your code to mine. 8 characters. Simple ain't it?

You have a problem within your CSS. You are setting the class for table, while as it should be for td.
You also need to modify your below js as style can be applied to td and not to tr
var rows = table.getElementsByTagName("td");
Here is the problem in your CSS
table.oddrowcolor{
background-color:#d4e3e5;
}
table.evenrowcolor{
background-color:#c3dde0;
}
You should be using this instead
table td.oddrowcolor{
background-color:#d4e3e5;
}
table td.evenrowcolor{
background-color:#c3dde0;
}
jsFiddle

Try this one ...see the Demo
tr:nth-child(even) {background: #CCC}
tr:nth-child(odd) {background: #FFF}

HTML Table with vertical rows

How do I make vertical tables in HTML? By vertical, I mean the rows will be vertical with table headers on the left.
I also need it the way so I can access these rows (in this case vertical) as in a normal table, with <tr>. This is because I get the data dynamically for one row (like for row A) and insert it in the table. I am using angularJS to avoid DOM manipulation, so I am not looking for complex DOM manipulation with Javascript.

If you want <tr> to display columns, not rows, try this simple CSS
tr { display: block; float: left; }
th, td { display: block; }
This should display what you want as far as you work with single-line cells (table behavior is dropped).
/* single-row column design */
tr { display: block; float: left; }
th, td { display: block; border: 1px solid black; }
/* border-collapse */
tr>*:not(:first-child) { border-top: 0; }
tr:not(:first-child)>* { border-left:0; }
<table>
<tr>
<th>name</th>
<th>number</th>
</tr>
<tr>
<td>James Bond</td>
<td>007</td>
</tr>
<tr>
<td>Lucipher</td>
<td>666</td>
</tr>
</table>

David Bushell has provided a solution and implementation here: http://dbushell.com/demos/tables/rt_05-01-12.html
The trick is to use display: inline-block; on the table rows and
white-space: nowrap; on the table body.

AFAIK, there is no magic solution to switch this around.
As for a rotation(90deg), that would most likely turn the whole table to the side, similar to how a sheet of paper would look if you turned in 90 degrees, and that's not what you want (I think?).
If this is possible (and realistic), I would suggest changing it in the HTML itself.
As indicated in the comments, there is no suggestion here, so here's a basic javascript alternative [even if this is not what you were looking for] using jQuery. Without knowing your experience, I've taken the time to comment everything to be sure you get what the code is doing.
// Change the selector to suit your needs
$('table').each(function(){
var table = $(this), // Reference each table in the page
header = $('thead', table), // Reference the table head
headings = []; // Set an array for each column
// If the table doesn't have a header, use it's footer for column titles
if(!header.length)
header = $('tfoot', table);
// If there's no header nor footer, skip to the next table
if(!header.length)
continue;
// Loop each heading to get the header value
$('th', header).each(function(){
var heading = $(this).html(); // Each heading value content, including any HTML; use .text() to use the text only
headings.push(heading); // Add heading value to array
});
// Make sure the content is wrapped in a tbody element for proper syntax
if(!$('tbody', table).length)
table.wrapInner('<tbody></tbody>');
// Set counter to reference the heading in the headings array
var x = 0;
// Loop through each row in the table
$('tbody tr').each(function(){
var row = $(this),
label = headings[x];
// Add the heading to the row, as a <th> for visual cues (default: bold)
row.prepend('<th>'+label+'</th>')
// Move to the next value in the headings value
x++;
});
});

You can use <th> as the first cell in the row.
Here's a fiddle: http://jsfiddle.net/w5nWG/
#vishesh so you want to transpose your table after DOM ready? try this http://gist.github.com/pgaertig/2376975
$(function() {
var t = $('#thetable tbody').eq(0);
var r = t.find('tr');
var cols= r.length;
var rows= r.eq(0).find('td').length;
var cell, next, tem, i = 0;
var tb= $('<tbody></tbody>');
while(i<rows){
cell= 0;
tem= $('<tr></tr>');
while(cell<cols){
next= r.eq(cell++).find('td').eq(0);
tem.append(next);
}
tb.append(tem);
++i;
}
$('#thetable').append(tb);
$('#thetable').show();
}

<table>
<tr><td>1</td></tr>
<tr><td>2</td></tr>
<tr><td>3</td></tr>
</table>
table { border-collapse: collapse; }
table tr { display: block; float: left; }
table tr tr{ display: block; float: left; }
table th, table td { display: block; border: none; }

try this
<table>
<thead>
<tr>
<th>id</th>
<th>column1</th>
<th>column2</th>
<th>column3</th>
<th>column4</th>
<th>column5</th>
</tr>
</thead>
<tbody>
<tr>
<td>1</td>
<td>2</td>
</tr>
</tbody>
</table>
css:
table, td, th {
border: 1px solid red;
}
thead {
float: left;
}
thead th {
display: block;
background: yellow;
}
tbody {
float: right;
}

Maybe this link won't help : rotate a table 90 degrees
neither would this one : http://www.w3.org/TR/html401/struct/tables.html
Otherwise, you can try this, has another user suggested (rejected and downvoted) :
table {
-webkit-transform: rotate(-90deg);
-moz-transform: rotate(-90deg);
-ms-transform: rotate(-90deg);
-o-transform: rotate(-90deg);
filter: progid:DXImageTransform.Microsoft.BasicImage(rotation=3);
}
This sounds silly, but hey, it's not worse than just not knowing the 'verry basic' HTML 4 table model.