Develop Reference

Hiding some columns if table is too big

I am a beginner in react and web apps in general let me know if anything is unclear.
I have the following table :
<div>
<table id="mytableid" className="some classes">
<thead>
<tr>
<th>Name</th>
<th>Address</th>
<th>Phone Number</th>
<th>Age</th>
<th>Sex</th>
<th>Blood Type</th>
</tr>
</thead>
<tbody>
<tr>
<td>John Doe</td>
<td>Some place somewhere</td>
<td>093-1252-4879</td>
<td>51</td>
<td>Male</td>
<td>AB</td>
</tr>
</tbody>
</table>
</div>
Let's say I want to hide Address and blood type if table is too big to fit in a div.
The way I am thinking of doing this is to check the size of the div and the table in componentDidMount
if the size of the table is bigger than the div then I will set the style of those two columns to display:none.
I did something similar for submenu transitions where I would change my component set on the componentDidMount to get the height then put the visibility to hidden by changing the state. I didn't notice any slowness neither can I see that the submenu was actually visible(on chrome)
I saw some people are doing things like for the nth column to not be displayed if the screen is too small using purely css which is nice. But in my case I am not sure if I could do something similar as I would like the user of my component to specify which columns to hide.
My question is if it is the usual way for webapp developers to display the component check the result on componentDidMount and then change how things look or is there a different pattern?

The one pattern I have seen is, removing items on demand in such cases, i.e. user has choice of which columns to see and which one to hide. Refer this dynamic-columns example from an open source.
http://uikernel.io/examples/dynamic-columns/

Column toggle not working when append the table rows dynamically

In jQuery mobile v 1.4.5 i used table rows append dynamically with column toggle but it does not work for the rows which are dynamically generated.
<table id="tab" data-role="table" data-mode="columntoggle" class="ui-responsive">
<tbody id="tb" >
<thead id="th">
<tr id="tr1">
<th>First</th>
<th data-priority="1">Second</th>
<th data-priority="2">third</th>
</tr>
</thead>
</tbody>
</table>
Here is the Fiddle what I tried.
I referred this jQuery mobile document.
Note: I want to insert the table rows at the top of the previous rows (dynamically added rows that why I used "after" property).

Edited:
New link is the below to locate created new row on the top of the table
http://jsfiddle.net/txej8qhj/6/
The below link works fine;
http://jsfiddle.net/txej8qhj/3/
Probably you too know. Sometimes we may overlook somethings. You should separate the thead and tbody element. Actually thead element first comes in a table like the below;
<table>
<thead>
</thead>
<tbody>
</tbody>
</table>
Check the below link out to use as guide;
http://demos.jquerymobile.com/1.4.5/table-column-toggle/#&ui-state=dialog

You need to call refresh and trigger create functions on the table element.
Please, try the below:
$("#tr1").after(newrow);
$('#tab').table("refresh").trigger("create");

Creating merged table cells using Twitter Bootstrap

How can we use Bootstrap to create <thead> with 2 levels (eg: Summer Period has hildren data1, data2, data3) and also table cells that merged 2 vertical cells (eg:State)?
Here's how it looks like in Excel:

I'm not sure how exactly to do it with Bootstrap, but I know how to do it in HTML:
You can use a combination of the colspan and rowspan attributes, where rowspan is used for table headers spanning multiple rows, and the same applies to colspan and columns.
Break up your table headers into rows, according to their levels.
So the first table row will consist of your "parent" headers, i.e. the headers that every other header and piece of data is going to fall under.
Your first row should have 3 columns: State, Utilities Company and Summer Period.
Add subsequent header rows for each level you drill down. Here, your next row will simply be the table headers for each data set.
Let's apply the attributes:
Your 1st th for State spans 2 rows, so we add rowspan="2".
The same applies to the next table header, Utilities Company.
Summer Period spans 1 row and 3 columns, so we add colspan="3"
Add another tr in the header, containing the 3 cells for data1, data2 and data3.
The resulting HTML looks like this:
<thead>
<tr>
<th rowspan="2">State</th>
<th rowspan="2">Utilities Company</th>
<th colspan="3">Summer Period</th>
</tr>
<tr>
<th>data1</th>
<th>data2</th>
<th>data3</th>
</tr>
</thead>
Here is a demo fiddle.
Here's an updated demo (actually reset as base) including bootstrap.css even though it literally does nothing demo fiddle updated.

Creating a complex header with multiple lines in Bootstrap is exactly as it is in HTML. Here is your table in HTML for Bootstrap:
<table class="table table-bordered">
<thread>
<tr>
<th>State</th>
<th>Utilities Company</th>
<th colspan="3">Summer Period</th>
</tr>
<tr>
<th></th>
<th></th>
<th>data1</th>
<th>data2</th>
<th>data3</th>
</tr>
</thread>
<tbody>
... data here ...
</tbody>
</table>
You may have to add some CSS between your first and second header row to display your data correctly

<table class="table table-bordered">
<thread>
<tr>
<th rowspan="2">State</th>
<th rowspan="2">Utilities Company</th>
<th colspan="3">Summer Period</th>
</tr>
<tr>
<th>data1</th>
<th>data2</th>
<th>data3</th>
</tr>
</thread>
<tbody>
... data here ...
</tbody>
</table>

Adding table column dividers without distorting column data?

Is there an easy way to create vertical dividers between HTML table columns? I want to add thick bars, but the only good way I've seen to do this is to distort table data add TD's.
Is there a way to add vertical dividers between columns of a table using only jQuery+CSS?
My table structure is pretty simple.
<table>
<thead><tr><th>...</tr></thead>
<tbody><tr>...</tr>...</tbody>
</table>

what you are searching for is a attribute for the tag and it is called rules:
http://www.htmlcodetutorial.com/tables/_TABLE_RULES.html
<table rules="cols">
<thead><tr><th>...</tr></thead>
<tbody><tr>...</tr>...</tbody>
</table>
You can style it using the css border properties. But the advantage over using a border on every cell is the fact that it will not add a border at the right side of the table (or the last cell actually) so you don't have to add a special class to the last cell to overwrite the border.
EDIT: Add the attribute border="0" to the tag if you don't want a border around the whole table (or not left/right of the first/last column).
EXAMPLE: http://jsbin.com/ixire

Using the cell border is one option you can use but there's another:
I'm not sure if you can change your table structure but if you can, use the colgroup and col tags for table. I did a quick test in latest of FF, Chrome and Opera and it worked in all:
<style type="text/css">
table {
border:1px solid #ccc;
border-collapse:collapse;
}
.col {
border-right:10px solid blue;
}
</style>
<div id="tDiv">
<table border="1">
<colgroup class="col">
<col width="200" />
</colgroup>
<colgroup class="col">
<col width="200" />
</colgroup>
<thead>
<tr>
<th>one</th>
<th>two</th>
</tr>
</thead>
<tbody>
<tr>
<td>one one</td>
<td>one two</td>
</tr>
</tbody>
</table>
</div>
I did not get a change to test in IE (any versions of it) though.

Generally done with border on the right (or left) of each cell.
This -> http://jsfiddle.net/XFtBR/ should give you a start point.

Table - fixed header, scrollable body, most robust/simple solution? [duplicate]

This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
HTML table with fixed headers?
Looking for a solution to create a table with a scrollable body, and a static/fixed header.
Searching around seems to produce MANY flaky pieces of code, either not working in IE, requiring a huge amount of Javascript and tweaking, or a silly amount of CSS hacks etc.
To be honest, if it's a case of CSS hacks or Javascript, I think I'd prefer to go the Javascript option.
The alternative I guess is to place it all in a div, and just scroll the entire table - but that's a bit naff :D

I've just put together a jQuery plugin that does exactly what you want. Its very small in size and really easy to implement.
All that is required is a table that has a thead and tbody.
You can wrap that table in a DIV with a classname and the table will always resize to fit in that div. so for example if your div scales with the browser window so will the table. The header will be fixed when scrolling. The footer will be fixed (if you enable a footer). You also have the option to clone the header in the footer and have it fixed. Also if you make your browser window too small and all columns can't fit...it will also scroll horizontally (header too).
This plugin allows the browser to size the columns so they aren't fixed width columns.
you just pass the DIV's classname to the plugin like so: $('.myDiv').fixedHeaderTable({footer: true, footerId: 'myFooterId'}); and the plugin will do the rest. FooterID is a element on the page that contains the mark-up for your footer. this is used if you want to have pagination as your footer.
If you have multiple tables on the page it will also work for each table you want to have a fixed header.
check it out here: http://fixedheadertable.mmalek.com/
Keep in mind its still 'beta' so I am adding new features and bug fixes daily.
Supported browsers: IE6, IE7, IE8, FireFox, Safari, and Chrome
Here is a link to my response to another person who had the same question: Frozen table header inside scrollable div

<table style="width: 300px" cellpadding="0" cellspacing="0">
<tr>
<td>Column 1</td>
<td>Column 2</td>
</tr>
</table>
<div style="overflow: auto;height: 100px; width: 320px;">
<table style="width: 300px;" cellpadding="0" cellspacing="0">
<tr>
<td>Value 1</td>
<td>Value 2</td>
</tr>
<tr>
<td>Value 1</td>
<td>Value 2</td>
</tr>
<tr>
<td>Value 1</td>
<td>Value 2</td>
</tr>
<tr>
<td>Value 1</td>
<td>Value 2</td>
</tr>
<tr>
<td>Value 1</td>
<td>Value 2</td>
</tr>
<tr>
<td>Value 1</td>
<td>Value 2</td>
</tr>
</table>
</div>
This creates a fixed column header with the scrollable table below it. The trick is to embed the table you want to scroll in a tag with the overflow attribute set to auto. This will force the browser to display a scrollbar when the contents of the inner table are larger than the height of the surrounding .
The width of the outer must be larger than the width if the inner table to accommodate for the scrollbar. This may be difficult to get exactly right, because some users may have set their scrollbars to be wider or smaller than the default. However, with a difference of around 20 to 30 pixels you'll usually be able to display the scrollbar just fine.
CSS-Tricks also talks about using JavaScript and CSS to help with this as well so you can use highlighting. Here is the link to that article.

If you can fix the column widths - it's a lot easier. If you want the browser to figure out the widths, it gets a lot harder. Basically, have the table in div that scrolls (height, overflow:auto) and have that div inside a position:relative div. In the outer div, have another div position:absolute, overflow:hidden, height: whatever the header height is, set this div's innerHTML to the innerHTML of the inner div; Here is a page that demonstrates. There are lots of gotchas, but it's doable...
<html>
<head></head>
<body onload="doit();">
<div id="outer" style="position:relative;">
<div id="inner" style="height:100px; overflow:auto;">
<script>
var html = '<table><tr><th>Heading 1</th><th>Heading 2</th></tr>';
var width = Math.floor(Math.random() * 100);
var d = '';
for(var i = 0; i < width; i++){d += 'a';}
for(var i = 0; i < 100; i++){
html += '<tr><td>' + d + '</td><td>some more data</td>';
}
html += '</table>';
document.write(html);
</script>
</div>
<div id="secondWrapper" style="position:absolute; background:#fff; left:0; top:0; height:25px; overflow:hidden;"></div>
</div>
<script>
function doit(){
var inner = document.getElementById('inner');
var secondWrapper = document.getElementById('secondWrapper');
secondWrapper.innerHTML = inner.innerHTML;
}
</script>
</body>
</html>
Note as you refresh and the data size changes, the header matches up perfectly. That's the real trick.

I believe that the solution is to set an explicit height for the tbody and set the overflow to auto or scroll. Unfortunately, as you've discovered, tables and CSS are a tricky combination, and IE likes to choke on it.

How about this:
<table style="width: 400px;">
<thead><tr> <th> head </th> </tr>
</thead>
<tbody style="height: 100px; overflow-y: auto; overflow-x: hidden;">
<tr> <th> .. </th> </tr>
</tbody>
</table>

There was also a quiz for just this sort of thing on Sitepoint, for those looking for a non-JS solution. However I found that the table footer was necessary for stopping the table headers from collapsing their widths IF the contents of the cells weren't wide enough. I ended up hiding the tfoot in the application I used this on.
It's pure HTML/CSS and works in IE6 plus modern browsers. There are some styling limitations for the header though.