Advanced CSS Tables II – Using Mootools JavaScript For Alternate Row Colors

By  on  

As I discussed in Advanced CSS Tables - Using CSS3 For Alternate Row Colors, we will eventually be able to use the ":nth-child(argument)" pseudo-class in CSS3 to provide alternate row background colors. What do we use in the mean time? You can explicitly code your page using CSS classes to do the job, but that's far too painful if you aren't using server-side scripting. Even if you do use server-side scripting, your page could become quite bloated from rows and rows of "class='color-me'" in your code. I've put together a very simple MooTools snipped that will save you lots of programming time and download time for your users.

Adding the Code

There are three parts to the process: the CSS, the JavaScript, and the XHTML table we will create.

The CSS is rather easy. We'll create one class for the table (which will serve as an identifier -- we may not want all tables on the page to be shaded, right?) and two classes for the odd and even row formatting:

.shade-table	{ /* just to remind us we're using this -- we don't want to write over it later! */ }
.odd		{ background:#ccc; padding:3px; }
.even		{ background:#eee; padding:3px; }

Now that we've defined the CSS, we need to insert the Mootools JavaScript code into the <head> section of the page:

window.addEvent('domready', function() {
	var count = 0;
	$$('table.shade-table tr').each(function(el) {
		el.addClass(count++ % 2 == 0 ? 'odd' : 'even');
	});
});

Now we're set. The only remaining step is place the table with the designated class declaration to the body of the page:

<table class="shade-table" border="1" cellpadding="5" cellspacing="2"><tbody>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>2</td>
<td>2</td>
<td>2</td>
<td>2</td>
</tr>
<tr>
<td>3</td>
<td>3</td>
<td>3</td>
<td>3</td>
</tr>
<tr>
<td>4</td>
<td>4</td>
<td>4</td>
<td>4</td>
</tr>
<tr>
<td>5</td>
<td>5</td>
<td>5</td>
<td>5</td>
</tr>
</tbody></table>

Voila! Mootools' easy function make the entire process a snap. The only downside to this method is that a user with JavaScript disabled wont see the newly added background colors. It could be worth it to you to save the bandwidth depending on your website's audience.

Recent Features

  • By
    LightFace:  Facebook Lightbox for MooTools

    One of the web components I've always loved has been Facebook's modal dialog.  This "lightbox" isn't like others:  no dark overlay, no obnoxious animating to size, and it doesn't try to do "too much."  With Facebook's dialog in mind, I've created LightFace:  a Facebook lightbox...

  • By
    Chris Coyier&#8217;s Favorite CodePen Demos

    David asked me if I'd be up for a guest post picking out some of my favorite Pens from CodePen. A daunting task! There are so many! I managed to pick a few though that have blown me away over the past few months. If you...

Incredible Demos

  • By
    CSS Counters

    Counters.  They were a staple of the Geocities / early web scene that many of us "older" developers grew up with;  a feature then, the butt of web jokes now.  CSS has implemented its own type of counter, one more sane and straight-forward than the ole...

  • By
    Create a 3D Animating Sidebar

    Mozilla's Christian Heilmann is an evangelist that knows how to walk the walk as well as talk the talk.  You'll often see him creating sweet demos on his blog or the awesome Mozilla Hacks blog.  One of my favorite pieces...

Discussion

  1. You don’t need count. Array::each has a second argument, the index (and a third, the Array itself).

    MooTools 1.11:

    $$(’table.shade-table tr’).each(function(el, i) {
        el.addClass((i % 2) ? ‘even’ : ‘odd’);
    });
    

    MooTools 1.2 (dev)

    $$(’table.shade-table tr:odd’).addClass(‘odd’);
    
  2. Thank you for your post and insights digitarald! Taking the count var out of play will make the code a little cleaner and easier.

    I’ve enjoyed your work with MooTools and continued success!

  3. Puneet Madaan

    you don’t need that heavy increment loop.. All new Browsers have inbuilt capability for this.

    in mootools way, a easy way to achived by..

    $$('tr:even').setStyle('background-color', '#ccc');
    $$('tr:even').setStyle('background-color', '#eee');
    
  4. Puneet Madaan

    anyways, this site offers great resources :) will visit it often :)

Wrap your code in <pre class="{language}"></pre> tags, link to a GitHub gist, JSFiddle fiddle, or CodePen pen to embed!