A Full Screen Bootstrap Carousel with Random Initial Image

A few months ago, I wrote an article that covered Bootstrap’s Affix and ScrollSpy components. This time though, I’ll be focused on a different Bootstrap component: I’ll go through the process of building two simple extensions for the the Bootstrap carousel.

First, I’ll create a full-screen slideshow and then I’ll show you how to randomize the first slide on page load.

But before digging into those extensions, let’s start by creating a carousel based on the default styles.

Building the Carousel

To create the carousel, we’ll take advantage of the basic code for the carousel component that Bootstrap provides:

[code language="html"]
<div id="mycarousel" class="carousel slide" data-ride="carousel">
<!-- Indicators -->
<ol class="carousel-indicators">
<li data-target="#mycarousel" data-slide-to="0" class="active"></li>
<li data-target="#mycarousel" data-slide-to="1"></li>
<li data-target="#mycarousel" data-slide-to="2"></li>
<li data-target="#mycarousel" data-slide-to="3"></li>
<li data-target="#mycarousel" data-slide-to="4"></li>
</ol>

<!-- Wrapper for slides -->
<div class="carousel-inner" role="listbox">
<div class="item active">
<img src="1.jpg" data-color="lightblue" alt="First Image">
<div class="carousel-caption">
<h3>First Image</h3>
</div>
</div>
<div class="item">
<img src="2.jpg" data-color="firebrick" alt="Second Image">
<div class="carousel-caption">
<h3>Second Image</h3>
</div>
</div>
<!-- more slides here -->
</div>

<!-- Controls -->
<a class="left carousel-control" href="#mycarousel" role="button" data-slide="prev">
<span class="glyphicon glyphicon-chevron-left" aria-hidden="true"></span>
<span class="sr-only">Previous</span>
</a>
<a class="right carousel-control" href="#mycarousel" role="button" data-slide="next">
<span class="glyphicon glyphicon-chevron-right" aria-hidden="true"></span>
<span class="sr-only">Next</span>
</a>
</div>
[/code]

Notice that each of our images contains the custom data-color attribute. Later we’ll use its value as a fallback in case the corresponding image fails to load.

The next step is to initialize the carousel via JavaScript and modify the predefined values of the interval and pause configuration properties. Take note that we choose to set the value of the pause property to false because we always want the cycling to be active:

[code language="javascript"]
$('.carousel').carousel({
interval: 6000,
pause: "false"
});
[/code]

Having followed those simple steps (and of course imported the required files), we should now be able to build the first version of the carousel. Here’s how it looks so far:

See the Pen A Basic Bootstrap Carousel by SitePoint (@SitePoint) on CodePen.

Creating Full-screen Slides

At this point we’ll go one step further, converting the existing carousel into a full-screen slideshow. To implement this updated version we have to add some custom jQuery:

Continue reading %A Full Screen Bootstrap Carousel with Random Initial Image%

by George Martsoukos via SitePoint