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HTML

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HTML preprocessors can make writing HTML more powerful or convenient. For instance, Markdown is designed to be easier to write and read for text documents and you could write a loop in Pug.

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!
Insecure Resource

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CSS

About CSS Preprocessors

CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.

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CSS Base

About CSS Base

It's a common practice to apply CSS to a page that styles elements such that they are consistent across all browsers. We offer two of the most popular choices: normalize.css and a reset. Or, choose Neither and nothing will be applied.

Vendor Prefixing

About Vendor Prefixing

To get the best cross-browser support, it is a common practice to apply vendor prefixes to CSS properties and values that require them to work. For instance -webkit- or -moz-.

We offer two popular choices: Autoprefixer (which processes your CSS server-side) and -prefix-free (which applies prefixes via a script, client-side).

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JavaScript

About JavaScript Preprocessors

JavaScript preprocessors can help make authoring JavaScript easier and more convenient.

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Babel includes JSX processing.

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HTML 

              
                <div class="container-fluid">
<div class="row-fluid">
<div class="span12">

    <div class="page-header">
        <h3>Bootstrap</h3>
        <p>Responsive Moving Box Carousel Demo</p>
    </div>
        
    <div class="carousel slide" id="myCarousel">
        <div class="carousel-inner">
            <div class="item active">
                    <ul class="thumbnails">
                        <li class="span3">
                            <div class="thumbnail">
                                <a href="#"><img src="http://placehold.it/360x240" alt=""></a>
                            </div>
                            <div class="caption">
                                <h4>Praesent commodo</h4>
                				<p>Nullam Condimentum Nibh Etiam Sem</p>
                                <a class="btn btn-mini" href="#">&raquo; Read More</a>
                            </div>
                        </li>
                        <li class="span3">
                            <div class="thumbnail">
                                <a href="#"><img src="http://placehold.it/360x240" alt=""></a>
                            </div>
                            <div class="caption">
                                <h4>Praesent commodo</h4>
                				<p>Nullam Condimentum Nibh Etiam Sem</p>
                                <a class="btn btn-mini" href="#">&raquo; Read More</a>
                            </div>
                        </li>
                        <li class="span3">
                            <div class="thumbnail">
                                <a href="#"><img src="http://placehold.it/360x240" alt=""></a>
                            </div>
                            <div class="caption">
                                <h4>Praesent commodo</h4>
                				<p>Nullam Condimentum Nibh Etiam Sem</p>
                                <a class="btn btn-mini" href="#">&raquo; Read More</a>
                            </div>
                        </li>
                        <li class="span3">
                            <div class="thumbnail">
                                <a href="#"><img src="http://placehold.it/360x240" alt=""></a>
                            </div>
                            <div class="caption">
                                <h4>Praesent commodo</h4>
                				<p>Nullam Condimentum Nibh Etiam Sem</p>
                                <a class="btn btn-mini" href="#">&raquo; Read More</a>
                            </div>
                        </li>
                    </ul>
              </div><!-- /Slide1 --> 
            <div class="item">
                    <ul class="thumbnails">
                        <li class="span3">
                            <div class="thumbnail">
                                <a href="#"><img src="http://placehold.it/360x240" alt=""></a>
                            </div>
                            <div class="caption">
                                <h4>Praesent commodo</h4>
                				<p>Nullam Condimentum Nibh Etiam Sem</p>
                                <a class="btn btn-mini" href="#">&raquo; Read More</a>
                            </div>
                        </li>
                        <li class="span3">
                            <div class="thumbnail">
                                <a href="#"><img src="http://placehold.it/360x240" alt=""></a>
                            </div>
                            <div class="caption">
                                <h4>Praesent commodo</h4>
                				<p>Nullam Condimentum Nibh Etiam Sem</p>
                                <a class="btn btn-mini" href="#">&raquo; Read More</a>
                            </div>
                        </li>
                        <li class="span3">
                            <div class="thumbnail">
                                <a href="#"><img src="http://placehold.it/360x240" alt=""></a>
                            </div>
                            <div class="caption">
                                <h4>Praesent commodo</h4>
                				<p>Nullam Condimentum Nibh Etiam Sem</p>
                                <a class="btn btn-mini" href="#">&raquo; Read More</a>
                            </div>
                        </li>
                        <li class="span3">
                            <div class="thumbnail">
                                <a href="#"><img src="http://placehold.it/360x240" alt=""></a>
                            </div>
                            <div class="caption">
                                <h4>Praesent commodo</h4>
                				<p>Nullam Condimentum Nibh Etiam Sem</p>
                                <a class="btn btn-mini" href="#">&raquo; Read More</a>
                            </div>
                        </li>
                    </ul>
              </div><!-- /Slide2 --> 
            <div class="item">
                    <ul class="thumbnails">
                        <li class="span3">
                            <div class="thumbnail">
                                <a href="#"><img src="http://placehold.it/360x240" alt=""></a>
                            </div>
                            <div class="caption">
                                <h4>Praesent commodo</h4>
                				<p>Nullam Condimentum Nibh Etiam Sem</p>
                                <a class="btn btn-mini" href="#">&raquo; Read More</a>
                            </div>
                        </li>
                        <li class="span3">
                            <div class="thumbnail">
                                <a href="#"><img src="http://placehold.it/360x240" alt=""></a>
                            </div>
                            <div class="caption">
                                <h4>Praesent commodo</h4>
                				<p>Nullam Condimentum Nibh Etiam Sem</p>
                                <a class="btn btn-mini" href="#">&raquo; Read More</a>
                            </div>
                        </li>
                        <li class="span3">
                            <div class="thumbnail">
                                <a href="#"><img src="http://placehold.it/360x240" alt=""></a>
                            </div>
                            <div class="caption">
                                <h4>Praesent commodo</h4>
                				<p>Nullam Condimentum Nibh Etiam Sem</p>
                                <a class="btn btn-mini" href="#">&raquo; Read More</a>
                            </div>
                        </li>
                        <li class="span3">
                            <div class="thumbnail">
                                <a href="#"><img src="http://placehold.it/360x240" alt=""></a>
                            </div>
                            <div class="caption">
                                <h4>Praesent commodo</h4>
                				<p>Nullam Condimentum Nibh Etiam Sem</p>
                                <a class="btn btn-mini" href="#">&raquo; Read More</a>
                            </div>
                        </li>
                    </ul>
              </div><!-- /Slide3 --> 
        </div>
        
        <div class="control-box">                            
            <a data-slide="prev" href="#myCarousel" class="carousel-control left">‹</a>
            <a data-slide="next" href="#myCarousel" class="carousel-control right">›</a>
        </div><!-- /.control-box -->   
                              
    </div><!-- /#myCarousel -->
        
</div><!-- /.span12 -->          
</div><!-- /.row --> 
</div><!-- /.container -->

                            
<!-- Delete This -->                        
<div class="footer">
<a href="http://simonalex.com/">&hearts; Redfrost</a> | <a href="https://twitter.github.com/bootstrap/">Get Bootstrap</a> | <a href="http://placehold.it/">Get Placeholder</a>   
    <p class="right">&lsaquo; Resize Window &rsaquo;</p>
    <p>&nbsp;</p>
    <p><strong>*VISIT THIS LINK FOR IE9 FIX: <a href="https://codepen.io/redfrost/pen/yKAmc"  target="_blank">https://codepen.io/redfrost/pen/yKAmc</a>
        
        
<strong></p>    
</div>
!

CSS 

              
                /* Global */
body {
    background: #3399cc;
    padding: 40px;
}  

img { max-width:100%; }

a {
	-webkit-transition: all 150ms ease;
	-moz-transition: all 150ms ease;
	-ms-transition: all 150ms ease;
	-o-transition: all 150ms ease;
	transition: all 150ms ease; 
	}
    a:hover {
        -ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=50)"; /* IE 8 */
        filter: alpha(opacity=50); /* IE7 */
        opacity: 0.6;
        text-decoration: none;
    }


/* Container */
.container-fluid {
    background: #FFFFFF;
    margin: 40px auto 10px;
    padding: 20px 40px 0;
    max-width: 960px;
    box-shadow: 0 1px 1px rgba(0, 0, 0, 0.1);
}


/* Page Header */
.page-header {
    background: #f9f9f9;
    margin: -30px -40px 40px;
    padding: 20px 40px;
    border-top: 4px solid #ccc;
    color: #999;
    text-transform: uppercase;
    }
    .page-header h3 {
        line-height: 0.88rem;
        color: #000;
        }



/* Thumbnail Box */
.caption h4 {
    font-size: 1rem;
    color: #444;
    }
    .caption p {
        font-size: 0.75rem;
        color: #999;
        }
        .btn.btn-mini {
            font-size: 0.63rem;
            }


/* Carousel Control */
.control-box {
    text-align: right;
    width: 100%;
    }
    .carousel-control{
        background: #666;
        border: 0px;
        border-radius: 0px;
        display: inline-block;
        font-size: 34px;
        font-weight: 200;
        line-height: 18px;
        opacity: 0.5;
        padding: 4px 10px 0px;
        position: static;
        height: 30px;
        width: 15px;
        }


/* Footer */
.footer {
    margin: auto;
    width: 100%;
    max-width: 960px;
    display: block;
    font-size: 0.69rem;
    }
    .footer, .footer a {
        color: #c9e4f7;
        }
        p.right  { 
            float: right; 
            }


/* Mobile Only */
@media (max-width: 767px) {
    .page-header, .control-box {
    text-align: center;
    } 
}
@media (max-width: 479px) {
    .caption {
    word-break: break-all;
    }
}


/* ADD-ON
-------------------------------------------------- */
body:after{content:"less than 320px";font-size:1rem;font-weight:bold;position:fixed;bottom:0;width:100%;text-align:center;background-color:hsla(1,60%,40%,0.7);color:#fff;height:20px;padding-top:0;margin-left:0;left:0}@media only screen and (min-width:320px){body:after{content:"320 to 480px";background-color:hsla(90,60%,40%,0.7);height:20px;padding-top:0;margin-left:0}}@media only screen and (min-width:480px){body:after{content:"480 to 768px";background-color:hsla(180,60%,40%,0.7);height:20px;padding-top:0;margin-left:0}}@media only screen and (min-width:768px){body:after{content:"768 to 980px";background-color:hsla(270,60%,40%,0.7);height:20px;padding-top:0;margin-left:0}}@media only screen and (min-width:980px){body:after{content:"980 to 1024px";background-color:hsla(300,60%,40%,0.7);height:20px;padding-top:0;margin-left:0}}@media only screen and (min-width:1024px){body:after{content:"1024 and up";background-color:hsla(360,60%,40%,0.7);height:20px;padding-top:0;margin-left:0}}

::selection { background: #ff5e99; color: #FFFFFF; text-shadow: 0; }
::-moz-selection { background: #ff5e99; color: #FFFFFF; }

a, a:focus, a:active, a:hover, object, embed { outline: none; }
:-moz-any-link:focus { outline: none; }
input::-moz-focus-inner { border: 0; }
!

JS 

              
                // Carousel Auto-Cycle
  $(document).ready(function() {
    $('.carousel').carousel({
      interval: 6000
    })
  });
!
999px

Console