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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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Adding Classes

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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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Packages

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Search for and use JavaScript packages from npm here. By selecting a package, an import statement will be added to the top of the JavaScript editor for this package.

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HTML 

              
                <a href="http://reportcard.rileyh.com/">* This is now an open source jQuery plugin</a>
<!-- Badges Container -->
<div class="badge-container">
  
  <!-- Title Markup -->
  <h1 id="treehouse-count"></h1>
  
  <!-- ul tag where badge li's are appended -->
  <ul id="badges"></ul>
</div>
!

CSS 

              
                /* Controls width of the widget */
.badge-container {width:700px; margin: 0 auto;}

/* Makes Badges display inline */
#badges li { display: inline;}

/* Controls badges row offset. THIS FUNCTION WILL CHANGE BASED ON THE NUMBER OF BADGES PER ROW */
/* Indent 30px every eleventh badge, repeat every 20 badges */
#badges li:nth-child(20n+11) {margin-left:30px;}

/* Controls badges size and alignment */
#badges li img {
  width: 60px; 
  margin:-17px 2px 0px 0px;
}

/* Controls Header Formatting */
.badge-container h1 {
  text-align:center; 
  font-family: 'Helvetica Neue'; 
  font-weight: bold; 
  -webkit-font-smoothing: antialiased;
}

/* Controls badges on-hover opacity */
#badges li img:hover {opacity:.7;}
!

JS 

              
                // When Document is ready, build treehouse Badge Widget 
$(document).ready(function () {

  // Replace the value for var 'e' with your Treehouse Username
  var e = "rileyhilliard",
  
  // Treehouse Json 
  t = "https://teamtreehouse.com/" + e + ".json",
  
  // Badges JQuery Identifier    
  n = $("#badges"),
  
  // Badges Array    
  r = [],
  
  // Badges Count
  i = 0;
  
  // Json Parse Treehouse User Badges Info
  $.getJSON(t, function (e) {
    
    // User Json Parse Select Badges Info
  	var t = e.badges;
    
    // Construct Each badge's HTML
  	$.each(t, function (e, t) {
  	 r += '<li><a href="' + t.url + '" target="_blank"><img src="' + t.icon_url + '" alt="' + t.name + '" title="' + t.name + '"/></a></li>';
  		i++
  	});
    
    // Append Badge to #badges
  	n.append(r);
    
    // Header Badges count generator
  	$("#treehouse-count").append('I have earned ' + i + ' badges at Treehouse!');
  });
});
!
999px

Console