Pen Settings



CSS Base

Vendor Prefixing

Add External Stylesheets/Pens

Any URL's added here will be added as <link>s in order, and before the CSS in the editor. If you link to another Pen, it will include the CSS from that Pen. If the preprocessor matches, it will attempt to combine them before processing.

+ add another resource


Babel includes JSX processing.

Add External Scripts/Pens

Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

+ add another resource


Add Packages

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.


Save Automatically?

If active, Pens will autosave every 30 seconds after being saved once.

Auto-Updating Preview

If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.

Format on Save

If enabled, your code will be formatted when you actively save your Pen. Note: your code becomes un-folded during formatting.

Editor Settings

Code Indentation

Want to change your Syntax Highlighting theme, Fonts and more?

Visit your global Editor Settings.


                <h2>Collapsible Directory List</h2>

<div class="box">
  <ul class="directory-list">


                /* Demo page styles
-------------------------------------------------------------- */

body {
  background: #eee;
  font-family: "times new roman", serif;
  line-height: 30px;

h2 {
  color: #aaa;
  font-size: 30px;
  line-height: 40px;
  font-style: italic;
  font-weight: 200;
  margin: 40px;
  text-align: center;
  text-shadow: 1px 1px 1px rgba(255, 255, 255, 0.7);

.box {
  background: #fff;
  border-radius: 2px;
  box-shadow: 0 0 50px rgba(0, 0, 0, 0.1);
  margin: 30px 5%;
  padding: 5%;

@media (min-width: 544px) {
  .box {
    margin: 40px auto;
    max-width: 440px;
    padding: 40px;

/* The list style
-------------------------------------------------------------- */

.directory-list ul {
  margin-left: 10px;
  padding-left: 20px;
  border-left: 1px dashed #ddd;

.directory-list li {
  list-style: none;
  color: #888;
  font-size: 17px;
  font-style: italic;
  font-weight: normal;

.directory-list a {
  border-bottom: 1px solid transparent;
  color: #888;
  text-decoration: none;
  transition: all 0.2s ease;

.directory-list a:hover {
  border-color: #eee;
  color: #000;

.directory-list .folder,
.directory-list .folder > a {
  color: #777;
  font-weight: bold;

/* The icons
-------------------------------------------------------------- */

.directory-list li:before {
  margin-right: 10px;
  content: "";
  height: 20px;
  vertical-align: middle;
  width: 20px;
  background-repeat: no-repeat;
  display: inline-block;
  /* file icon by default */
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='' viewBox='0 0 100 100'><path fill='lightgrey' d='M85.714,42.857V87.5c0,1.487-0.521,2.752-1.562,3.794c-1.042,1.041-2.308,1.562-3.795,1.562H19.643 c-1.488,0-2.753-0.521-3.794-1.562c-1.042-1.042-1.562-2.307-1.562-3.794v-75c0-1.487,0.521-2.752,1.562-3.794 c1.041-1.041,2.306-1.562,3.794-1.562H50V37.5c0,1.488,0.521,2.753,1.562,3.795s2.307,1.562,3.795,1.562H85.714z M85.546,35.714 H57.143V7.311c3.05,0.558,5.505,1.767,7.366,3.627l17.41,17.411C83.78,30.209,84.989,32.665,85.546,35.714z' /></svg>");
  background-position: center 2px;
  background-size: 60% auto;

.directory-list li.folder:before {
  /* folder icon if folder class is specified */
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='' viewBox='0 0 100 100'><path fill='lightblue' d='M96.429,37.5v39.286c0,3.423-1.228,6.361-3.684,8.817c-2.455,2.455-5.395,3.683-8.816,3.683H16.071 c-3.423,0-6.362-1.228-8.817-3.683c-2.456-2.456-3.683-5.395-3.683-8.817V23.214c0-3.422,1.228-6.362,3.683-8.817 c2.455-2.456,5.394-3.683,8.817-3.683h17.857c3.422,0,6.362,1.228,8.817,3.683c2.455,2.455,3.683,5.395,3.683,8.817V25h37.5 c3.422,0,6.361,1.228,8.816,3.683C95.201,31.138,96.429,34.078,96.429,37.5z' /></svg>");
  background-position: center top;
  background-size: 75% auto;


                	// get all folders in our .directory-list
	var allFolders = $(".directory-list li > ul");
	allFolders.each(function() {

	  // add the folder class to the parent <li>
	  var folderAndName = $(this).parent();

	  // backup this inner <ul>
	  var backupOfThisFolder = $(this);
	  // then delete it
	  // add an <a> tag to whats left ie. the folder name
	  folderAndName.wrapInner("<a href='#' />");
	  // then put the inner <ul> back

	  // now add a slideToggle to the <a> we just added
	  folderAndName.find("a").click(function(e) {