cssAudio - Activefile-genericCSS - ActiveGeneric - ActiveHTML - ActiveImage - ActiveJS - ActiveSVG - ActiveText - Activefile-genericVideo - ActiveLovehtmlicon-new-collectionicon-personicon-teamlog-outoctocatpop-outspinnerstartv

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

You're using npm packages, so we've auto-selected Babel for you here, which we require to process imports and make it all work. If you need to use a different JavaScript preprocessor, remove the packages in the npm tab.

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

Use npm Packages

We can make npm packages available for you to use in your JavaScript. We use webpack to prepare them and make them available to import. We'll also process your JavaScript with Babel.

⚠️ This feature can only be used by logged in users.

Code Indentation


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.

              <p><a target="_top" href="https://codepen.io/romanrudenko/pen/mIKgr">Previous Step</a> 05.fluid <a target="_top" href="https://codepen.io/romanrudenko/pen/ujfgr">Next Step</a></p>

<div class="wrap">
  <div class="prop"></div>
  <div class="main">2.main<br>float:left<br>Fairly short text</div>
	<div class="realend">3.realend<br>position:relative</div>

<div class="wrap">
	<div class="prop"></div>
	<div class="main">2.main<br>float:left<br>Call me Ishmael.  Some years ago &ndash; never mind how long precisely &ndash; having little or no money in my purse, and nothing particular to interest me on shore, I thought I would sail about a little and see the watery part of the world.  It is a way I have of driving off the spleen, and regulating the circulation.</div>
	<div class="realend">3.realend<br>position:relative</div>
              html, body { margin: 0; padding: 0; font-family: sans-serif;}

.prop, .main, .end {
  opacity: 0.7;
.wrap {
	width: 50%; margin: 20px 20px 50px; height: 200px;
	line-height: 25px; border: 5px solid #AAA;

.prop {
	float: left;
	width: 5px; height: 200px; 
	background: #F0F; }
.main {
	float: right;
	width: 100%; 
	margin-left: -5px;
	background: #AFF; }
.realend {
	float: right; position: relative;
	top: -50px;	left: 100%;
	width: 100px; margin-left: -100px;
	padding-right: 5px;
	background: #FAA; font-size: 14px; }
              // In this step, we switch container widths to percentages to enable them to scale along with viewport. This is relatively easy, as negative margin on "realend" compensates for its width and thus allows the use of left: 100%.
🕑 One or more of the npm packages you are using needs to be built. You're the first person to ever need it! We're building it right now and your preview will start updating again when it's ready.
Loading ..................