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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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About the <head>

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Insecure Resource

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CSS

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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

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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. For instance, CoffeeScript can help prevent easy-to-make mistakes and offer a cleaner syntax and Babel can bring ECMAScript 6 features to browsers that only support ECMAScript 5.

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Babel is required to process package imports. If you need a different preprocessor remove all packages first.

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About External Resources

You can apply a script from anywhere on the web to your Pen. Just put a URL to it here and we'll add it, in the order you have them, before the JavaScript in the Pen itself.

If the script you link to has the file extension of a preprocessor, we'll attempt to process it before applying.

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HTML 

              
                <!--
 * Replace the iframes src attribute to test the same effect on other websites 
 *
 * ;)
 *
-->
<div class="main">
	<iframe height="3000" frameborder="0" scrolling="no" src="//www.ubuntu.com"></iframe>
	</div>
	<div class="blurred">
		<iframe height="3000" frameborder="0" scrolling="no" src="//www.ubuntu.com"></iframe>
		<p>Vague.js</p>
</div>
!

CSS 

              
                @import "compass/css3";

	@import url(https://fonts.googleapis.com/css?family=Satisfy);
	iframe{
		position:absolute;
		top:0;
		left:0;
		overflow:hidden;
		width:100%;
      /* fix for the stupid safari */
      -webkit-transform: translate3d(0,0,0);
	}
	iframe.main {
		position:absolute;
		height:100%;
		width:100%;
	}
	.blurred {
		box-shadow: 0 5px 50px rgba(0,0,0,0.4);
		overflow:hidden;
		position:fixed;
		bottom:-10px;
		left:0;
		height:200px;
		width:100%;
	}
	.blurred p {
		font-family: 'Satisfy', cursive;
		position:absolute;
		top:50px;
		width:100%;
		color:white;
		text-align: center;
		text-shadow:1px 1px 2px black;
		font-size:70px;
	}
!

JS 

              
                /**
*
* Author: Gianluca Guarini
* Contact: gianluca.guarini@gmail.com
* Website: http://www.gianlucaguarini.com/
* Twitter: @gianlucaguarini
* https://gianlucaguarini.github.io/vague.js/
*
* Copyright (c) 2013 Gianluca Guarini
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
**/

var $window = $(window),
    $main = $('.mainIframe');
    $blurred = $('.blurred');
var vague = $blurred.find('iframe').Vague({
  intensity:5 //blur intensity
});
vague.blur();

var scrollIframe = function () {
  $blurred.find('iframe').css({
    top: -$blurred.offset().top
  });
};
$window.on('scroll',scrollIframe);

scrollIframe();
!
999px

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