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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

In CodePen, whatever you write in the HTML editor is what goes within the <body> tags in a basic HTML5 template. So you don't have access to higher-up elements like the <html> tag. If you want to add classes there that can affect the whole document, this is the place to do it.

About the <head>

In CodePen, whatever you write in the HTML editor is what goes within the <body> tags in a basic HTML5 template. If you need things in the <head> of the document, put that code here.

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Insecure Resource

The resource you are linking to is using the 'http' protocol, which may not work when the browser is using https.

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

You can also link to another Pen here, and we'll pull the JavaScript from that Pen and include it. If it's using a matching preprocessor, we'll combine the code before preprocessing, so you can use the linked Pen as a true dependency.

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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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Using packages here is powered by Skypack, which makes packages from npm not only available on a CDN, but prepares them for native JavaScript ES6 import usage.

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HTML 

              
                <div class="grow pic">
  <img src="http://lorempixel.com/400/400/people/6" alt="portrait">
</div>

<!-- shrink this image -->
<div class="shrink pic">
  <img src="http://lorempixel.com/400/400/nightlife/4" alt="city">
</div>

<!-- make this picture come alive by panning the image on hover. Notice the picture size has been increased -->

<div class="sidepan pic">
  <img src="http://lorempixel.com/600/300/sports/7" alt="kick">
</div>

<!-- make this picture move to the top. Notice the a picture with a larger height has been taken -->
<div class="vertpan pic">
  <img src="http://lorempixel.com/300/600/sports/5" alt="climb">
</div>


<!-- tilt this image on hover -->
<div class="tilt pic">
  <img src="http://lorempixel.com/300/300/transport/3" alt="car">
</div>

<!-- morph this image -->

<div class="morph pic">
  <img src="http://lorempixel.com/300/300/technics/5" alt="headphones">
</div>

<!-- focus effect to this image -->
<div class="focus pic">
    <img src="http://lorempixel.com/300/300/sports/1" alt="cricket">
  </div>

<!-- blur effect -->
<div class="blur pic">
  <img src="http://lorempixel.com/300/300/transport/2" alt="plane">
</div>
<!-- black and white effect -->
<div class="bw pic">
  <img src="http://lorempixel.com/300/300/nature/3/" alt="nature" />
</div>

<!-- brighten the image -->
<div class="brighten pic"><img src="http://lorempixel.com/400/400/people/4/" alt="people" /></div>
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CSS 

              
                /* border box sizing to all boxes */

* {
  -webkit-box-sizing: border-box;
     -moz-box-sizing: border-box;
      -ms-box-sizing: border-box;
          box-sizing: border-box;
}

/* basic style */
body {
  background: #333;
}

.pic {
  border: 10px solid #fff;  
  float: left;
  height: 300px;
  width: 300px;
  margin: 20px;
  overflow: hidden;
   
  -webkit-box-shadow: 5px 5px 5px #111;
          box-shadow: 5px 5px 5px #111;  
}

/* end of basic style */

/*GROW*/
.grow img {
  height: 300px;
  width: 300px;
 
  -webkit-transition: all 1s ease;
     -moz-transition: all 1s ease;
       -o-transition: all 1s ease;
      -ms-transition: all 1s ease;
          transition: all 1s ease;
}
 
.grow img:hover {
  width: 400px;
  height: 400px;
}

/*SHRINK*/
.shrink img {
  height: 400px;
  width: 400px;
 
  -webkit-transition: all 1s ease;
     -moz-transition: all 1s ease;
       -o-transition: all 1s ease;
      -ms-transition: all 1s ease;
          transition: all 1s ease;
}

.shrink img:hover {
  width: 300px;
  height: 300px;
}

/*SIDEPAN - margin-left does the trick */
.sidepan img {
  margin-left: 0px;
  -webkit-transition: margin 1s ease;
     -moz-transition: margin 1s ease;
       -o-transition: margin 1s ease;
      -ms-transition: margin 1s ease;
          transition: margin 1s ease;
}
 
.sidepan img:hover {
  margin-left: -200px;
}

/*VERTPAN*/
.vertpan img {
  margin-top: 0px;
  -webkit-transition: margin 1s ease;
     -moz-transition: margin 1s ease;
       -o-transition: margin 1s ease;
      -ms-transition: margin 1s ease;
          transition: margin 1s ease;
}
 
.vertpan img:hover {
  margin-top: -200px;
}

/*TILT*/

.tilt {
  -webkit-transition: all 0.5s ease;
     -moz-transition: all 0.5s ease;
       -o-transition: all 0.5s ease;
      -ms-transition: all 0.5s ease;
          transition: all 0.5s ease;
}
.tilt:hover {
  -webkit-transform: rotate(-10deg);
     -moz-transform: rotate(-10deg);
       -o-transform: rotate(-10deg);
      -ms-transform: rotate(-10deg);
          transform: rotate(-10deg);
}

/*MORPH*/
.morph {
  -webkit-transition: all 1s ease;
     -moz-transition: all 1s ease;
       -o-transition: all 1s ease;
      -ms-transition: all 1s ease;
          transition: all 1s ease;
}
 
.morph:hover {
  border-radius: 50%;
  -webkit-transform: rotate(360deg);
     -moz-transform: rotate(360deg);
       -o-transform: rotate(360deg);
      -ms-transform: rotate(360deg);
          transform: rotate(360deg);
}

/*FOCUS*/
.focus {
  -webkit-transition: all 1s ease;
     -moz-transition: all 1s ease;
       -o-transition: all 1s ease;
      -ms-transition: all 1s ease;
          transition: all 1s ease;
}
 
.focus:hover {
  border: 70px solid #000;
  border-radius: 50%;
}

/* BLUR */
.blur {
  -moz-transition: all 1s ease;
  -ms-transition: all 1s ease;
  -o-transition: all 1s ease;
  transition: all 1s ease;
  -webkit-transition: all 1s ease;
}

.blur img:hover {
  -webkit-filter: blur(5px);
  filter: blur(5px);
}

/* grayscale filter */
.bw {
  -webkit-transition: all 1s ease;
  -moz-transition: all 1s ease;
  -ms-transition: all 1s ease;
  -o-transition: all 1s ease;
  transition: all 1s ease;
}

.bw img:hover {
  -webkit-filter: grayscale(100%);
  filter: grayscale(100%);
}

/* Brighten filter */
.brighten img {
  -webkit-transition: all 1s ease;
  -moz-transition: all 1s ease;
  -ms-transition: all 1s ease;
  -o-transition: all 1s ease;
  transition: all 1s ease;
}

.brighten img:hover {
  -webkit-filter: brightness(150%);
  filter: brightness(150%);
}
!

JS
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999px

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