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HTML

About HTML Preprocessors

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

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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).

Add External Stylesheets/Pens

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

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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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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.

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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.

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

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.

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About Packages

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

All packages are different, so refer to their docs for how they work.

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HTML 

              
                <!-- markup structure
article, wrapping container
    figure, wrapping the image
    div, wrapping container for a quote and  the name of the testimonial
-->
<article>
    <figure>
        <img alt="A rather marvellous macaw, opening one of its wings to support the cause." src="https://images.pexels.com/photos/2317904/pexels-photo-2317904.jpeg?auto=compress&cs=tinysrgb&dpr=2&h=650&w=940" />
    </figure>

    <div>
        <p>
            Lorem ipsum dolor sit amet consectetur adipisicing elit. Corrupti repellat, consequuntur doloribus voluptate esse iure?
        </p>
        <h1>
            Marvellous Macaw
        </h1>
    </div>
</article>
!

CSS 

              
                @import url("https://fonts.googleapis.com/css?family=Lato:700|Noticia+Text:400i&display=swap");

* {
  box-sizing: border-box;
  padding: 0;
  margin: 0;
}
body {
  /* center the article in the viewport */
  display: flex;
  min-height: 100vh;
  justify-content: center;
  align-items: center;
  /* include an off-white background */
  background: hsl(250, 85%, 97%);
  /* add perspective for the rotation of the article, added through the script */
  perspective: 500px;
}

article {
  /* limit the width of the article container */
  width: 350px;
  /* display the contents in a column */
  display: flex;
  flex-direction: column;
  align-items: center;
  background: hsl(0, 0%, 100%);
  line-height: 2;
  border-radius: 10px;
  margin: 0.5rem;
  /* transition for the transform property, updated in the script */
  transition: transform 0.2s ease-out;
  box-shadow: 0 0 5px -2px hsla(0, 0%, 0%, 0.1);
}
article figure {
  /* limit the width and height of the figure to show the image in a circle */
  width: 120px;
  height: 120px;
  border-radius: 50%;
  /* specify negative margin matching half the height of the element */
  margin-top: -60px;
  /* position relative for the pseudo element */
  position: relative;
  
}
article figure:before {
  /* add a border around the figure matching the color of the background, faking the clip */
  content: "";
  border-radius: inherit;
  position: absolute;
  top: 50%;
  left: 50%;
  width: 100%;
  height: 100%;
  transform: translate(-50%, -50%);
  border: 1rem solid hsl(250, 85%, 97%);
  box-shadow: 0 1px hsla(0, 0%, 0%, 0.1);
}
article figure img {
  /* stretch the image to cover the size of the wrapping container */
  border-radius: inherit;
  width: 100%;
  height: 100%;
  /* object fit to maintain the aspect ratio and fit the width/height */
  object-fit: cover;
}

article div {
  /* center the text in the div container */
  text-align: center;
  margin: 2rem;
}
article div p {
  color: hsl(250, 5%, 45%);
  font-weight: 400;
  font-style: italic;
  margin: 1rem 0 3rem;
  font-family: "Noticia Text", serif;
  /* position relative for the pseudo element */
  position: relative;
  z-index: 5;
}
article div p:before {
  /* with SVG elements include two icons for the quote */
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 100%;
  height: 100%;
  transform: translate(-50%, -50%);
  z-index: -5;
  opacity: 0.05;
  /* position the icons at either end of the paragraph, rotate the second to have a mirrorer image */
  background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 70 70" width="70" height="70"><rect x="0" y="40" width="30" height="30"></rect><path d="M 0 40 q 0 -40 30 -40 v 15 q -15 0 -15 25"></path><rect x="40" y="40" width="30" height="30"></rect><path d="M 40 40 q 0 -40 30 -40 v 15 q -15 0 -15 25"></path></svg>'),
    url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 70 70" width="70" height="70" transform="rotate(180)"><rect x="0" y="40" width="30" height="30"></rect><path d="M 0 40 q 0 -40 30 -40 v 15 q -15 0 -15 25"></path><rect x="40" y="40" width="30" height="30"></rect><path d="M 40 40 q 0 -40 30 -40 v 15 q -15 0 -15 25"></path></svg>');
  background-position: 20% 20%, 80% 80%;
  background-repeat: no-repeat;
}
article div h1 {
  /* considerably reduce the size of the heading */
  color: hsl(260, 5%, 55%);
  font-family: "Lato", sans-serif;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05rem;
}
!

JS 

              
                const article = document.querySelector('article');

// to compute the center of the card retrieve its coordinates and dimensions
const {
  x, y, width, height,
} = article.getBoundingClientRect();
const cx = x + width / 2;
const cy = y + height / 2;

// following the mousemove event compute the distance betwen the cursor and the center of the card
function handleMove(e) {
  const { pageX, pageY } = e;

  // ! consider the relative distance in the [-1, 1] range
  const dx = (cx - pageX) / (width / 2);
  const dy = (cy - pageY) / (height / 2);

  // rotate the card around the x axis, according to the vertical distance, and around the y acis, according to the horizontal gap 
  this.style.transform = `rotateX(${10 * dy * -1}deg) rotateY(${10 * dx}deg)`;
}

// following the mouseout event reset the transform property
function handleOut() {
  this.style.transform = 'initial';
}

article.addEventListener('mousemove', handleMove);
article.addEventListener('mouseout', handleOut);
!
999px

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