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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

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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).

Add External Stylesheets/Pens

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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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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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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.

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HTML 

              
                <svg viewBox="0 0 500 500">
  <path d="M10,100 C15,5 250,5 250,100" id="theMotionPath" fill="none"/>
</svg>

<h1><a href="https://drafts.fxtf.org/motion-1/" target="_blank">Offset Path (CSS Motion Path)</a> Support</h1>

<h2>Properties supported in this browser</h2>
<aside>
  <div class="offsetpath">offset-path</div>
<div class="rotation">offset-rotate</div>
<div class="distance">offset-distance</div>
<div class="anchor">offset-anchor</div>
<div class="position">offset-position</div>
</aside>
<h2><code>offset-path</code> values supported</h2>
<main>
  <ul>
    <li><div class="path">path()</div></li>
    <li><div class="angle">angle</div></li>
    <li><div class="contain">contain</div></li>
    <li><div class="geometry-box">geometry-box</div></li>
    <li><div class="circle">circle()</div></li>
    <li><div class="ellipse">ellipse()</div></li>
    <li><div class="polygon">polygon()</div></li>
    <li><div class="rect">rect()</div></li>
    <li><div class="xywh">xywh()</div></li>
    <li><div class="url">url()</div></li>
  </ul>
</main>

<p>Legend</p>
<ul>
  <li class="latest">Current Spec <i>&#10004;</i></li>
  <li class="unsupported">Unsupported</li>
</ul>
!

CSS 

              
                div, main li {
  text-align:center;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}
div {
  color: white;
  background: #494857;
  width: 7rem;
  height: 2.6rem;
  border-radius: 1.25rem;
  border: .4rem solid #a94857;
  animation: animatePathOffset 2s 0s infinite alternate ease-in-out;
}
main li {
  margin: 1rem 1rem 4rem;
}
aside div {
  margin: 1rem 1rem 1rem;
}
@mixin newspec {
  background: #48a987;
  border-color: transparent;
  &::after {
    content: '✔';
    padding-left: .5rem;
  }
}

@supports (offset-path: path("M50,30 C35,25 55,25 55,30")) {
  .path {
    offset-path: path("M50,30 C35,25 55,25 55,30");
    @include newspec;
  }
}

@supports (offset-path: ray(85deg farthest-side)) {
  .angle {
    offset-path: ray(90deg farthest-side);
    @include newspec;
  }
}

@supports (offset-path: ray(45deg farthest-side contain)) {
  .contain {
    offset-path: ray(90deg farthest-side  contain);
    @include newspec;
  }
}

@supports (offset-path: margin-box) {
  .geometry-box {
    offset-path: margin-box;
    @include newspec;
  }
}

@supports (offset-path: circle(10px)) {
  .circle {
    offset-path: circle(10px);
    @include newspec;
  }
}
@supports (offset-path: ellipse(10px 20px)) {
  .ellipse {
    offset-path: ellipse(10px 20px);
    @include newspec;
  }
}
@supports (offset-path: polygon(50px 0px, 0px 100px, 100px 100px)) {
  .polygon {
    offset-path: polygon(50px 0px, 0px 100px, 100px 100px);
    @include newspec;
  }
}
@supports (offset-path: rect(10px 20px 30px 40px)) {
  .rect {
    offset-path: rect(10px 20px 30px 40px);
    @include newspec;
  }
}
@supports (offset-path: xywh(0px 0px 20px 20px)) {
  .xywh {
    offset-path: xywh(0px 0px 20px 20px);
    @include newspec;
  }
}

@supports (offset-path: url("#theMotionPath")) {
  .url {
    offset-path: url("#theMotionPath");
    @include newspec;
  }
}




@supports (offset-distance: 100%) {
  .distance {
    @include newspec;
  }
}
@supports (offset-rotate: 100deg) {
  .rotation {
    @include newspec;
  }
}
@supports (offset-path: path("M10,100 C15,5 250,5 250,100")) {
  .offsetpath {
    @include newspec;
  }
}
@supports (offset-anchor: top left) {
  .anchor {
    @include newspec;
  }
}
@supports (offset-position: top left) {
  .position {
    @include newspec;
  }
}

@keyframes animatePathOffset {
  0% { offset-distance: 45% }
  100% { offset-distance: 65% }
}
@keyframes animatePathAngle {
  0% { offset-distance: 45% }
  100% { offset-distance: 65% }
}



body {
  min-height: 100vh;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: center;
  font-family: sans-serif;
  background: #d9e9f9;
  background: radial-gradient(circle, #fefeff, #d9e9f9);
  padding-bottom: 10rem;
}
body > * {
  margin: 1.5rem 0 0rem;
}
main ul, aside {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  font-size: .75em;
}
svg {
  position: absolute;
  left: -100%;
  width: 1em;
}
body > ul {
  display: flex;
  margin: 0rem 0 3rem;
}
h1 + p {
  margin-bottom: 0rem;
}
body > ul li {
  font-size: .75em;
  background: #48a987;
  padding: .5rem;
  color: white;
  margin: .5rem;
  border-radius: .5rem;
  border: .2rem solid transparent;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}
li i {
  display: block;
}
li.unsupported {
  background: #474857;
  border-color: #a94857;
}


* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
h1 {
  font-size: 1.6em;
  font-weight: 500;
}
h2 {
  font-size: 1.2em;
  font-weight: 500;
}
!

JS
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999px

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