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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

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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).

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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.

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

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HTML 

              
                <div class="container">
  <header>
    <h1>Ideas for link styling</h1>
    <p>tiny boilerplates</p>
  </header>
  <div class="inner">
    <h3>:link</h3>
    <p class="link">Lorem ipsum dolor sit amet, consectetur adipisicing elit. <a href="alink.com">Eveniet aperiam expedita</a> explicabo quos omnis cupiditate dolorum quaerat aut modi possimus suscipit atque magni ex nihil voluptatibus quae totam accusamus animi!</p>
    <h3>:visited</h3>
    <p class="visited">Lorem ipsum dolor sit amet, consectetur adipisicing elit. <a href="alink.com">Nisi facilis repudiandae officiis</a> corporis reiciendis eaque nesciunt fugit similique facere voluptatem ad culpa autem obcaecati soluta quidem molestiae expedita enim odit.</p>
    <h3>:hover &amp; :focus</h3>
    <p class="hover">Lorem ipsum dolor sit amet, consectetur adipisicing elit. <a href="alink.com">Sequi sint totam</a> rerum quis deleniti eum sit optio esse eos tempora ratione delectus odit ad voluptatibus quos illum tenetur alias saepe?</p>
    <h3>:active</h3>
    <p class="active">Lorem ipsum dolor sit amet, consectetur adipisicing elit. <a href="alink.com">Quasi ad quam doloremque</a> enim consectetur dignissimos error debitis atque soluta perferendis odit saepe quod similique commodi magni aspernatur eligendi omnis! Dolores.</p>
  </div>
</div>
!

CSS 

              
                $main-color: #D25400;
$comp-color: #6389C5;
$third-color: desaturate(#C90018, 35%);
$light-color: #F5FFFA;
*,
*:before,
*:after {
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;  
}
h1,h2,h3,h4,h5,h6,p,a {
  margin-top: 0;  
}

html {
  border-left: 7px solid #D25400;
}
.container {
  background-color: #333333;
  background-image: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/26/bg1.png);  
  border-left: 1px solid #391700;
  float: left;
  width: 100%;
}
p {
  color: $light-color;
  font-family: georgia, "Times New Roman", serif;
  font-size: 16px;
  font-size: 1rem;
  line-height: 1.5;
  margin-bottom: 24px;
  margin-bottom: 1.5rem;
}

h3 {
  border-bottom: 1px solid;
  color: $comp-color;
  font-size: 24px;
  font-size: 1.5rem;
  line-height: 1;
  margin-bottom: 24px;
  margin-bottom: 1.5rem;  
}

.link a {
  color: $comp-color;
}
.visited a {
  color: lighten($third-color,35%);
  text-decoration: none;
  &:hover {
    text-decoration: underline;  
  }
}
.hover a {
  color: $third-color;
}
.active a {
  color: $third-color;
  text-decoration: none;
}
a {
  transition: .2s linear color;
  &:hover {
    color: $third-color;  
  }
}



h1 {
  color: $main-color;
  font-size: 36px;
  font-size: 2.25rem;
  line-height: 1.33333;
  margin-bottom: 0;
}
header {
  background-color: #3d2d30;
  background-image: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/26/html-bg.png);
  padding: 1% 0;
  text-align: center;
}

.inner {
  background-color: rgba(black, 0.1);
  border-radius: 2px;
//  box-shadow: 0 1px 5px rgba(black, 0.2);
  border: 1px solid rgba(black, 0.04);
  margin: 16px auto 0 auto;
  margin: 1rem auto;
  padding: 1% 2%;
  max-width: 45em;
}
!

JS
!
999px

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