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HTML

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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.

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JavaScript

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Babel includes JSX processing.

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HTML 

              
                    <main>
      <h1>Some heading text that should be narrower and bolder</h1>
      <ol>
        <li><p>And some body copy text that should be lighter and wider.</p></li>
        <li><p class="roboto">Body copy text that should be in Roboto.</p></li>
        <li><p class="roboto slanted">And some body copy text that should be in Roboto and slanted.</p></li>
        <li><p>Body copy text that should let <strong>the strong tag</strong> still work (without having to specify a weight) - showing that normal browser defaults will still work correctly.</p></li>
        <h2>Code behaving badly</h2>
        <li><p class="roboto slanted-badly">Text set in Roboto and slanted using font-variation settings <span class="unslanted">with a bit of text in the middle set back to 0deg slant</span> with font-style.</p></li>
        <li><p class="roboto bolded-badly">Text set in Roboto and weight set using font-variation settings <strong>with a bit of text in the middle set using the strong tag</strong> with font-style.</p></li>
        <h2>Optical sizing</h2>
        <li><p class="amstelvar">Text set in Amstelvar with optical sizing set to auto.</p></li>
        <li><p class="amstelvar bigger">Text set in Amstelvar with optical sizing set to auto.</p></li>
        <li><p class="amstelvar bigger opsz-off">Text set in Amstelvar with optical sizing set to off.</p></li>
        <li><p class="recursive">Text set in Recursive </p></li>
        <h2>Separate Slant and Italic axes</h2>
        <p>If a font has both axes, you have to set them with font-variation-settings</p>
        <li><p class="recursive slanted">Text set in Recursive with slant</p></li>
        <li><p class="recursive italic">Text set in Recursive in italic, no slant</p></li>
        <li><p class="recursive slanted italic">Text set in Recursive with slant and italics</p></li>
      </ol>
    </main>
!

CSS 

              
                @font-face {
  font-family: 'Plex Sans VF';
  src: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSansVar-Roman.woff2') format('woff2 supports variations'), url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/IBMPlexSansVar-Roman.woff2') format('woff2-variations');
  font-stretch: 85% 100%;
  font-style: normal;
  font-weight: 100 700;
}
@font-face {
  font-family: 'Roboto VF';
  src: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/Roboto-VF.woff2') format('woff2 supports variations'), 
    url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/Roboto-VF.woff2') format('woff2-variations');
  font-stretch: 75% 100%;
  font-style: oblique 0deg 12deg;
  font-weight: 100 900;
}
@font-face {
  font-family: 'Amstelvar VF';
  src: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/AmstelvarAlpha-VF_v1.1.woff2') format('woff2 supports variations'), 
    url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/AmstelvarAlpha-VF_v1.1.woff2') format('woff2-variations');
}
@font-face {
  font-family: 'Recursive';
  src: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/Recursive.woff2') format('woff2 supports variations'), 
    url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/Recursive.woff2') format('woff2-variations');
  font-weight: 300 900;
}

body {
  font-family: 'Plex Sans VF', Helvetica, Arial, sans-serif;
  font-stretch: 100%;
  font-weight: 375;
}
main {
  margin: 0 auto 1rem auto;
  max-width: 42rem;
}
h1 {
  font-size: 3.5rem;
  font-stretch: 85%;
  font-weight: 625;
}
p {
  font-size: 1.25rem;
}
.roboto {
  font-family: 'Roboto VF', Helvetica, Arial, sans-serif;
  font-weight: 425;
  font-stretch: 95%;
}
.slanted {
  font-style: oblique 12deg;
  font-synthesis: none;
}
.slanted-badly {
  font-synthesis: none;
  font-variation-settings: 'slnt' 12;
}
.unslanted {
  color: blue;
  font-style: oblique 0deg;
}
.bolded-badly {
  font-synthesis: none;
  font-variation-settings: 'wght' 500;
}
.bolded-badly strong {
  color: blue;
}
.amstelvar {
  font-family: 'Amstelvar VF', Georgia, serif;
  font-size: 1em;
  font-weight: normal;
}
.amstelvar.bigger {
  font-size: 3em;
}
.amstelvar.opsz-off {
  font-optical-sizing: none;
}
.recursive {
  font-family: Recursive, Helvetica, Arial, sans-serif;
  font-weight: 400;
  font-style: oblique 0deg;
  --vf-slnt: 0;
  --vf-ital: 0;
  font-variation-settings: 'ital' var(--vf-ital), 'slnt' var(--vf-slnt);
  
}
.recursive.slanted {
  --vf-slnt: -8;
}
.recursive.italic {
  --vf-ital: 1;
}
!

JS
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