font-synthesis-position-001-ref.html

<!DOCTYPE html>
<html lang="en">
<meta charset="utf-8"/>
<title>CSS reference</title>
<style>
    /* Lato has superscript Latin letters, but not subscript ones;
     * digits are available in both super- and subscript form.
     */
    @font-face {
        font-family: "lato";
        src: url(support/fonts/Lato-Medium.ttf);
    }
    .test {
        font-family: "lato";
        font-size: 2em;
    }
    .sub {
        font-feature-settings: 'subs' 1;
    }
    .super {
        font-feature-settings: 'sups' 1;
    }
</style>

<section class="test">
    <p>Synthetic super- and subscripts <em>must not</em> be used:</p>
    <p>Text with sub and <span class="sub">123</span> and <span class="sub">3.14</span></p>
    <!-- note that Lato does not support a superscript FULL STOP -->
    <p>Text with <span class="super">super</span> and <span class="super">123</span> and <span class="super">3</span>.<span class="super">14</span></p>
</section>

chromium/third_party/blink/web_tests/external/wpt/css/css-fonts/font-synthesis-position-001-ref.html