css/css-fonts/font-synthesis-weight-first-line.html

<!DOCTYPE html>
<html lang="en">
<meta charset="utf-8"/>
<title>CSS Test: font-synthesis-weight apply to ::first-line</title>
<link rel="match" href="font-synthesis-weight-first-line-ref.html">
<link rel="help" href="https://www.w3.org/TR/css-fonts-3/#font-synthesis-weight">
<meta name="assert" content="If ‘weight’ is not specified, user agents must not synthesize bold faces">
<style>
    @font-face {
        font-family: "Lato-Medium";
        src: url(support/fonts/Lato-Medium.ttf);
    }
    @supports not (font-synthesis-weight: none) {
        .test {color: red;}
    }
    .test {
        font-family: "Lato-Medium";
        font-size: 3em;
    }
    p.nosynth::first-line {
        font-weight: bold;
        font-synthesis-weight: none;
    }
</style>

<p>Test passes if the two lines below are identical (the first line is <em>not bold</em>), and there is no red.</p>
<section class="test">
    <p class="nosynth">Filler text<br>Filler text</p>
</section>