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save-data.html
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save-data.html
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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>FOUT with Save-Data</title>
<style>
body {
font-family: Lato, sans-serif;
}
</style>
<script>
(function() {
function loadFonts() {
if( !("fonts" in document ) ) {
return;
}
var fontRoman = new FontFace("Lato", "url('font-lato/lato-regular-webfont.woff2') format('woff2'),url('font-lato/lato-regular-webfont.woff') format('woff')");
var fontBold = new FontFace("Lato", "url('font-lato/lato-bold-webfont.woff2') format('woff2'),url('font-lato/lato-bold-webfont.woff') format('woff')", {
weight: "700"
});
var fontItalic = new FontFace("Lato", "url('font-lato/lato-italic-webfont.woff2') format('woff2'),url('font-lato/lato-italic-webfont.woff') format('woff')", {
style: "italic"
});
var fontBoldItalic = new FontFace("Lato", "url('font-lato/lato-bolditalic-webfont.woff2') format('woff2'),url('font-lato/lato-bolditalic-webfont.woff') format('woff')", {
weight: "700",
style: "italic"
});
Promise.all([
fontRoman.load(),
fontBold.load(),
fontItalic.load(),
fontBoldItalic.load()
]).then(function(loadedFonts) {
// Render them at the same time
loadedFonts.forEach(function(font) {
document.fonts.add(font);
});
});
}
if( navigator.connection && navigator.connection.saveData ) {
} else {
loadFonts();
}
})();
</script>
</head>
<body>
<h1>FOUT with Save-Data</h1>
<p>This is a paragraph. <strong>This is heavier text.</strong> <em>This is emphasized text.</em> <strong><em>This is heavier and emphasized text.</em></strong></p>
<hr style="margin-top: 2em">
<ul>
<li>This demo is a companion to <a href="https://www.zachleat.com/web/comprehensive-webfonts/">A Comprehensive Guide to Font Loading Strategies</a></li>
<li>See all demos on <a href="https://github.com/zachleat/web-font-loading-recipes">GitHub <code>zachleat/web-font-loading-recipes</code></a></li>
</ul>
</body>
</html>