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I have two fonts which I am trying to display to the user, while there's no FOIT, and instead I am having a FOUT I'd like user not to re-download fonts each time they revisit the page.
I have added Font observer to add additional FOUT fallback functionality. _document.js
componentWillMount() {
if (process.browser) {
const html = document.documentElement;
html.classList.add('fonts-loading');
const fontPoppins = new FontFaceObserver('Poppins');
fontPoppins.load(null, 5000).then(() => {
console.log('Poppins font has loaded.');
html.classList.remove('fonts-loading');
html.classList.add('fonts-loaded');
}).catch(() => {
html.classList.remove('fonts-loading');
html.classList.add('fonts-failed');
});
const fontAvenir = new FontFaceObserver('Avenir');
fontAvenir.load(null, 5000).then(() => {
console.log('Avenir font has loaded.');
}).catch(() => {
html.classList.remove('fonts-loading');
html.classList.add('fonts-failed');
});
}
}
... (more code here)
render ( code here ) ...
// Additional FOUT?
<Head>
<link
href="https://fonts.googleapis.com/css?family=Poppins:200,300,400,600,700,800,900&display=swap"
rel="preload"
as="font"
/>
... (more code here)
</Head>
styles.css
html {
font-family: sans-serif;
-webkit-font-smoothing: antialiased;
}
.fonts-loaded html {
font-family: Avenir, sans-serif;
}
@font-face {
font-family: Avenir;
src: url('/static/fonts/Avenir.ttc');
font-display: swap;
font-style: normal;
}
@font-face {
font-family: Poppins;
src: url('/static/fonts/Poppins-Regular.ttf');
font-weight: 400;
font-style: normal;
font-display: swap;
}
667
Use next.js custom server and you can set cache-control for each files.
https://github.com/zeit/next.js/#custom-server-and-routing
const parsedUrl = parse(req.url, true)
const { pathname, query } = parsedUrl
if(pathname === '/static/fonts/Avenir.ttc' || pathname === '/static/fonts/Poppins-Regular.ttf') {
res.setHeader('Cache-Control', 'public,max-age=31536000');
}
For Google Font its look like cache-control had set already.
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