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Typography

Custom global typography inside src/theme/typography.

Create React App, Vite.js

Google fonts

<!doctype html>
<html lang="en">
  <head>
    <link rel="preconnect" href="https://fonts.googleapis.com" />
    <link rel="preconnect" href="https://fonts.gstatic.com" />
    <link href="https://fonts.googleapis.com/css2?family=Public+Sans:wght@400;500;600;700;800&display=swap"
      rel="stylesheet" />
    <link href="https://fonts.googleapis.com/css2?family=Barlow:wght@900&display=swap" rel="stylesheet" />
  </head>
</html>
index.html

const primaryFont = 'Public Sans, sans-serif';
const secondaryFont = 'Barlow, sans-serif';
 
const typography = {
  fontFamily: primaryFont,
  h1: {
    fontFamily: primaryFont,
  },
  h2: {
    fontFamily: secondaryFont,
},
};
src/theme/typography

Local fonts

<!doctype html>
<html lang="en">
  <head>
    <link rel="stylesheet" type="text/css" href="%PUBLIC_URL%/fonts/index.css" />
  </head>
</html>
index.html

Create public/fonts
public/fonts
  ├── index.css
  ├── CircularStd-Medium.otf
  ├── CircularStd-Bold.otf
  ├── Barlow-Medium.ttf
  ├── ...

@font-face {
  font-family: 'CircularStd';
  font-weight: 500;
  font-style: normal;
  src:
    local('CircularStd'),
    url('CircularStd-Medium.otf') format('opentype');
}
@font-face {
  font-family: 'CircularStd';
  font-weight: 700;
  font-style: normal;
  src:
    local('CircularStd'),
    url('CircularStd-Bold.otf') format('opentype');
}
@font-face {
  font-family: 'Barlow';
  font-weight: 500;
  font-style: normal;
  src:
    local('Barlow'),
    url('Barlow-Medium.ttf') format('truetype');
}
public/fonts/index.css

Usage

import { secondaryFont } from 'src/theme/typography';
 
const StyledTextH1 = styled('h1')(({ theme }) => ({
  fontSize: 16,
  fontFamily: theme.typography.fontFamily,
}));
 
const StyledTextH2 = styled('h1')({
  fontSize: 16,
  fontFamily: secondaryFont,
});
Next.js

Google fonts

https://nextjs.org/docs/app/building-your-application/optimizing/fonts#google-fonts

import { Public_Sans, Barlow } from 'next/font/google';
 
export const primaryFont = Public_Sans({
  weight: ['400', '500', '600', '700', '800'],
  subsets: ['latin'],
  display: 'swap',
  fallback: ['Helvetica', 'Arial', 'sans-serif'],
});
 
export const secondaryFont = Barlow({
  weight: ['900'],
  subsets: ['latin'],
  display: 'swap',
  fallback: ['Helvetica', 'Arial', 'sans-serif'],
});
src/theme/typography

Local fonts

https://nextjs.org/docs/app/building-your-application/optimizing/fonts#local-fonts

Create public/fonts
public/fonts
  ├── CircularStd-Bold.otf
  ├── CircularStd-Book.otf
  ├── CircularStd-Medium.otf

Update src/theme/typography
import localFont from 'next/font/local';
import { Barlow } from 'next/font/google';
 
export const primaryFont = localFont({
  src: [
    {
      path: '../../public/fonts/CircularStd-Book.otf',
      weight: '400',
      style: 'normal',
    },
    {
      path: '../../public/fonts/CircularStd-Medium.otf',
      weight: '500',
      style: 'normal',
    },
    {
      path: '../../public/fonts/CircularStd-Bold.otf',
      weight: '700',
      style: 'normal',
    },
  ],
});
 
export const secondaryFont = Barlow({
  weight: ['900'],
  subsets: ['latin'],
  display: 'swap',
  fallback: ['Helvetica', 'Arial', 'sans-serif'],
});

Usage

import { primaryFont } from 'src/theme/typography';
 
export default function RootLayout({ children }) {
  return (
    <html lang="en" className={primaryFont.className}>
      <body>
        {children}
      </body>
    </html>
  );
}

import { primaryFont, secondaryFont } from 'src/theme/typography';
 
const StyledTextH1 = styled('h1')({
  fontSize: 16,
  fontFamily: primaryFont.style.fontFamily,
});
 
const StyledTextH2 = styled('h2')({
  fontSize: 16,
  fontFamily: secondaryFont.style.fontFamily,
});
Reference: