​
Using Google Fonts

To use Google Fonts in your documents, import them in your document’s <Head> component: 
import { Document, Head } from "@htmldocs/react"

function MyDocument() {
  return (
    <Document>
      <Head>
        <link
          href="https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap"
          rel="stylesheet"
        />
      </Head>
      <div style={{ fontFamily: 'Inter, sans-serif' }}>
        Text using Google Font (Inter)
      </div>
    </Document>
  )
}

​
Using Local Fonts

For local fonts, place your font files in the /documents/static directory and use @font-face to define them:
All font files must be placed in the /documents/static directory of your project. This is the required location for serving static assets in your document templates.
import { Document, Head } from "@htmldocs/react"

function MyDocument() {
  return (
    <Document>
      <Head>
        <style>
          {`
            @font-face {
              font-family: 'CustomFont';
              src: url('/static/fonts/CustomFont.woff2') format('woff2'),
                   url('/static/fonts/CustomFont.woff') format('woff');
              font-weight: normal;
              font-style: normal;
              font-display: swap;
            }
          `}
        </style>
      </Head>
      <div style={{ fontFamily: 'CustomFont' }}>
        Text using local custom font
      </div>
    </Document>
  )
}