layout.js / page.js export const metadata = {
  themeColor: [
    { media: '(prefers-color-scheme: light)', color: 'cyan' },
    { media: '(prefers-color-scheme: dark)', color: 'black' },
  ],
}
<head> output <meta name="theme-color" media="(prefers-color-scheme: light)" content="cyan" />
<meta name="theme-color" media="(prefers-color-scheme: dark)" content="black" />
manifest
A web application manifest, as defined in the Web Application Manifest specification.
layout.js / page.js export const metadata = {
  manifest: 'https://nextjs.org/manifest.json',
}
<head> output <link rel="manifest" href="https://nextjs.org/manifest.json" />
twitter
Learn more about the Twitter Card markup reference.
layout.js / page.js export const metadata = {