sra.js

if (HTMLScriptElement.supports?.('speculationrules')) {
  const specScript = document.createElement('script');
  specScript.type = 'speculationrules';
  const specRules = {
    prerender: [
      {
        urls: ['/next.html'],
      },
    ],
  };
  specScript.textContent = JSON.stringify(specRules);
  document.body.append(specScript);
}