Function includePreloader

packages/qwik/src/server/preload-impl.ts:92–204

(
  base: string,
  resolvedManifest: ResolvedManifest | undefined,
  options: PreloaderOptions | boolean | undefined,
  referencedBundles: string[],
  nonce?: string
)

};

export const includePreloader = (
  base: string,
  resolvedManifest: ResolvedManifest | undefined,
  options: PreloaderOptions | boolean | undefined,
  referencedBundles: string[],
  nonce?: string
): JSXNode | null => {
  if (referencedBundles.length === 0 || options === false) {
    return null;
  }
  const { ssrPreloads, ssrPreloadProbability } = normalizePreLoaderOptions(
    typeof options === 'boolean' ? undefined : options
  );
  let allowed = ssrPreloads;

  const nodes: JSXNode[] = [];

  if (import.meta.env.DEV) {
    // Vite dev server active
    // in dev, all bundles are absolute paths from the base url, not /build
    base = import.meta.env.BASE_URL;
    if (base.endsWith('/')) {
      base = base.slice(0, -1);
    }
  }

  const links = [];

  const manifestHash = resolvedManifest?.manifest.manifestHash;
  if (allowed) {
    const preloaderBundle = resolvedManifest?.manifest.preloader;
    const coreBundle = resolvedManifest?.manifest.core;
    const expandedBundles = expandBundles(referencedBundles, resolvedManifest);
    // Keep the same as in getQueue (but *10)
    let probability = 4;
    const tenXMinProbability = ssrPreloadProbability * 10;
    for (const hrefOrProbability of expandedBundles) {
      if (typeof hrefOrProbability === 'string') {
        if (probability < tenXMinProbability) {
          break;
        }
        // we already preload the preloader and core bundles
        if (hrefOrProbability === preloaderBundle || hrefOrProbability === coreBundle) {
          continue;
        }
        links.push(hrefOrProbability);
        if (--allowed === 0) {
          break;
        }
      } else {
        probability = hrefOrProbability;
      }
    }
  }

  const preloaderPath = simplifyPath(base, manifestHash && resolvedManifest?.manifest.preloader);
  const insertLinks = links.length
    ? /**