Function preloaderPre

packages/qwik/src/server/preload-impl.ts:24–90

(
  base: string,
  resolvedManifest: ResolvedManifest | undefined,
  options: PreloaderOptions | false | undefined,
  beforeContent: JSXNode<string>[],
  nonce?: string
)

};

export const preloaderPre = (
  base: string,
  resolvedManifest: ResolvedManifest | undefined,
  options: PreloaderOptions | false | undefined,
  beforeContent: JSXNode<string>[],
  nonce?: string
) => {
  const preloaderPath = simplifyPath(base, resolvedManifest?.manifest?.preloader);
  const bundleGraphPath =
    (import.meta.env.BASE_URL || '/') + resolvedManifest?.manifest.bundleGraphAsset;
  if (preloaderPath && bundleGraphPath && options !== false) {
    // Initialize the SSR preloader
    const preloaderOpts: Parameters<typeof initPreloader>[1] =
      typeof options === 'object'
        ? {
            debug: options.debug,
            preloadProbability: options.ssrPreloadProbability,
          }
        : undefined;
    initPreloader(resolvedManifest?.manifest.bundleGraph, preloaderOpts);

    // Add the preloader script to the head
    const opts: string[] = [];
    if (options?.debug) {
      opts.push('d:1');
    }
    if (options?.maxIdlePreloads) {
      opts.push(`P:${options.maxIdlePreloads}`);
    }
    if (options?.preloadProbability) {
      opts.push(`Q:${options.preloadProbability}`);
    }
    const optsStr = opts.length ? `,{${opts.join(',')}}` : '';

    const script =
      `let b=fetch("${bundleGraphPath}");` +
      `import("${preloaderPath}").then(({l})=>` +
      `l(${JSON.stringify(base)},b${optsStr})` +
      `);`;

    beforeContent.push(
      /**
       * We add modulepreloads even when the script is at the top because they already fire during
       * html download
       */
      jsx('link', { rel: 'modulepreload', href: preloaderPath, nonce, crossorigin: 'anonymous' }),
      jsx('link', {
        rel: 'preload',
        href: bundleGraphPath,
        as: 'fetch',
        crossorigin: 'anonymous',
        nonce,
      }),
      jsx('script', {
        type: 'module',
        async: true,
        dangerouslySetInnerHTML: script,
        nonce,