Function normalizePrefetches

packages/next/src/utils.ts:4725–4738

(prefetches: Record<string, FileFsRef>)

// to avoid any conflict with route matching/resolving, we prefix all prefetches (ie, __index.prefetch.rsc)
// this is to ensure that prefetches are never matched for things like a greedy match on `index.{ext}`
export function normalizePrefetches(prefetches: Record<string, FileFsRef>) {
  const updatedPrefetches: Record<string, FileFsRef> = {};

  for (const key in prefetches) {
    if (key === 'index.prefetch.rsc') {
      const newKey = key.replace(/([^/]+\.prefetch\.rsc)$/, '__$1');
      updatedPrefetches[newKey] = prefetches[key];
    } else {
      updatedPrefetches[key] = prefetches[key];
    }
  }

  return updatedPrefetches;
}

/**
 * Get the postponed state for a route.