Web Content Index API
[PWA](https://texonom.com/pwa-ce30bfc4fc164a59ac2ca0b01f23edf7) 


The Content Indexing API is not an alternative way of caching content
It's a way of providing metadata about pages that are already cached by your service worker
so it has dependency to service worker




> [Indexing your offline-capable pages with the Content Indexing API](https://web.dev/content-indexing-api/)





