Content IndexThe Content Index API allows developers to register their offline enabled content with the browser.limitedhttps://wicg.github.io/content-index/spec/https://developer.mozilla.org/docs/Web/API/ContentIndexapi.ContentIndexapi.ContentIndex.addapi.ContentIndex.deleteapi.ContentIndex.getAllapi.ContentIndexEventapi.ContentIndexEvent.ContentIndexEventapi.ContentIndexEvent.idapi.ServiceWorkerGlobalScope.contentdelete_eventapi.ServiceWorkerRegistration.indexhttps://nowyoucanuse.com/features--content-index.html