If a service worker is being used (and Cache API is available), the resource will be fetched and added to the cache. Otherwise, it will attempt to prefetch with a resource hint instead. It also does not run when offline. Note: This only enables event listeners! To add to the cache, see or. Read More »


Both the Google Custom Search Engine ID and Google Browser API Key are required in Nebula Options. This search will only search the current site, but the results are external (from Google's indexes) rather than internal (WordPress DB). Read More »


On a single search result, the user is redirected automatically to that result and then presented a header drawer element with an explanation and a search field. Read More »