globalsFetchEventprototypeFetchEvent.respondWith()Version: 3.27.2On this pageFetchEvent.respondWith()The respondWith() method allows you to provide a promise for a Response to send back to the client which made the incoming request to your application.SyntaxrespondWith(response)Parametersresponse: A Response or a Promise that resolves to a Response. Otherwise, a network error is returned to Fetch.Return valueAlways returns undefined.