---
title: Publishers.PrefetchStrategy.byRequest
framework: combine
role: symbol
role_heading: Case
path: combine/publishers/prefetchstrategy/byrequest
---

# Publishers.PrefetchStrategy.byRequest

A strategy that avoids prefetching and instead performs requests on demand.

## Declaration

```swift
case byRequest
```

## Discussion

Discussion This strategy just forwards the downstream’s requests to the upstream publisher.

## See Also

### Prefetching strategies

- [Publishers.PrefetchStrategy.keepFull](combine/publishers/prefetchstrategy/keepfull.md)