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docs: Optimize server interaction - insert updated link. (#49438)

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PR Close #49438
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Virginia Dooley 2023-03-16 02:04:18 +00:00 committed by Pawel Kozlowski
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aio/content/guide/http-optimize-server-interaction.md
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@ -37,6 +37,12 @@ Rather than forward every `searchText` value directly to the injected `PackageSe
The code sets `packages$` to this re-composed `Observable` of search results.
The template subscribes to `packages$` with the [AsyncPipe](api/common/AsyncPipe) and displays search results as they arrive.
<div class="alert is-helpful">
See [Using interceptors to request multiple values](guide/http-interceptor-use-cases#cache-refresh) for more about the `withRefresh` option.
</div>
## Using the `switchMap()` operator
The `switchMap()` operator takes a function argument that returns an `Observable`.