Update use-subscription README (#16216)

It was a little confusing that the question asked when NOT to use this package, then the answer says when to use it. I think this is a little better.
This commit is contained in:
Sophie Alpert
2019-07-25 19:30:55 -07:00
committed by Brian Vaughn
parent c0830a0e63
commit b43785e151
+3 -3
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@@ -2,11 +2,11 @@
React hook that safely manages subscriptions in concurrent mode.
This utility can be used for subscriptions to a single value that are typically only read in one place and may update frequently (e.g. a component that subscribes to a geolocation API to show a dot on a map).
## When should you NOT use this?
This utility should be used for subscriptions to a single value that are typically only read in one place and may update frequently (e.g. a component that subscribes to a geolocation API to show a dot on a map).
Other cases have **better long-term solutions**:
Most other cases have **better long-term solutions**:
* Redux/Flux stores should use the [context API](https://reactjs.org/docs/context.html) instead.
* I/O subscriptions (e.g. notifications) that update infrequently should use a mechanism like [`react-cache`](https://github.com/facebook/react/blob/master/packages/react-cache/README.md) instead.
* Complex libraries like Relay/Apollo should manage subscriptions manually with the same techniques which this library uses under the hood (as referenced [here](https://gist.github.com/bvaughn/d569177d70b50b58bff69c3c4a5353f3)) in a way that is most optimized for their library usage.