Relay Modern — Optimistic Update
Relay Modern provides an update way that solves the delay to update client data from server response.
It consists in update the client data with an anticipated value that reflects server response.
I'll describe in this post one way to update client data using optimisticResponse.
What happens if something goes wrong?
In case server side returns an error, the client data will get a rollback.
What happens if server response was different from updated data?
If the server response was different from updated data, Relay will apply server data ensuring consistency.
Without Optimistic
With Optimistic
optimisticResponse is an object that reflect your mutation output and needs to be passed to commitMutation.
Let's see a complete example:
In the code above, I'm updating the message status before it returns from server side.
I've made a repository to benchmark updating data with and without optimistic update.
The code and instructions can be found here.
