Add isLoading
state and refactor the core
#1928
Merged
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This PR removes the
isFallback
state added in #1925, with a newisLoading
state which covers more common use cases. Basically it's considered as "loading" when there is no loaded data* for the current key yet, while we are loading new data.*loaded data = data returned by the fetcher, not fallback or laggy data.
Here is a diagram showing the difference between
isLoading
andisValidating
: