onDiscarded is never called

[alexjidras]

Bug report

Description / Observed Behavior

swr doesn't call onDiscarded callback. Request is deduplicated but onDiscarded is never called.

Expected Behavior

swr should call onDiscarded callback.

Repro Steps / Code Example

CodeSandbox

Additional Context

SWR version - 2.2.4^
React version - 16 and 18 tested and both fail

[samuel871211]

@alexjidras

Based on the official document

onDiscarded(key): callback function when a request is ignored due to race conditions

In your case, there are no race conditions, I believe that is why onDiscarded is never called.