useSWRConfig mutate function causes to request data from the api twice

[yyuurreecc5]

Bug report

Description / Observed Behavior

When I'm calling mutate function from useSWRConfig hook the api request is called twice.

Expected Behavior

I expect it will be called only once after mutate function is called

Repro Steps / Code Example

CodeSandbox

When show === true (component mounted). The api request is executed twice on one click of the revalidate button (why?). And isValidating flag changes on true only when second api request is starting. It behavior is repeated on every click.

When show === false (component unmounted). After click on the revalidate button apiRequest is executed despite the fact that there is not a single mounted component using swr on page. Is this behavior correct?

Additional Context

SWR version: 2.1.0

[koba04]

In this case, you don't have to pass apiRequest to mutate. mutate(REQUEST_KEY) works fine in your case.
https://swr.vercel.app/docs/mutation#revalidation

[yyuurreecc5]

But, then we return to the previous issue:

#2416

[koba04]

That's an expected behavior.

The two requests are

1. the data function in mutate
2. revalidation by useSWR

If you don't want to make revalidation by useSWR, you can pass revadalite: false as an mutate's option.

mutate(REQUEST_KEY, apiRequest, { revalidate: false });

[yyuurreecc5]

Yeah, it's fixing double request issue, but:

1. I can't use isValidating flag and as a result I can't to show in the interface that data is updating.

2. When show === false (component unmounted). After click on the revalidate button apiRequest is executed despite the fact that there is not a single mounted component using swr on page.

Codesandbox