How does refreshInterval work under the hood?

[casper-fernandes]

I have a use case where I need to call an API every minute, even if the page is out of focus.

Global swr config:
dedupingInterval: 10000

Local function swr config:
refreshInterval: 60000
revalidateOnFocus: false

With the above config, swr wokrs fine as long as Im on the page. But when I switch tabs and am out of focus for longer than the refreshInterval, and come back, it takes some time for my revalidation to occur