Improvement suggestion: useTimeout

[janwirth]

User story: I want to use useTimeout in order to nudge the user while they are looking at my page.

Problem: If the timeout elapses while the user is looking at another tab, they will miss the nudge.

It would be very nice if useTimeout had an option / variant that 'pauses' the timeout if the window is not focused.

This would require

1. keeping the started timestamp
2. clearing the timeout on window defocus and keep the elapsed time
3. when the window is focused, set a new timeout which is the original timeout minus the elapsed time
4. consider a scenario with multiple blur.

[stevebeauge]

Hello @janwirth

maybe this can help: https://codesandbox.io/s/wizardly-minsky-39c9nf?file=/src/App.tsx

@juliencrn I consider submitting a PR to integrate my work if you think it is worth it.