javascript

Vitest fake timers not advancing

vitest.*timer.*not advancing|vi\.advanceTimersByTime.*no effect

Fixes

1.Call vi.useFakeTimers() before test
2.Use vi.runAllTimers() for pending timers
3.Check Promise resolution with vi.advanceTimersByTimeAsync

vitesttimersasync

Related Errors

javascript3 fixes

Cannot read property of undefined

Cannot read propert(y|ies) of undefined

•Add optional chaining (?.)
•Check if object exists before accessing

javascript3 fixes

Cannot read property of null

Cannot read propert(y|ies) of null

•Add null check before access
•Use optional chaining (?.)

javascript3 fixes

TypeError: X is not a function

is not a function

•Check spelling of method name
•Verify import is correct