I'm a little surprised you need to test for

null

in that code - the callback should only run when the

networkConfiguration

is available. Were you seeing otherwise?

Compilation fails with

TS2532: Object is possibly 'undefined'.

if I remove the

null

check.

Ahh - I see - it's possible for this

networkConfiguration

to be missing from a valid ECS Service, so it can indeed be

undefined

. Nice that

strictNullChecks

catches this. You should be able to add back that check in a variant like what I shared as well if that looks simpler to you.

Indeed it does. Thanks 🙂