Callback Function ↔ function to call later (ie pass into Higher-Order Function)

aka Callback, Callback-Fn, Callback-Functions, Call-After-Function

References

1. Callback Queue ↔ Data structure "todo" list of Callback Function to await execution

2. **Event Loop** ↔ (mechanism) to orchestrate Non-Blocking Concurrency Model by manageCallback Functions between Callback Queue& Call Stack, to await execute

3. .catch() ↔ Chain Callback to handle Promise Error propagation

4. .finally() ↔ Chain Callback to call at end, regardless of Fullfill or Reject

5. Target Phase ↔ Event handle at target; executes Callback Functions attach to Event Listener

6. Concurrency Model ↔ (mechanism) to achieve Concurrency for JS Engine via Event Loop, Callback Queue & Callback Function

7. Callback Hell ↔ Deep nested Callback 🍜👨‍💻

8. assert.throws() ↔ assert Static Method to complain if Callback Function Parameter does not throw Exception

9. HANDLER ↔ Callback Function to execute when PATH matches

10. Event-Driven ↔ (model) to listen/respond async events via Callback Function

11. Handler ↔ Callback to run in response to Event Trigger

12. Currier Function ↔ function to pass/return another Callback Fn

13. useCallback() ↔ Memoizing Hook to Memoize Callback for given Deps Array

14. onAuthStateChanged() ↔ to trigger Callback on auth state changed (on Firebase Backend)

15. .then() ↔ async Chain Method to execute Callback on Fullfill, auto-pass Promise Value as arg

16. Event Handler ↔ Callback to run in response to Event Signal

17. Function Type ↔ Type to annotate Methods & Callback Function with implicit return of any

18. Higher-Order Function ↔ fn to receive Callback arg, to return fn, or both

19. Effect ↔ Callback to run inside function, under certain conditions

20. Inversion of Control ↔ Design Pattern to invert Control Flow to Callback to increase Modularity & decouple Deps ??

21. Microtask ↔ Callback to defer fn after parent EC popped off Call Stack

22. Task ↔ Callback in Task Queue to execute sequentially at Tick start until empty. Can enqueue more ♾ & execute in same Tick!