There and back again Understanding Async Await
summary
Walks through callbacks → Promises → async/await with concrete code: shows callback-as-function, Promise constructor as a reversed-parameter callback, and that async is just sugar over Promises and that await wraps values with Promise.resolve. Demonstrates Promise.all for concurrency and the exact pattern to parallelize multiple awaits, highlights the common bug where awaiting then calling .filter causes an order‑of‑operations error, and contrasts try/catch with .catch for error handling in Node/React flows.
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chapters (10)
- 0:00Intro
- 1:05What does it call back
- 2:35What is a callback
- 6:30What is a promise
- 11:55Async Await
- 16:15Async vs Promise
- 22:12Paralysis
- 25:13Promise Constructor
- 31:57Oneline Functions
- 33:50Order of Operations
