Asynchronous JS without the cringe
summary
The talk explains how to use JavaScript promises and async/await correctly, fixing common mistakes like mixing .then() chains with async/await, unnecessary return await, async functions without await, and incorrect use of map() with async. It shows proper mental models and techniques (including for-await-of and ways to achieve parallelization) to write concise, clean, and performant asynchronous JS code.
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chapters (15)
- 0:00Introduction
- 1:54Promise problems
- 3:00Promises vs callbacks
- 6:27Common anti-patterns
- 10:42Useless promise returns
- 14:54Sequences vs parallelism
- 18:28Async loops
- 21:38Style mix traps
- 24:45Manual promise chains
- 28:43Scope issues and fixes
- 31:55Async/await benefits
- 36:37Explicit vs implicit
- 39:04Summary and best practices
- 41:07Box 2 years demo
- 42:09Q&A
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