Elegant Async Code with ES2015 Promises

Promises are by no means new to JavaScript, but their standardisation as part of ES2015 has changed them from a handy library feature to a core tool with which we can write elegant code for async functionality.

Transcript

1. ES2015 PROMISES ELEGANT ASYNC CODE WITH David Goss
2. Promises were around prior to ES2015 https://promisesaplus.com/ • RSVP • Q • jQuery • Dojo
3. Now developers and implementers can use them
4. Callbacks vs Promises
5. Callbacks violate the single responsibility principle and Callbacks kind of ruin the function signature but Promises only work for one-time success/failure use cases
6. Callbacks vs Promises
7. Implementing with Promises
8. The elegance comes from chaining
9. A practical (but totally fake) example https://github.com/davidjgoss/elegant-async-code
16. Without catch(), errors will be silently swallowed
17. The future with async functions and await?
18. (Your mileage may vary.)
19. Thank you. davidgoss.co twitter.com/davidjgoss github.com/davidjgoss