- Promises/A+ Specification - the source of truth as per Promise behavior
- We have a problem with promises - mistakes, which even experienced developers make with Promises. Check yourself!
- Обещание бургерной вечеринки (Russian translation) - введение в промисы от Марико Косака с отличными иллюстрациями
- Async functions - making promises friendly - Introduction to async functions by Jake Archibald
- Promise API Workshop - DIY Promise static methods - Workshop held by Yevhen Orlov during Kottans Frontend Course 2018-19. Write your own implementations of Promise static methods to get deeper understanding of them.
If you prefer video format, take a look at these videos by Mattias Petter Johansson aka MPJ on FunFunFunction channel: