Promises kicked my butt until I came to the realization that a promise is a unit of work that must be fully 'encapsulated' in order to use with then(). The thing you pass in then() must be a function ...

JavaScript promises: 4 gotchas and how to ... This is an excellent illustration of the clarity await provides when ... .then will wrap its return value in a promise, which lets us call .then again.

Listing 6. Chaining promises with then ... JavaScript promises: 4 gotchas and how to avoid them. Jun 4, 2025 8 mins. feature. AI didn’t kill Stack Overflow. May 28, 2025 9 mins. feature.