Types vs Interfaces

[tsiq-swyx]

Spectrum discussion here brought up the Types vs Interfaces discussion. as far as I can tell there is no real difference between them. I personally always use interfaces but i dont have a strong reason apart from I can extend them if i need to. Should we recommend one or the other? anyone have a source?

[jamonholmgren]

I would always use interface for public API definitions. I usually use interface for internal types, but it’s less critical. In most cases they are functionally similar.

If you want one simple heuristic, just use interfaces everywhere. (Types can look and feel better in the case of unions though!)

Good resource here: https://medium.com/@martin_hotell/interface-vs-type-alias-in-typescript-2-7-2a8f1777af4c

[tsiq-swyx]

ah yes i forgot to mention i already merged in a bit about that here: https://github.com/sw-yx/react-typescript-cheatsheet#types-or-interfaces

that article is doing very well in SEO, it's come up 3 separate times :)