Nim is another language with a JS backend and it is also kinda good at this: it has a pretty good type system, but it's easy to use it gradually for JS code.
You have a `JsObject` type (which is basically `any`) which lets you write your Nim->JS code in a dynamic way and cast to static types whenever you need to interface with static parts of your program. You can still also define the type signatures of a JS API as well and have a fully type safe experience, but you can do it lazily: just for the functions/types you need.
Basically you can use a JS api in any way you want: from almost fully dynamically to gradually more and more type safe way
You have a `JsObject` type (which is basically `any`) which lets you write your Nim->JS code in a dynamic way and cast to static types whenever you need to interface with static parts of your program. You can still also define the type signatures of a JS API as well and have a fully type safe experience, but you can do it lazily: just for the functions/types you need.
Basically you can use a JS api in any way you want: from almost fully dynamically to gradually more and more type safe way