runtypes VS ttypescript

In terms of which runtime checker I should use. The first tutorial I saw suggested 'Zod', doing a bit more searchign yielded other options such as 'runtypes'.

Runtypes would probably be a better example.

this has been solved by several packages, runtypes https://github.com/pelotom/runtypes being my favorite

I personally like https://github.com/pelotom/runtypes because it bundles your Schema Info and the corresponding Typescript types

When I have to deal with data from API calls, I usually use a runtime typing library like Runtypes or Zod to check the responses at the boundary. These libraries can automatically give you TS types (using their static or infer utilities) to use throughout the rest of the project.

Also runtypes and (as mentioned below) zod.

Seconding the recommendation to use a library for this. runtypes and io-ts are two other alternatives.

I wouldn't reinvent the wheel: https://github.com/pelotom/runtypes

What does your library provide that others don't? For example: https://github.com/colinhacks/zodhttps://github.com/hapijs/joihttps://github.com/jquense/yuphttps://github.com/gcanti/io-tshttps://github.com/pelotom/runtypeshttps://github.com/sindresorhus/ow

Actually this can easily overcome by using https://github.com/cevek/ttypescript that allows using transformers in tsc and define then in tsconfig.json

You could write custom transformer for this (using ttypescript), if you really want to

didn't look to hard at it but afaik ttypescript is what you need https://github.com/cevek/ttypescript

That's it! after this, just register it with the method described on ttypescript.

As I noted above, this is a TypeScript transformer plugin so it needs to hook this plugin on TypeScript compilation phase. I suppose one of the easiest ways is using ttypescript which is a custom TypeScript compiler that can hook the transformer plugin on a compilation. Please refer also to the "How to use this transformer" section in README.

If you don't want to use a bundler, you can use https://github.com/cevek/ttypescript in combination with https://github.com/LeDDGroup/typescript-transform-paths

You can use the plugin https://github.com/awerlogus/io-ts-transformer with https://github.com/cevek/ttypescript to get compile time generation of io-ts codecs as well.

There is also a forked version of the compiler that allows custom transformers: https://github.com/cevek/ttypescript

Closest I can think of is ttypescript