Having trouble using with ts-node/ts-node-dev

[barticus]

Hey!

Plugin looks great, resolves a few issues I have with the fastify-swagger plugin - Thanks!

In my local set up, I original had "module": "commonjs" but then after trying to use this plugin i get errors when i try to run locally with ts-node-dev.

Do you have a workaround with this, otherwise can you use a module format more amenable to running with node? For example, heres the fastify-resty TS Config

Links for issues related:
ts-node issue
stackoverflow post on issue

If you'd prefer a PR on this, let me know!

[ShogunPanda]

Hello!

There are several workaround, depending on how you run your code and depending on your tsconfig.json.

If using the import fastifyOpenapiDocs from 'fastify-openapi-docs' don't work out of the box, then you have to use the dynamic import statement, which returns a promise with your module:

const fastify = require('fastify')()

import('fastify-openapi-docs').then(fastifyOpenapiDocs => {
  fastify.register(fastifyOpenapiDocs, /* ... */)

  /* Continue your server bootstrap */
})

Now, due to a Typescript bug, even the import might be transpiled to a require and result in a ERR_REQUIRE_ESM error, so in that case you have to use a second workaround:

// Workaround for https://github.com/microsoft/TypeScript/issues/43329
const _importDynamic = new Function('modulePath', 'return import(modulePath)')

const fastify = require('fastify')()

_importDynamic('fastify-openapi-docs').then(fastifyOpenapiDocs => {
  fastify.register(fastifyOpenapiDocs, /* ... */)

  /* Continue your server bootstrap */
})

Let me know if this works, otherwise please provide me a minimal reproduction repository.
Hope this helps!