Trying to add some generic functions globally to the project, but trhows an ReferenceError exception

[wemersonrv]

I have a couple of generic functions, and i need to use them globally. So i created a prldfile file at start/functions.ts. But when i try to use it, gives me a ReferenceError message not recognizing the them.

start/functions.ts

async function sleep(ms: number = 1000): Promise<void> {
  return new Promise((_) => setTimeout(_, ms))
}

function randomValue(min: number = 1, max: number = 10): number {
  return Math.floor(Math.random() * (max - min)) + min
}

// ... etc

(node:25237) UnhandledPromiseRejectionWarning: ReferenceError: randomValue is not defined
    at MyService.execute (/Users/wemersonrv/desenvolvimento/projetos/wemersonrv/adonis-test/app/Services/MyService/index.ts:29:13)
    at AppProvider.ready (/Users/wemersonrv/desenvolvimento/projetos/wemersonrv/adonis-test/providers/AppProvider.ts:21:60)
    at /Users/wemersonrv/desenvolvimento/projetos/wemersonrv/adonis-test/node_modules/@adonisjs/application/build/src/Application.js:600:86
    at Array.map (<anonymous>)
    at /Users/wemersonrv/desenvolvimento/projetos/wemersonrv/adonis-test/node_modules/@adonisjs/application/build/src/Application.js:600:59
    at Profiler.profileAsync (/Users/wemersonrv/desenvolvimento/projetos/wemersonrv/adonis-test/node_modules/@adonisjs/profiler/build/src/Profiler/AbstractProfiler.js:20:38)
    at Application.start (/Users/wemersonrv/desenvolvimento/projetos/wemersonrv/adonis-test/node_modules/@adonisjs/application/build/src/Application.js:598:29)
    at AppKernel.start (/Users/wemersonrv/desenvolvimento/projetos/wemersonrv/adonis-test/node_modules/@adonisjs/core/build/src/Ignitor/Kernel/index.js:88:32)
    at /Users/wemersonrv/desenvolvimento/projetos/wemersonrv/adonis-test/node_modules/@adonisjs/core/build/src/Ignitor/HttpServer/index.js:66:35
    at new Promise (<anonymous>)
(Use `node --trace-warnings ...` to show where the warning was created)
(node:25237) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:25237) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

I already check and the file was added to .adonisrc.js preloads section.

How can i fix this?

[Julien-R44]

The simplest, and arguably cleanest, would be to just import them. Why not do this, just out of curiosity?

If you really want to do that, you'll have to use the "global" object (which is like "window" in the browser) and assign your functions to it.

The problem with this is that you'll lose the typing, and you'll have to tell Typescript that these functions exist elsewhere.

https://stackoverflow.com/questions/29544417/nodejs-global-functions
https://stackoverflow.com/questions/35074713/extending-typescript-global-object-in-node-js

[wemersonrv]

The simplest, and arguably cleanest, would be to just import them. Why not do this, just out of curiosity?

As you say, i prefixed each function with an export, then import :

import { randomValue } from 'start/functions'

const value = randomValue(100, 2000)
console.log(`my value is ${value}`

It works !!!! It was simple to make it works. Thanks a lot.

The only issue now is that they works on fine the app namespace, but not inside stuffs injectes on the IoC, like some services/modules. There is a way to solve this ?

Error in a Module injected on IoC

 Cannot find module 'start/functions'
Require stack:
- /Users/wemersonrv/desenvolvimento/projetos/wemersonrv/adonis-test/app/Services/MyService/index.ts
- /Users/wemersonrv/desenvolvimento/projetos/wemersonrv/adonis-test/node_modules/@adonisjs/fold/build/src/Ioc/ImportAliases.js
- /Users/wemersonrv/desenvolvimento/projetos/wemersonrv/adonis-test/node_modules/@adonisjs/fold/build/src/Ioc/index.js
- /Users/wemersonrv/desenvolvimento/projetos/wemersonrv/adonis-test/node_modules/@adonisjs/fold/build/index.js
- /Users/wemersonrv/desenvolvimento/projetos/wemersonrv/adonis-test/node_modules/@adonisjs/application/build/index.js
- /Users/wemersonrv/desenvolvimento/projetos/wemersonrv/adonis-test/node_modules/@adonisjs/assembler/build/src/requireHook/ioc-transformer.js
- /Users/wemersonrv/desenvolvimento/projetos/wemersonrv/adonis-test/node_modules/@poppinss/utils/build/src/esmRequire.js
- /Users/wemersonrv/desenvolvimento/projetos/wemersonrv/adonis-test/node_modules/@poppinss/utils/build/index.js
- /Users/wemersonrv/desenvolvimento/projetos/wemersonrv/adonis-test/node_modules/@adonisjs/require-ts/build/src/Compiler/index.js
- /Users/wemersonrv/desenvolvimento/projetos/wemersonrv/adonis-test/node_modules/@adonisjs/require-ts/build/index.js
- /Users/wemersonrv/desenvolvimento/projetos/wemersonrv/adonis-test/node_modules/@adonisjs/assembler/build/src/requireHook/index.js
- /Users/wemersonrv/desenvolvimento/projetos/wemersonrv/adonis-test/node_modules/@adonisjs/assembler/build/register.js```