log statements are a noop when bound at the top-level

[SebastienGllmt]

I'm running Deno 2 and I tried to do the following

const levelMethods = {
  [log.levels.TRACE]: log.trace,
  [log.levels.DEBUG]: log.debug,
  [log.levels.INFO]: log.info,
  [log.levels.WARN]: log.warn,
  [log.levels.ERROR]: log.error,
} as const;

function doLog(
    level: keyof typeof levelMethods,
    ...msg: unknown[]
): void {
    levelMethods[level](...msg);
}

However, this prints nothing to the console. If I try and look at the result of levelMethods[level], the type is [Function: noop] which seems to be the default type before things are initialized (see here)

This seems like an initialization order issue though, because if I do

function doLog(
    level: typeof log.levels[keyof typeof log.levels],
    ...msg: unknown[]
): void {
  const levelMethods = {
    [log.levels.TRACE]: log.trace,
    [log.levels.DEBUG]: log.debug,
    [log.levels.INFO]: log.info,
    [log.levels.WARN]: log.warn,
    [log.levels.ERROR]: log.error,
    [log.levels.SILENT]: () => {},
  } as const;

  levelMethods[level](...msg);
}

then everything works

[Mr0grog]

Can you give a more complete picture of your project? Your first example seems to print just fine for me.

My setup: Using Deno 2.1.2, with…

// file: deno.json
{
  "imports": {
    "loglevel": "npm:loglevel"
  }
}

…and:

// file: main.ts
import log from 'loglevel';

const levelMethods = {
  [log.levels.TRACE]: log.trace,
  [log.levels.DEBUG]: log.debug,
  [log.levels.INFO]: log.info,
  [log.levels.WARN]: log.warn,
  [log.levels.ERROR]: log.error,
} as const;
  
function doLog(
  level: keyof typeof levelMethods,
  ...msg: unknown[]
): void {
  levelMethods[level](...msg);
}

doLog(log.levels.WARN, 'Hello from loglevel!');

…then running deno run main.ts prints out Hello from loglevel! exactly as you’d expect.