8000 TypeError: log4js.getLogger is not a function · Issue #1410 · log4js-node/log4js-node · GitHub
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TypeError: log4js.getLogger is not a function #1410

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TheChilliPL opened this issue Jan 4, 2024 · 6 8000 comments
Open

TypeError: log4js.getLogger is not a function #1410

TheChilliPL opened this issue Jan 4, 2024 · 6 comments

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@TheChilliPL
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Trying to use anything in log4js causes a TypeError. IDE sees all the methods correctly, but TypeScript itself does not.

D:\Projects\eng_to_ipa>npm start -- trans

> eng-to-ipa@0.1.0 start
> npx tsx src/cli.ts trans

D:\Projects\eng_to_ipa\src\main.ts:3
export let defaultLogger = log4js.getLogger();
                                  ^


TypeError: log4js.getLogger is not a function
    at <anonymous> (D:\Projects\eng_to_ipa\src\main.ts:3:35)
    at ModuleJob.run (node:internal/modules/esm/module_job:218:25)
    at async ModuleLoader.import (node:internal/modules/esm/loader:329:24)
    at async loadESM (node:internal/process/esm_loader:28:7)
    at async handleMainPromise (node:internal/modules/run_main:120:12)

Node.js v21.5.0

D:\Projects\eng_to_ipa>

Importing with import { getLogger } from "log4js" doesn't work either
@lamweili
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lamweili commented Jan 4, 2024

What's your import statement?
Could you show what's in your main.ts?

Did you try this?

import * as log4js from "log4js";
log4js.configure({
  appenders: { cheese: { type: "file", filename: "cheese.log" } },
  categories: { default: { appenders: ["cheese"], level: "error" } },
});

const logger = log4js.getLogger();
logger.level = "debug";
logger.debug("Some debug messages");

(src: https://github.com/log4js-node/log4js-node?tab=readme-ov-file#typescript)

@TheChilliPL
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The whole main.ts is just

import * as log4js from "log4js";

export let defaultLogger = log4js.getLogger();

If I do configure first, it just does

TypeError: log4js.configure is not a function

@relandboyle
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@TheChilliPL @lamweili
What was the resolution here? I'm running into the same issue, I think.

@TheChilliPL
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@relandboyle Never fixed it, just never started using this logger, because I don't have the time necessary to debug this issue. If you find a way to fix it, however, please do let know!

@MizuYaYa
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import log4js from "log4js";

const logger = log4js.getLogger();
logger.level = "debug";

Now I was able to do it.
Hope this is useful.

@cjsilva-umich
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import log4js from "log4js";

const logger = log4js.getLogger();
logger.level = "debug";

Now I was able to do it. Hope this is useful.

This is the correct way to import. The documentation really needs to be updated. Just lost a lot of time trying to understand why I was getting the "log4js.[blank] is not a function" errors.

@wbw1537 wbw1537 mentioned this issue Jan 22, 2025
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Update typescript usage in README.md wbw1537/log4js-node
5 participants
@TheChilliPL @lamweili @cjsilva-umich @relandboyle @MizuYaYa
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