ReferenceError: __dirname is not defined node js

The error ReferenceError: __dirname is not defined occurs in Node.js when __dirname is used in an environment where it is not automatically available, such as in ES modules (when "type": "module" is specified in your package.json) or in certain contexts like the REPL (interactive Node.js shell).
1. For ES Modules (with "type": "module" in package.json): If you're using ES modules, __dirname is not available by default. You can recreate it using import.meta.url.

Here's how to define __dirname manually in ES modules:

import { fileURLToPath } from 'url';
import { dirname } from 'path';

const __filename = fileURLToPath(import.meta.url);
const __dirname = dirname(__filename);
2. For CommonJS (without "type": "module"): In CommonJS modules, __dirname is normally available by default. If you get this error, ensure that you're not using "type": "module" in your package.json. If you are, either switch to CommonJS or use the above workaround for ES modules.

3. For Node.js REPL: If you're running code in the Node.js REPL (interactive shell), __dirname is not available. To work around this, you can use process.cwd() to get the current working directory:

console.log(process.cwd());

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