Javascript – Error [ERR_PACKAGE_PATH_NOT_EXPORTED]: Package subpath './v4' is not defined by "exports" in C:Usermern-appBACKENDnode_modulesuuidpackage.json

The error message you're encountering, Error [ERR_PACKAGE_PATH_NOT_EXPORTED]: Package subpath './v4' is not defined by "exports", indicates that the subpath ./v4 is not available as an export from the uuid package. This is a common issue when using certain versions of Node.js with the uuid package.

The uuid package changed its structure starting from version 8.0.0, and the way to import specific UUID versions like v4 has been modified.

Here’s how you can resolve this:

Step 1: Update Your Import Statement In your code, update the import statement to use the new structure provided by the uuid package.
Here's how you can do it:

For ES Modules:
import { v4 as uuidv4 } from 'uuid';
For CommonJS Modules:
const { v4: uuidv4 } = require('uuid');

Step 2: Ensure You Have the Correct Version of uuid Make sure you have uuid version 8.0.0 or later installed.

You can check the version in your package.json file or by running: npm list uuid
If you need to update uuid to the latest version, run: npm install uuid@latest

Step 3: Check Your Node.js Version Ensure that your Node.js version supports the module syntax you are using. Node.js 14 and above fully supports ES Modules, but if you are using an older version, you may need to stick with CommonJS.

Example Code Here is an example of how you can update your code based on the module system you are using:

ES Modules:

import { v4 as uuidv4 } from 'uuid';

const uniqueId = uuidv4();
console.log(uniqueId);

CommonJS:

const { v4: uuidv4 } = require('uuid');

const uniqueId = uuidv4();
console.log(uniqueId);

By updating your import statements and ensuring you are using the correct version of the uuid package, you should be able to resolve the ERR_PACKAGE_PATH_NOT_EXPORTED error.