Ask any question about JavaScript here... and get an instant response.

Why does my browser console show a CORS error when importing an ES6 module from a CDN?

Asked on Nov 14, 2025

Answer

CORS (Cross-Origin Resource Sharing) errors occur when a web page tries to make requests to a different domain than the one that served the web page, and the server does not allow such requests. When importing an ES6 module from a CDN, the server must explicitly allow cross-origin requests for the module to be loaded successfully.

<!-- BEGIN COPY / PASTE -->
        // Example of importing an ES6 module from a CDN
        import { exampleFunction } from 'https://example-cdn.com/module.js';

        exampleFunction();
        <!-- END COPY / PASTE -->

Additional Comment:

Ensure the CDN server has the correct CORS headers set, such as "Access-Control-Allow-Origin: *".
Check the browser console for specific CORS error messages to understand what might be missing.
Consider using a local server for development to avoid CORS issues during testing.

✅ Answered with JavaScript best practices.

Ask any question about JavaScript here... and get an instant response.

Why does my browser console show a CORS error when importing an ES6 module from a CDN?

Asked on Nov 14, 2025

Answer

The Q&A Network