Nginx Reverse Proxy do not load JS and CSS from other server
Nginx Reverse Proxy do not load JS and CSS from other server
When an Nginx reverse proxy fails to load JavaScript and CSS from the backend server, it typically results from how browsers interpret asset paths or security policies. The primary cause is often relative paths in the proxied application; the browser, receiving HTML from Nginx, requests assets like `/css/style.css` from Nginx itself, leading to 404 errors if Nginx isn't configured to serve or proxy these specific paths. Another common issue is CORS (Cross-Origin Resource Sharing). If JS/CSS assets reside on a different domain or port than the main HTML, browsers will block them unless the backend explicitly sends `Access-Control-Allow-Origin` headers. Debugging involves browser developer tools to identify 404s, network failures, or CORS errors. Solutions include configuring the backend application to use absolute URLs for assets, adding correct CORS headers on the backend, or explicitly telling Nginx to proxy static asset requests via dedicated `location` blocks and `proxy_pass`. Ensure Nginx isn't attempting to serve non-existent local files.
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