TypeError: Failed to fetch
Most likely cause: Network issue such as no internet, server down, or firewall blocking the request
Try first: Check browser console for details
Likely causes
- Network issue such as no internet, server down, or firewall blocking the requestmost likely
- CORS policy on the target server rejecting the request from this originpossible
- Invalid URL, missing headers, or SSL certificate problemless likely
How to fix it
Check browser console for detailsSafe
Open the browser developer tools (F12 or Ctrl+Shift+I), go to the Network or Console tab, and reload the page to see the exact URL and status of the failed request.
Test basic connectivitySafe
Try loading the same URL directly in a new browser tab or use a different network to confirm if the target server is reachable.
Review the fetch call in codeSafe
Ensure the URL is correct, the server allows the request origin, and any required headers or credentials are properly set.
If that didn't fix it
Add a .catch() handler to the fetch call and log the full error object to see the exact failure reason.
When to see a technician
If this error appears in production code you maintain, have a web developer review the network request and server configuration.
Quick answers
- What does TypeError: Failed to fetch mean?
- This JavaScript error occurs when code using the fetch() function cannot complete a network request to load data, usually because the connection failed or was blocked.
- What causes TypeError: Failed to fetch?
- Network issue such as no internet, server down, or firewall blocking the request. (most likely) CORS policy on the target server rejecting the request from this origin. (possible) Invalid URL, missing headers, or SSL certificate problem. (less likely)
- How do I fix TypeError: Failed to fetch?
- Try these in order, safest first: 1. Check browser console for details. 2. Test basic connectivity. 3. Review the fetch call in code.
- What if that didn't fix it?
- Add a .catch() handler to the fetch call and log the full error object to see the exact failure reason.
- When should I see a technician?
- If this error appears in production code you maintain, have a web developer review the network request and server configuration.