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[Ask EchoJS] How do I handlie CORS Issues in Fetch API?

 9 months ago
source link: https://www.echojs.com/news/41943
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[Ask EchoJS] How do I handlie CORS Issues in Fetch API?Techi11 16 hours ago.

I'm working on a web development project where I'm using the Fetch API to make cross-origin requests to a different domain. However, I'm running into CORS (Cross-Origin Resource Sharing) issues, and my requests are being blocked. I've tried a few solutions I found online, but I'm still having trouble. Here's a simplified version of my code:

[code]fetch('https://api.example.com/data')
  .then(response => response.json())
  .then(data => {
    console.log(data);
  })
  .catch(error => {
    console.error('Error fetching data:', error);
  });
[/code]

I've heard about using CORS headers on the server-side to allow cross-origin requests, but I'm not sure how to implement them. Can someone guide me on the proper way to handle CORS issues? How do I configure my server to allow requests from my domain? I'm using Express.js on the server side. Any help would be greatly appreciated!
tracker1 12 hours ago. link 1 point
You would need to update the target domain to return appropriate CORS headers, allowing your resource domain, there's nothing you can do from the client.  If you don't control the resource domain, you will need to setup a reverse proxy.

I've generally used Caddy in a Docker container to serve static app resources and revere proxy an /api route as needed.  Most web frameworks will have the option to do the same for while you're in watch/dev mode.
Komsomol 13 hours ago. link 1 point
Usual you would do a reverse proxy - 
https://www.codingninjas.com/studio/library/reverse-proxy-for-express

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