How do I handle CORS issues when using the Fetch API?

How do I handle CORS issues when using the Fetch API?

CORS, or Cross-Origin Resource Sharing, is a security feature that restricts web pages from making requests to a different domain than the one that served the web page. To handle CORS issues with the Fetch API, you can either configure the server to allow requests from your domain or use a proxy server.

What if I don't have control over the server?

If you don't have control over the server, you can use a proxy server to make the request on your behalf. This way, the browser will only see requests to the proxy, which can be configured to handle CORS.

Can you give me an example of using a proxy?

Sure! You can use a service like 'cors-anywhere' as a proxy. For example, instead of fetching directly from the API, you would do something like: fetch('https://cors-anywhere.herokuapp.com/https://api.example.com/data').

Are there any security concerns with using a proxy?

Yes, using a proxy can expose your requests to the proxy server, so it's important to trust the proxy service you are using. Avoid sending sensitive data through untrusted proxies.