Hey everyone, I’m having a weird issue with the Fetch API. I’ve got a web app that I built using Webpack, and I’m trying to use Fetch for making HTTP requests. The problem is that after I log in successfully, the Cookie header is present in future requests, but Fetch seems to be ignoring it completely. As a result, all my Fetch requests are coming back as unauthorized.
I’m confused because I use Fetch in a React Native app too, and it works fine there. No cookie problems at all. So I’m wondering if this is a limitation of the Fetch API in web browsers, or if I’m doing something wrong.
Has anyone else run into this issue? Is there a way to make Fetch play nice with cookies in a web environment? I’d really appreciate any insights or workarounds you might have. Thanks!
hey emma, i had this issue too. check ur server config - it might be blocking cookies. also, try adding ‘withCredentials: true’ to ur fetch options. that fixed it for me. if that doesnt work, maybe look into using axios instead? it handles cookies better imo. good luck!
I’ve faced a similar issue before, and it turns out the problem is likely related to the CORS policy. By default, Fetch doesn’t send credentials (including cookies) for cross-origin requests. To fix this, you need to set the ‘credentials’ option to ‘include’ in your Fetch request.
Try modifying your Fetch calls like this:
fetch(url, {
credentials: ‘include’,
// other options…
})
This should tell the browser to send cookies with the request, even for cross-origin calls. Also, make sure your server is configured to accept credentials from your front-end domain.
If that doesn’t solve it, check if your cookies are set with the ‘SameSite’ attribute. Some browsers might block cookies without this attribute in cross-site requests. You might need to set it to ‘None’ and ensure your connection is secure (HTTPS).
Hope this helps! Let me know if you need any more details.
It sounds like you’re dealing with a common Fetch API quirk in web browsers. The key difference between your React Native app and web app is likely the default CORS behavior. Web browsers are more strict about cross-origin requests for security reasons.
To resolve this, you need to explicitly tell Fetch to include credentials. Modify your Fetch calls like this:
fetch(url, {
credentials: ‘include’,
// other options…
})
Also, ensure your server is set up to handle these credentials properly. It should include the ‘Access-Control-Allow-Credentials: true’ header in its responses.
If you’re still having issues, check your cookie settings. Make sure they’re not HttpOnly and that the domain is correctly set. Sometimes, subtle configuration issues can cause unexpected behavior with cookies in web environments.