Discover how to set up CORS in Supabase, boosting your app's security and adaptability, through this detailed guide.
Setting up Cross-Origin Resource Sharing (CORS) in Supabase is key for letting web apps from different origins talk to your Supabase backend. CORS settings decide which domains get to access your resources, which secures your app but also gives the flexibility needed for frontend work. To do this, tweak your Supabase project's API settings to specify allowed origins, methods, and headers. Knowing how to adjust these settings properly is crucial. It ensures your app runs smoothly without hitting CORS issues.
First things first, log in to your Supabase account. Once you're in, head over to the dashboard of the project where you want to set up CORS.
Pick your project from the dashboard. Then, look at the left sidebar and click on "API". This is where you'll find all the settings for your API, including the CORS stuff.
In the API settings, scroll down a bit until you see the "Config" tab. That's where you'll find the "CORS" option.
Under the "CORS" section, there's a text box labeled "Allowed Origins" or something similar. Type in the domains you want to allow. You can add multiple domains, just separate them with commas, like this:
https://example.com, https://another-example.com
If you want to allow any domain, you can use the wildcard *. But be careful, this can make your API less secure.
Scroll down and hit the "Save" button to apply your changes. This will update your CORS settings and let the specified origins access your resources.
To make sure everything's set up correctly, make a request from one of the allowed origins. Check the network requests in your browser's developer tools. The Access-Control-Allow-Origin header should show one of the domains you specified.
If you run into any issues, double-check the allowed origins for typos or misconfigurations. You might also want to clear your browser cache or try a different browser to rule out cache problems. Checking the server logs in Supabase can also help you spot any CORS-related errors.
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