How do you fix a CORS error?
On the server side: set the Access-Control-Allow-Origin header to allow your origin, or route through your own backend proxy. In development, a bundler proxy works. Never disable CORS for users.
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CORS stands for Cross-Origin Resource Sharing. It is a browser mechanism that lets a server explicitly allow cross-origin requests, relaxing the Same-Origin Policy in a controlled way through response headers.
To prevent malicious websites from making requests to other sites on behalf of the user. Without it, any site could make requests to your bank or email using the user's cookies, which would be a serious security risk.
Because Postman is not a browser and does not enforce CORS. The browser blocks the response if the server did not allow your origin. The request reaches the server; the browser just refuses to hand you the response.
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