why CORS is important?

Secure cross-origin requests and data transfers between browsers and servers are supported via the CORS mechanism. To reduce the dangers of cross-origin HTTP requests, modern browsers employ CORS in APIs like XMLHttpRequest or Fetch.

The CORS protocol supports secure cross-origin requests and data transfers between browsers and servers. Modern browsers use CORS in APIs like XMLHttpRequest or Fetch to lessen the risks of cross-origin HTTP queries.