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ravi
answered Apr 24 '23 00:00
Cross-origin requests refer to requests made from a web page hosted on one domain to a different domain. Such requests are restricted by web browsers by default for security reasons, as they may be used by malicious scripts to make unauthorized requests on behalf of the user.
To enable cross-origin requests, the server hosting the requested resource must send the appropriate headers. This mechanism is called CORS (Cross-Origin Resource Sharing) and involves setting headers such as Access-Control-Allow-Origin to specify which domains are allowed to make requests to the server, and Access-Control-Allow-Methods to specify which HTTP methods (e.g. GET, POST, PUT, DELETE) are allowed.
There are also other techniques to enable cross-origin requests, such as JSONP (JSON with Padding) and using a proxy server. However, these techniques have limitations and are not as widely used as CORS.