![]() For example, XMLHttpRequest and the Fetch API follow the same-origin policy. įor security reasons, browsers restrict cross-origin HTTP requests initiated from scripts. In that preflight, the browser sends headers that indicate the HTTP method and headers that will be used in the actual request.Īn example of a cross-origin request: the front-end JavaScript code served from uses XMLHttpRequest to make a request for. CORS also relies on a mechanism by which browsers make a "preflight" request to the server hosting the cross-origin resource, in order to check that the server will permit the actual request. Permissions-Policy: xr-spatial-tracking ExperimentalĬross-Origin Resource Sharing ( CORS) is an HTTP-header based mechanism that allows a server to indicate any origins (domain, scheme, or port) other than its own from which a browser should permit loading resources.Permissions-Policy: speaker-selection Experimental.Permissions-Policy: serial Experimental.Permissions-Policy: screen-wake-lock Experimental.Permissions-Policy: publickey-credentials-get Experimental.Permissions-Policy: picture-in-picture Experimental.Permissions-Policy: payment Experimental.Permissions-Policy: magnetometer Experimental.Permissions-Policy: local-fonts Experimental.Permissions-Policy: idle-detection Experimental.Permissions-Policy: identity-credentials-get Experimental.Permissions-Policy: gyroscope Experimental. ![]()
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