topic Re: Error: an unknown error occurred while detecting CORS support in ArcGIS JavaScript Maps SDK Questions https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/error-an-unknown-error-occurred-while-detecting/m-p/45959#M4014 <HTML><HEAD></HEAD><BODY><SPAN>Thanks for clarifying this. </SPAN><BR /><BR /><SPAN>I am using a proxy page, so now basically I set esriConfig.defaults.io.corsDetection to false.</SPAN></BODY></HTML> Fri, 14 Feb 2014 15:40:53 GMT ZachLiu1 2014-02-14T15:40:53Z Error: an unknown error occurred while detecting CORS support https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/error-an-unknown-error-occurred-while-detecting/m-p/45957#M4012 <HTML><HEAD></HEAD><BODY><SPAN>I got this message for my application. </SPAN><BR /><BR /><SPAN>Does anyone know what this means? </SPAN><BR /><BR /><SPAN>It seems not to bother the application.</SPAN></BODY></HTML> Thu, 13 Feb 2014 20:51:30 GMT https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/error-an-unknown-error-occurred-while-detecting/m-p/45957#M4012 ZachLiu1 2014-02-13T20:51:30Z Re: Error: an unknown error occurred while detecting CORS support https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/error-an-unknown-error-occurred-while-detecting/m-p/45958#M4013 <HTML><HEAD></HEAD><BODY><BLOCKQUOTE class="jive-quote">I got this message for my application. <BR /><BR />Does anyone know what this means? <BR /><BR />It seems not to bother the application.</BLOCKQUOTE><BR /><BR /><BR /><SPAN>Cross-Origin Resource Sharing (CORS) allows web applications to bypass a browser's </SPAN><A class="jive-link-external-small" href="http://en.wikipedia.org/wiki/Same_origin_policy" rel="nofollow" target="_blank">same origin policy</A><SPAN>. When both the web server and browser support CORS, a </SPAN><A class="jive-link-external-small" href="https://developers.arcgis.com/javascript/jshelp/ags_proxy.html" rel="nofollow" target="_blank">proxy</A><SPAN>&nbsp; is not required to do cross-domain requests. This both simplifies&nbsp; application development and potentially provides a performance boost.&nbsp; Development is simplified because it is no longer necessary to maintain a&nbsp; proxy page on your server. The performance boost comes from accessing a&nbsp; resource directly rather than sending a request back to your server,&nbsp; which then requests the specified URL and returns the result.</SPAN><BR /><BR /><SPAN>For further details please find the below link:</SPAN><BR /><A class="jive-link-external-small" href="https://developers.arcgis.com/javascript/jshelp/inside_defaults.html" rel="nofollow" target="_blank">https://developers.arcgis.com/javascript/jshelp/inside_defaults.html</A><BR /><SPAN>[h=4]Refer to the below:</SPAN><BR /><SPAN>esriConfig.defaults.io.corsDetection</SPAN><STRONG><BR />esriConfig.defaults.io.corsEnabledServers </STRONG><SPAN></SPAN><BR /><SPAN>Hope this helps.</SPAN><BR /><BR /><SPAN>Best Regards,</SPAN><BR /><SPAN>Manish Patel</SPAN></BODY></HTML> Fri, 14 Feb 2014 02:44:53 GMT https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/error-an-unknown-error-occurred-while-detecting/m-p/45958#M4013 ManishkumarPatel 2014-02-14T02:44:53Z Re: Error: an unknown error occurred while detecting CORS support https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/error-an-unknown-error-occurred-while-detecting/m-p/45959#M4014 <HTML><HEAD></HEAD><BODY><SPAN>Thanks for clarifying this. </SPAN><BR /><BR /><SPAN>I am using a proxy page, so now basically I set esriConfig.defaults.io.corsDetection to false.</SPAN></BODY></HTML> Fri, 14 Feb 2014 15:40:53 GMT https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/error-an-unknown-error-occurred-while-detecting/m-p/45959#M4014 ZachLiu1 2014-02-14T15:40:53Z