asp.net mvc - MVC website CORS -

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I have a button on a watch page, which does a postback that clicks the button. Do I have to implement CORS for this scenario? Does it come under a single basic policy?

My JS file contains the code 

  $ ('# submitBtn'). Click (function () {form.action = '/ go / signin'; form.submit ();}});    
 
 
 If it's in the same domain, you do not need to handle the corse is; The call only happens when you are requesting outside your domain for excellent viewing or see.

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