title: Deleting a cookie from a different domain when running locally
body: <p>Per cookie specification this is not allowed (same principle as Same Origin Policy for ajax calls). As far as SOP is concerned, it does not apply, when you are running your javascript from file:/// (for example inside of a UIWebView). This is well documented and working in my example too. What about cookies though? </p>
  
  <p>I have an app that makes a request to a server via javascript running, for all intends and purposes, locally (file:///). The authentication request sets a cookie with name let's say 'alpha', path: '/' and domain 'serverdomain.com'. During  logout I need to clear the aforementioned cookie but I get the feeling that my attempts fail because I don't have access to it because it is considered to be from a different domain. Does that sound familiar? Or am I way off here? Is there a way to accomplish such a feat?</p>
  
  <p>EXAMPLE</p>
  
  <p>I am running my javascript on Chrome (using file:/// as the URI). I initiate a login and soon enough I can see the following cookie in the cookie manager plugin (this is not the actual cookie but it looks the same except for the name which we can say it is 'alpha'). The cookie is not marked http only but it has the 'session' and 'secure' checkboxes checked (unlike the screenshot below). </p>
  
  <p><img src="https://i.stack.imgur.com/nDg2W.png" alt="screenshot from cookie manager"></p>
  
  <p>Now keep in mind that if I use the 'inspect element' feature of Chrome and go to 'Cookies', I get a 'There are no cookies for this site'. </p>
  
  <p><img src="https://i.stack.imgur.com/Qekgz.png" alt="chrome - inspect element/cookies"></p>
  
  <p>During logoff I need to delete that cookie. So I do this in javascript:</p>
  
  <pre><code>document.cookie="alpha=; expires=Thu, 10 May 2000 15:07:07 GMT"
  </code></pre>
  
  <p>The cookie does not go away. The only way I can make it go away is by deleting it from the cookie manager. Should I be able to delete this cookie (while running from file:///)? If so how?</p>