How can I delete all cookies with JavaScript

Question

I have written code to save cookies in JavaScript  Now I need to clear the cookies irrespective of values that I assigned  Are there any script modules to delete all cookies that were generated by Javascript  My Sample Code  document cookie    ppkcookie2 another test  expires Fri  3 Aug 2001 20 47 11 UTC  path     function createCookie name value days        if  days            var date   new Date            date setTime date getTime    days 24 60 60 1000            var expires    quot   expires  quot  date toGMTString              else var expires    quot  quot       document cookie   name  quot   quot  value expires  quot   path   quot      function readCookie name        var nameEQ   name    quot   quot       var ca   document cookie split           for var i 0 i  lt  ca length i              var c   ca i           while  c charAt 0        c   c substring 1 c length           if  c indexOf nameEQ     0  return c substring nameEQ length c length             return null     function eraseCookie name        createCookie name  quot  quot  -1      How else could I clear all of the cookies  Will there will be any problems when I test the code on the webserver

User · Accepted Answer

On the face of it  it looks okay - if you call eraseCookie   on each cookie that is read from document cookie  then all of your cookies will be gone   Try this   var cookies   document cookie split       for  var i   0  i  lt  cookies length  i      eraseCookie cookies i  split      0      All of this with the following caveat     JavaScript cannot remove cookies that have the HttpOnly flag set

User · Answer

This is a function we are using in our application and it is working fine   delete cookie  No argument method  function clearListCookies            var cookies   document cookie split           for  var i   0  i  lt  cookies length  i                     var spcook    cookies i  split               deleteCookie spcook 0              function deleteCookie cookiename                var d   new Date            d setDate d getDate   - 1           var expires     expires   d          var name cookiename            alert name           var value             document cookie   name         value   expires      path  acc html                                 window location          TO REFRESH THE PAGE     Edit  This will delete the cookie by setting it to yesterday s date

User · Answer

Why do you use new Date instead of a static UTC string       function clearListCookies        var cookies   document cookie split               for  var i   0  i  lt  cookies length  i                    var spcook    cookies i  split                   document cookie   spcook 0       expires Thu  21 Sep 1979 00 00 01 UTC

User · Answer

There is no 100  solution to delete browser cookies   The problem is that cookies are uniquely identified by not just by their key  name  but also their  domain  and  path    Without knowing the  domain  and  path  of a cookie  you cannot reliably delete it  This information is not available through JavaScript s document cookie  It s not available through the HTTP Cookie header either   However  if you know the name  path and domain of a cookie  then you can clear it by setting an empty cookie with an expiry date in the past  for example   function clearCookie name  domain  path       var domain   domain    document domain      var path   path             document cookie   name       expires      new Date      domain     domain      path     path

[javascript] How can I delete all cookies with JavaScript?

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