How to update and delete a cookie

Question

I need help to know how to update values and how to delete a cookie created from this code  I m new to JavaScript so it s great if anyone can help me   function getCookie c name         var i x y ARRcookies   document cookie split            for  i 0 i lt ARRcookies length i                x   ARRcookies i  substr 0 ARRcookies i  indexOf                  y   ARRcookies i  substr ARRcookies i  indexOf      1             x   x replace    s   s   g                if  x  c name                  return unescape y                          function setCookie c name value exdays        var exdate   new Date        exdate setDate exdate getDate     exdays       var c value   escape value      exdays  null                                               expires   exdate toUTCString        document cookie c name         c value      function check2Cookie          var username getCookie  username         if  username  null  amp  amp  username                 username   0            setCookie  username  username 1000               else            username               if  username  null  amp  amp  username                       username   0                  setCookie  username  username 1000                         This is the code for cookie creation   Code for creating is setCookie  username  username 1000    Now how to update this cookie and delete this cookie

User · Answer

The cookie API is kind of lame  Let me clarify     You don t update cookies  you overwrite them       document cookie    username Arnold      Create  username  cookie     document cookie    username Chuck      Update  i e  overwrite  the  username  cookie to  Chuck    You also don t delete cookies  you expire them by setting the expires key to a time in the past  -1 works too    Source  https   developer mozilla org en-US docs Web API document cookie

User · Answer

check this out A little framework  a complete cookies reader writer with full Unicode support                  cookies js             A complete cookies reader writer framework with full unicode support           Revision  1 - September 4  2014          https   developer mozilla org en-US docs Web API document cookie      https   developer mozilla org User fusionchess      https   github com madmurphy cookies js          This framework is released under the GNU Public License  version 3 or later       http   www gnu org licenses gpl-3 0-standalone html          Syntaxes             docCookies setItem name  value   end   path   domain   secure             docCookies getItem name         docCookies removeItem name   path   domain           docCookies hasItem name         docCookies keys            var docCookies       getItem  function  sKey        if   sKey    return null        return decodeURIComponent document cookie replace new RegExp                s     encodeURIComponent sKey  replace    -        g       amp         s      s                       1       null         setItem  function  sKey  sValue  vEnd  sPath  sDomain  bSecure        if   sKey         expires max -age path domain secure   i test sKey     return false        var sExpires           if  vEnd          switch  vEnd constructor            case Number            sExpires   vEnd     Infinity      expires Fri  31 Dec 9999 23 59 59 GMT       max-age     vEnd            break          case String            sExpires      expires     vEnd            break          case Date            sExpires      expires     vEnd toUTCString              break                    document cookie   encodeURIComponent sKey          encodeURIComponent sValue    sExpires    sDomain      domain     sDomain          sPath      path     sPath          bSecure      secure             return true         removeItem  function  sKey  sPath  sDomain        if   this hasItem sKey     return false        document cookie   encodeURIComponent sKey        expires Thu  01 Jan 1970 00 00 00 GMT     sDomain      domain     sDomain          sPath      path     sPath            return true         hasItem  function  sKey        if   sKey    return false        return  new RegExp          s      encodeURIComponent sKey  replace    -        g       amp         s        test document cookie          keys  function          var aKeys   document cookie replace         s                    s   s                 1    g      split   s               s         for  var nLen   aKeys length  nIdx   0  nIdx  lt  nLen  nIdx      aKeys nIdx    decodeURIComponent aKeys nIdx          return aKeys

User · Answer

http   www quirksmode org js cookies html  function createCookie name value days        if  days            var date   new Date            date setTime date getTime    days 24 60 60 1000            var expires      expires   date toGMTString              else var expires           document cookie   name     value expires    path        function readCookie name        var nameEQ   name            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    -1

User · Answer

http   www quirksmode org js cookies html  update would just be resetting it using createCookie  function createCookie name value days        if  days            var date   new Date            date setTime date getTime      days   24   60   60  1000            var expires      expires     date toGMTString          else           var expires                 document cookie   name         value   expires      path        function readCookie name        var nameEQ   name            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    -1

[javascript] How to update and delete a cookie?

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