Cookies

Document

• Read

  Read all cookies accessible from this location

  allCookies = document.cookie;
  

• Write

  Write a new cookie

  document.cookie = newCookie;
  

• Simple cookie framework

  /*\
  |*|
  |*|  :: 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
  |*|
  |*|  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, "\\$&") + "\\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, "\\$&") + "\\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 < nLen; nIdx++) { aKeys[nIdx] = decodeURIComponent(aKeys[nIdx]); }
      return aKeys;
    }
  };
  

JavaScript Cookie

• A simple, lightweight JavaScript API for handling browser cookies

HTTPOnly

• The HTTPOnly cookie attribute can help to mitigate this attack by preventing access to cookie value through Javascript. Read more about Cookies and Security.

References

[1] Docs@MDN, Document.cookie — Get and set the cookies associated with the current document.

[2] Docs@MDN, Simple cookie framework — A little framework: a complete cookies reader/writer with full Unicode support

[3] Venkatesh Appala@StackOverflow, How do I create and read a value from cookie?

[4] JavaScript Cookie@TT4IT, JavaScript Cookie — A simple, lightweight JavaScript API for handling browser cookies