jQuery中cookie插件用法实例分析

var dt= new date();
dt.settime(date.gettime() + (3* 60 * 1000));
$.COOKIE('username', 'admin', { expires: dt});

$.removeCOOKIE("username");
$.COOKIE('username',"null");

/*!
 * jQuery COOKIE Plugin v1.4.1
 * https://github.com/carhartl/jquery-COOKIE
 *
 * Copyright 2006, 2014 Klaus Hartl
 * Released under the MIT license
 */
(function (factory) {
  if (typeof define === 'function' && define.amd) {
    // AMD (Register as an anonymous module)
    define(['jquery'], factory);
  } else if (typeof exports === 'object') {
    // Node/CommonJS
    module.exports = factory(require('jquery'));
  } else {
    // Browser globals
    factory(jQuery);
  }
}(function ($) {
  var pluses = /\+/g;
  function encode(s) {
    return config.raw &＃63; s : encodeURIComponent(s);
  }
  function decode(s) {
    return config.raw &＃63; s : decodeURIComponent(s);
  }
  function stringifyCOOKIEValue(value) {
    return encode(config.json &＃63; JSON.stringify(value) : String(value));
  }
  function parseCOOKIEValue(s) {
    if (s.indexOf('"') === 0) {
      // This is a quoted COOKIE as according to RFC2068, unescape...
      s = s.slice(1, -1).replace(/\\"/g, '"').replace(/\\\\/g, '\\');
    }
    try {
      // Replace server-side written pluses with spaces.
      // If we can't decode the COOKIE, ignore it, it's unusable.
      // If we can't parse the COOKIE, ignore it, it's unusable.
      s = decodeURIComponent(s.replace(pluses, ' '));
      return config.json &＃63; JSON.parse(s) : s;
    } catch(e) {}
  }
  function read(s, converter) {
    var value = config.raw &＃63; s : parseCOOKIEValue(s);
    return $.isFunction(converter) &＃63; converter(value) : value;
  }
  var cOnfig= $.COOKIE = function (key, value, options) {
    // Write
    if (arguments.length > 1 && !$.isFunction(value)) {
      optiOns= $.extend({}, config.defaults, options);
      if (typeof options.expires === 'number') {
        var days = options.expires, t = options.expires = new Date();
        t.setMilliseconds(t.getMilliseconds() + days * 864e+5);
      }
      return (document.COOKIE = [
        encode(key), '=', stringifyCOOKIEValue(value),
        options.expires &＃63; '; expires=' + options.expires.toUTCString() : '', // use expires attribute, max-age is not supported by IE
        options.path &＃63; '; path=' + options.path : '',
        options.domain &＃63; '; domain=' + options.domain : '',
        options.secure &＃63; '; secure' : ''
      ].join(''));
    }
    // Read
    var result = key &＃63; undefined : {},
      // To prevent the for loop in the first place assign an empty array
      // in case there are no COOKIEs at all. Also prevents odd result when
      // calling $.COOKIE().
      COOKIEs = document.COOKIE &＃63; document.COOKIE.split('; ') : [],
      i = 0,
      l = COOKIEs.length;
    for (; i