data.js

//     Zepto.js
//     (c) 2010, 2011 Thomas Fuchs
//     Zepto.js may be freely distributed under the MIT license.

// The following code is heavily inspired by jQuery's $.fn.data()

(function($) {
  var data = {},
    uuid = $.uuid = +new Date(),
    exp  = $.expando = 'Zepto' + uuid;

  function isScalar(value) {
    return /boolean|number|string/.test(typeof value);
  }

  function getData(name) {
    var id = this[0][exp];

    return ( id && data[id] && data[id][name] ) ?
      data[id][name] : this.dataAttr(name);
  }

  function setData(name, value) {
    if (isScalar(value)) return this.dataAttr(name, value);

    var id = this[0][exp] = ++uuid;

    data[id]       = data[id] || {};
    data[id][name] = value;

    return this;
  };

  $.fn.dataAttr = $.fn.data;
  $.fn.data     = function(name, value) {
    return value === undefined ?
      getData.call(this, name) :
      setData.call(this, name, value);
  };
})(Zepto);