How to save Model data

Prop.js

var ModelMixin = {
  
  get: function ( key , args ) {
    var isFn = (typeof this[key] === 'function');
    return  isFn? this[key].apply(this,args): this[key] ;
  }

  ,set: function ( key, value ) {
    if(typeof key === 'string') {
      this[key] = value;
      return value;
    }
   
    for(i in key) {
      this.set(i,key[i]);
    }
    return key;
  }

};

StorageProp.js

var ModelMixin = {

  _storage: {}

  ,get: function ( key , args ) {
    var isFn = (typeof this[key] === 'function');
    return  isFn? this[key].apply(this,args): this._storage[key] ;
  }

  ,set: function ( key, value ) {
    var context;
    
    if(typeof key === 'string') {
      context = (typeof this[key] !== 'undefined') ? this : this._storage;
      context[key] = value;
      return value;
    }
   
    for(i in key) {
      this.set(i,key[i]);
    }
    return key;
  }

};