var engineer = { name: 'Joe Sixpack', salary: 50 };
var interceptor = {
 set: function (receiver, property, value) {
  console.log(property, 'is changed to', value);
  receiver[property] = value;
 }
};
engineer = Proxy(engineer, interceptor);

engineer.salary = 60;

salary is changed to 60

proxy:{//数据代理
//       type:'localstorage',
//       id:'bills',
    // limitParam:'limit',
    // pageParam:'page',
    //将用户代理改为sql，通过websql来解决localstorage的5MB存储上限的问题
    type:'sql',
    database:'myDB',
    table:'bill',
},
//filters:[{property:"kind",value:"无"}],//过滤属性
listeners:{
    removerecords:function(){
      console.log("数据被删除");
    },
    addrecords:function(){
      console.log("数据被追加");
    },
    updaterecord:function(){
      console.log("数据被修改");
    },
}

var foo = {
  foo: function () {
    console.log("foo")
  }
};
var bar = {
  bar: function () {
    console.log("bar")
  }
};
var sonOfFoo = Object.create(foo);
sonOfFoo.foo();   //"foo"
var sonOfBar = Object.create(bar);
sonOfBar.bar();   //"bar"
//怎么才能既有foo方法又有bar方法?

sonOfFooBar = new Proxy({}, {
  get: function (target, name) {
    return target[name] || foo[name] || bar[name];
  }
})
sonOfFooBar.foo();  //"foo",有foo方法,继承自对象foo
sonOfFooBar.bar();  //"bar",也有bar方法,继承自对象bar