if(!Object.prototype.watchChange){var isFunction=function(e){return e&&"[object Function]"==={}.toString.call(e)};Object.defineProperty(Object.prototype,"watchChange",{enumerable:!1,configurable:!0,writable:!1,value:function(e,t){var n=this;function r(e,t){var r=n[e],i=r;delete n[e]&&Object.defineProperty(n,e,{get:function(){return i},set:function(c){return i=t.call(n,e,r,c)},enumerable:!0,configurable:!0})}if(isFunction(e))for(var i in this)new r(i,e);else new r(e,t)}})}Object.prototype.unwatchChange||Object.defineProperty(Object.prototype,"unwatchChange",{enumerable:!1,configurable:!0,writable:!1,value:function(e){var t=this[e];delete this[e],this[e]=t}});