Create a proxy window object using javascript

Proxy Window Object

handler = {
    get: function(target, property, receiver) { 
        let targetObj = target[property];        
        if(typeof targetObj == "function") { 
          return (...args) => target[property].apply(target,args)
        } else {
            return targetObj;
        }            
    }
}
windowProxyObject = new Proxy(window, handler);

Example: 
windowProxyObject.document.getElementsByTagName('HTML');