javascript高级知识点——实例类型

function Ninja(){} 
 
var ninja = new Ninja(); 
 
console.log( typeof ninja == "object", "仍然是对象" );   
console.log( ninja instanceof Ninja, "是Ninja的实例" ); 
console.log( ninja.constructor == Ninja, "ninja对象由Ninja创造" );

function Ninja(){} 
var ninja = new Ninja(); 
var ninjaB = new ninja.constructor(); 
 
console.log( ninjaB instanceof Ninja);