JS重写toString(),打印想要的值

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<head><meta charset="UTF-8"><title></title><script type="text/javascript">function Person(name , age , gender){this.name = name;this.age = age;this.gender = gender;}//修改Person原型的toStringPerson.prototype.toString = function(){return "Person[name="+this.name+",age="+this.age+",gender="+this.gender+"]";};//创建一个Person实例var per = new Person("孙悟空",18,"男");var per2 = new Person("猪八戒",28,"男");//当我们直接在页面中打印一个对象时，事件上是输出的对象的toString()方法的返回值//如果我们希望在输出对象时不输出[object Object]，可以为对象添加一个toString()方法//Person[name=孙悟空,age=18,gender=男]/*per.toString = function(){return "Person[name="+this.name+",age="+this.age+",gender="+this.gender+"]";};*/var result = per.toString();//console.log("result = " + result);//console.log(per.__proto__.__proto__.hasOwnProperty("toString"));console.log(per2.toString());console.log(per.toString());</script>
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<head><meta charset="UTF-8"><title></title><script type="text/javascript">function Person(name , age , gender){this.name = name;this.age = age;this.gender = gender;}//修改Person原型的toStringPerson.prototype.toString = function(){return "Person[name="+this.name+",age="+this.age+",gender="+this.gender+"]";};//创建一个Person实例var per = new Person("孙悟空",18,"男");var per2 = new Person("猪八戒",28,"男");//当我们直接在页面中打印一个对象时，事件上是输出的对象的toString()方法的返回值//如果我们希望在输出对象时不输出[object Object]，可以为对象添加一个toString()方法//Person[name=孙悟空,age=18,gender=男]/*per.toString = function(){return "Person[name="+this.name+",age="+this.age+",gender="+this.gender+"]";};*/var result = per.toString();//console.log("result = " + result);//console.log(per.__proto__.__proto__.hasOwnProperty("toString"));console.log(per2.toString());console.log(per.toString());</script>
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