toString，

来源： javaer 分享于 2019-11-02 点击 23855 次点评：161
toString，

<!DOCTYPE html>
<html>
    <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toString
            Person.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);
            console.log(per);
            
            
        </script>
    </head>
    <body>
    </body>
</html>
toString，

toString，

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