JS对象

JS对象

  <script>
        /*javaScript中，所有键都是字符串，值是任意对象！*/
        /*创建对象*/
        var person = {
            name: "zhangSan",
            age: 3,
            high: 175
        };
        console.log(person.high)

        /*动态删除属性*/
        delete person.high;
        console.log(person);

        /*动态的增加属性*/
        person.hobby = "game";
        console.log(person);

        /*判断属性是否存在这个对象中！ 'XXX' in XXX      所有对象继承了object*/
        console.log('age' in person);
        console.log('3' in person);
        console.log('toString' in person);

        /*判断一个属性是否自身拥有*/
        console.log(person.hasOwnProperty('age'));
        console.log(person.hasOwnProperty('toString'));

    </script>