javascript 继承

Posted 2020-09-21 小小高

    //对象冒充实现继承
    function Person() {
        this.speak = function () {
            alert("我是人类");
        };
    }

    function Chinese() {
        Person.call(this);
    }
    var p = new Chinese();
    p.speak();

//对象冒充与原型继承
    function Person(sColor) {
        this.color = sColor;
    }

    Person.prototype.sayColor = function () {
        alert(this.color);
    };

    function Chinese(sColor, sName) {

        Person.call(this, sColor);//对象冒充继承属性

        this.name = sName;
    }

    Chinese.prototype = new Person();//原型继承方法

    Chinese.prototype.sayName = function () {
        alert(this.name);
    };

    var p = new Chinese("red", "高聪");
    p.sayColor();
    p.sayName();