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  • javascript 继承

    function SuperType(name) {
        this.name = name;
        this.colors = ["red", "blue", "green"];
    }
    SuperType.prototype.sayName = function() {
        alert(this.name);
    }
    
    // 方式一
    function SubType(age) {
        this.age = age;
    }
    SubType.prototype = new SuperType();
    SubType.prototype.syaAge = function() {
        alert(this.age);
    }
    
    // 方式二
    function SubType() {
        SuperType.call(this, "Jerry");
    }
    
    // 方式三,推荐
    function SubType(name, age) {
        SuperType.call(this, name);
        this.age = age;
    }
    SubType.prototype = new SuperType();
    SubType.prototype.sayAge = function() {
        alert(this.age);
    }
    
    // 方式三,推荐
    function object(o) {
        function F() { };
        F.prototype = o;
        return new F();
    }
    function inheritPrototype(subType, superType) {
        var prototype = object(superType.prototype);
        prototype.constructor = subType;
        subType.prototype = prototype;
    }
    function SubType(name, age) {
        SuperType.call(this,name);
        this.age = age;
    }
    inheritPrototype(SubType, SuperType);
    SubType.prototype.sayAge = function() {
        alert(this.age);
    }
    

     

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  • 原文地址:https://www.cnblogs.com/tongqj/p/4083048.html
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