js继承

    // 父类
    function Parent(name) {
        this.name = name;
    }

    Parent.prototype.show = function () {
        return this.name;
    };

    // 子类 继承Parent
    function Child(name) {
        // 借用构造函数，只能继承父类this的属性
        Parent.apply(this, arguments);
    }

    // 设置原型 继承父类this属性以及父类的原型
    Child.prototype = new Parent();

    Child.prototype = Parent.prototype;

    function inherit(Child, Parent) {
        // 空白的代理函数
        function F() {}

        // 代理函数与父原型建立直接链接关系
        F.prototype = Parent.prototype;

        // 因为F函数是空白的，所以也不存在模式1当中的问题
        Child.prototype = new F();

        // 修正constructor指向（此修复会使得constructor变成可枚举）
        Child.prototype.constructor = Child;
    }

    // 父类
    function Parent(name) {
        this.name = name;
    }

    Parent.prototype.show = function () {
        return this.name;
    };

    // 子类 继承Parent
    function Child(name) {
        // 借用构造函数，只能继承父类this的属性
        Parent.apply(this, arguments);
    }

    // 用 3.代理构造函数
    inherit(Child, Parent);

    // 与 3.代理构造函数 等价 【Object.create 实现见下面】
    Child.prototype = Object.create(Parent.prototype);

    var parent = {
        name: "dad"
    };

    var child = Object.create(parent);

    console.log(child.name); // "dad"

    if (typeof Object.create === 'undefined') {
        Object.create = function (o) {
            function F() {}
            F.prototype = o;
            return new F();
        };
    }

    $.extend(child, parent);
    // 这时，child对象就具有parent对象的属性和方法，即被扩展（extend）了

    function clone(parent, child) {
        child = child || {};

        for (var key in parent) {
            if (parent.hasOwnProperty(key)) {
                child[key] = parent[key];
            }
        }
        return child;
    }

    function cloneDeep(parent, child) {
        child = child || {};

        for (var key in parent) {
            if (parent.hasOwnProperty(key)) {
                if (typeof parent[key] === 'object') {
                    child[key] Object.prototype.toString.call(parent[key]) === '[object Array]' ? [] : {};
                    cloneDeep(parent[key], child[key]);
                }
                else {
                    child[key] = parent[key];
                }
            }
        }
        return child;
    }

                 var gitalk = new Gitalk({                     clientID: '82f3fb6574634b43d203',                     clientSecret: '5790d9fdbfe9340d29810b694b3b2070a9a3b492',                     repo: 'zfengqi.github.io',                     owner: 'zfengqi',                     admin: ['zfengqi'],                     distractionFreeMode: true,                     id: window.location.pathname,                     });                     gitalk.render('gitalk-container');