JSFiddle - React, Tailwind, and code Playground

JavaScript

// 基类
function Class() {}

// 将extend和create置于prototype对象中,以便子类继承
Class.prototype.extend = function () {};
Class.prototype.create = function () {};

// 为了能在基类上直接以.extend的方式进行调用
Class.extend = function (props) {
    return this.prototype.extend.call(this, props);
}

Class.prototype.create = function (props) {
    /*
        create实际上是对new的封装;
        create返回的实例实际上就是new构造出的实例;
        this即指向调用当前create的构造函数;
    */
    var instance = new this();
    /*
        将传入的参数作为该实例的“私有”属性,
        更准确应该说是“实例属性”,因为并非私有
        而是这个实例独有
    */
    for (var name in props) {
        instance[name] = props[name];
    }
    return instance;
}

Class.prototype.extend = function (props) {
    /*
        派生出来的新的子类
    */
    var SubClass = function () {};
    /*
        继承父类的属性和方法,
        当然前提是父类的属性都放在prototype中
        而非上面create方法的“实例属性”中
    */
    SubClass.prototype = Object.create(this.prototype);
    // 并且添加自己的方法和属性
    for (var name in props) {
        SubClass.prototype[name] = props[name];
    }
    SubClass.prototype.constructor = SubClass;

    /*
        介于需要以.extend的方式和.create的方式调用:
    */
    SubClass.extend = SubClass.prototype.extend;
    SubClass.create = SubClass.prototype.create;

    return SubClass;
}

var Human = Class.extend({
    say: function () {
        console.log("Hello");
    }
});

var human = Human.create();
human.say();

var Man = Human.extend({
    walk: function () {
        console.log("walk");
    }
});

var man = Man.create({
    name: "Lee",
    age: 22
});

console.log(man);
man.say();
man.walk();