JS中回调函数(callback)理解
https://blog.csdn.net/undericon/article/details/81188923
【一句话攻略】彻底理解JS中的回调(Callback)函数
https://blog.csdn.net/rockage/article/details/79513450
js的面试与笔试--JavaScript prototype原型和原型链详解
https://blog.csdn.net/qq_30904985/article/details/81248613
php函数之默认参数函数
https://www.cnblogs.com/aademeng/articles/9194725.html
js面试笔试--prototype详解
https://blog.csdn.net/qq_30904985/article/details/81240791
帮你彻底搞懂JS中的prototype、proto与constructor（图解）
https://blog.csdn.net/cc18868876837/article/details/81211729
prototype, proto, constructor
https://blog.csdn.net/lyt_angularjs/article/details/100729591
js的原型和原型链
https://www.jianshu.com/p/be7c95714586
