nodebook/20191117/20171117.md
2019-11-30 22:10:40 +08:00

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## js复习
* js的作用
* 处理表单
* 弱类型语言
## js 高阶
* 面向对象
* 不关注过程,只关注结果
* 是模拟的类,抽象
* 特点
* 封装:把一个功能封装成一个函数,把代码放进文件,把变量放进数组,把表达式放进函数,能重用的东西封装
* 继承类与类的关系js是模拟类本质基于原型对象
* 多态:同一个行为,对不同的对象产生不同效果
* Object Oriented Programming 面向对象程序设计 oop
* Application Programming Interface 应用程序接口 api