Comments (1)
首先介绍一下自己
js内存空间 -> this.a
JS变量类型分为两种即 原始类型(Number, String, Boolean, null, undefined)与引用类型(Object)
- 栈: 遵循着后进先出,先进后出的原则, 属于一级缓存, 地位相当于cpu的寄存器, 由编译器自动分配释放, 读写快, 存储的都是固定值(也就是原始类型)
- 堆: 属于二级缓存,由我们分配释放, 要是没有手动的释放,在调用结束后可能由GC回收,其生命周期由虚拟机的垃圾回收算法来决定。存储的是引用类型;
this.a -> javascript中的this指向问题
作用域绑定 3种
- =>
- let that = this
- bind
原型链
setTimeout 会发生什么
setTimeout(() => {}, 0)
promise的实现 -> catch err -> reject
事件循环 -> event-loop-timers-and-nexttick
css3用了些什么
- 2种方式实现 长宽100到300 过渡
- 2种方式居中
浏览器缓存的几种
TCP/IP协议3次握手 TCP/IP协议四层模型
from blog.
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