Web_1 web architecture?
HyperText Markup Language
主动指针（多媒体：图片、音频等
被动指针（href
Web Browser Architecture
A controller
A set of clients
A set of interpreters
Web type
Static web document
Active web document
- Textual representation: js，可以改变网页内控件
- Binary representation: 相对独立，与网页的控件没有交互
==typescript==
Dynamic web document
runs on web server : can create a html document each time a request arrives
Common Gateway Interface
==install php(first) , apache==
不考虑网页状态，不断动态更新可能会导致服务器压力很大
由此，Ajax诞生
