Why jsp doesn't have its own vue?

[zhcnyuyang]

I think it would be more easy for the server script languages such as PHP or JSP to build up their own SPA frame. In JSP, you can read the request url from the var request, and then include different modules for different url. You can First build up a page, lead all requests to it. Then in this page the jsp program gets the request url, then parse it, and include different jsp files for different url. It can be more easy to do this on jsp. So why before vue.js or react.js, nobody tried to do so in JSP or PHP?

[zhcnyuyang]

I have known my silly. Please delete my question.