问题
I am using bootstrap 3 in my project. I see that Bootstrap 4 is a major rewrite of almost the entire Bootstrap project. But is there any necessity to migrate to bootstrap 4 from 3?
回答1:
To make your project a bit future-proof!
http://upgrade-bootstrap.bootply.com gives an overview in code for what is different from Bootstrap 3 to 4, I suggest you visit it.
Also it seems there are several changes, regarding:
- Browser support
- Global changes
- Components
- Misc
and more, as mentioned in here, which you should take into account. Notice that it also confirms what you are claiming:
Bootstrap 4 is a major rewrite of almost the entire project.
It's not that you must upgrade now or your app will live in hell, but it seems that many new cool things are happening in bootstrap-4, so the question is, do you want your app to be OK for now, or to make it a bit future-proof? It's up to you!
来源：https://stackoverflow.com/questions/39787180/migrate-to-bootstrap-4-from-bootstrap-3