Just noticed that after a 2 year long development Bootstrap 4 beta finally came out in August.
In that time, we’ve broken all the things at least twenty-seven times over with nearly 5,000 commits, 650+ files changed, 67,000 lines added, and 82,000 lines deleted. We also shipped six major alpha releases, a trio of official Themes, and even a job board for good measure.
It is the most popular CSS framework that is used to design the websites.
I have played with Bootstrap 4 alpha 6 version. It is a bit tricky one because now uses flex box model instead of floats. In some alpha versions you could choose which one to use but now it is by default flex.
The good part is that now it is mobile-first. It means that you can build excellent mobile friendly websites. I really like Bootstrap.
Lets go to documentation and try it out.
Bootstrap logo source.