Bootstrap is still going strong. And have you checked ReactStrap?

The VDOM craze may have you think that Bootstrap is dead. It isn’t. It’s as powerful as ever that the first-class citizenship of Popper.js and an ever evolving jQuery still make it the grandmaster of go-to toolkits for getting good Web-UIs done quickly. It also works very neatly together with virtual DOM libraries such as React. Check out ReactStrap to see how it’s done.