Links:

react cheat sheet: https://devhints.io/react

https://reactjs.org/

https://facebook.github.io/create-react-app/

REACTSTRAP: https://react-bootstrap.github.io/

https://facebook.github.io/create-react-app/docs/adding-bootstrap

https://reactstrap.github.io/

BootStrap:

https://getbootstrap.com/docs/4.3/getting-started/introduction/

https://startbootstrap.com