I have not tested the package on React 15, although upon a glance it most likely would still work (e.g. doesn’t rely on breaking changes). The
topbar package itself is only 1KB minified that is not React specific. Give it a shot and see if it works.
I would have thought issues would arise trying to use Formik outside of React; it is specifically designed for React. I haven’t tested using it outside of the framework so couldn’t say where breakages would occur!
Cannot speak on behalf of the Vyper team, but the Rust Book explains the arguments against inheritance nicely. (Rust does not support inheritance, and instead adopts “Traits” for extending objects):
Inheritance has recently fallen out of favor as a programming design solution in many programming…