For my latest project, it made sense to use the very nice CSS in JS solution called styled-components, along with snapshot testing, which is a wa...
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I just added a note on generalizing the diving using recursion.
Potential enhancement to the dd function as well would be a graceful failure (I'm sure someone at some point would be confused as to why w is undefined in a recursive function).
Really interesting solution though, love it!
You're very right!