Thanks to Dave Ceddia for the React.js tutorial this is based on, located here: https://daveceddia.com/react-practice-projects/
I built 2 additional components to extend it with a tap-tempo function. They are noted in Metronome.js. Just wanted to share my work so others could see what was done, and potentially provide some code review (this is my first React app).
Questions? Comments? Hatemail? https://classicwfl.com
Licensing is MIT, per my usual, but I doubt you'll really want to use this for anything special.