I feel like a good way to improve this article would have been linking to the MDN documentation for each method. Also, in the first method you discuss, normalize, you do not explain the parameters at all. Explaining why you pass 'NFC' and what the other acceptable forms are and the differences between them would've been good.
All in all though it is a good article and I am impressed at how fast you are churning them out since I started following you. Very productive!
Thanks. That's not a bad idea
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