JavaScript Sets are Excellent!
So the obvious use case for Sets, removing duplicates! Which they do very easily and concisely. I personally like the example I created for the banner. The combination of spread ... and new Set() inside of an array literal consuming input from the function, meaning it will take in any iterable that can be spread "dedupe" it and return those values in an array! Super cool!! A lot going on in a small package.
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