<ul><li>The challenge is to create a function that counts the number of unique characters in a given string, while being case-sensitive.</li><li>The provided difficulty level is easy and the topic is strings.</li><li>Developers are encouraged to fork the challenge, write their solution, test it against the provided test cases, and share their approach in the comments.</li><li>This challenge is part of the Daily JavaScript Challenge series.</li></ul>

Daily JavaScript Challenge #JS-133: Count Unique Characters in a String

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