387 First Unique Character in a String LeetCode (Google Interview Question) JavaScript

387 First Unique Character in a String LeetCode (Google Interview Question) JavaScript https://leetcode.com/problems/first-unique-character-in-a-string/ "Given a string s, find the first non-repeating character in it and return its index. If it does not exist, return -1." Final code: https://replit.com/@devalex1/387-First-Unique-Character-in-a-String#index.js Gear I use: 1) Blue Yeti microphone - https://amzn.to/3ys9Te2 2) Logitech HD Pro Webcam C920 - https://amzn.to/3kuntZw 3) Monitor - https://amzn.to/3ynjJhe 4) Ipad - https://amzn.to/3BjoQAZ