First non repeating character in string: spot it quickly

Looking for the easiest way to find the first non-repeating character in a string? In this video, I explain a super simple JavaScript string algorithm that helps you quickly spot the first unique character, understand how the logic works, and solve coding interview questions with confidence. We will walk through: ✔ What is a non-repeating character ✔ Why this question is popular in coding interviews ✔ The best algorithm to find unique character using a frequency map ✔ Step-by-step dry-run with the example "swiss" → w" ✔ Edge cases, time complexity, and common mistakes ✔ An easy way to spot unique character in any string This is a perfect string manipulation tutorial for beginners, students, and anyone preparing for JavaScript or frontend developer interviews. If you are learning JavaScript, DSA, or string algorithms — this video will help you understand the logic in a clean and visual way. JavaScript string interview questions JavaScript algorithm explanation String manipulation in JS Coding interview prep in JavaScript JavaScript practice questions Frontend interview preparation #JavaScript #CodingInterview #StringAlgorithm #FrontendInterview #JavaScriptTutorial