Why Build One? Whether you are building a modern CMS, an in-browser markdown editor, or a custom blogging platform, real-time text analysis is a fundamental utility. While a basic word count might seem simple at first glance, accurately handling edge cases such as non-standard whitespace, multi-line line breaks, symbols, and reading time estimates requires a firm understanding of string manipulation and performance optimization in JavaScript. In this guide, we will build a performant, depen...