A Guide to Precise Age Calculation in React

Have you ever visited a site that told you your exact age in days, months and years?, most likely not (lol), so I will introduce you to one today thanks to this project from Front End Mentor. I'll be explaining the underlying logic behind calculating a person's age in days, months and years using React and a date library that makes it easy to work with dates. Here's a live preview of the project: Link. I assume you already have knowledge of React (basic understanding is fine), so I will skip over installation and setting up a React project. The Core Idea Calculating a person's age means finding the difference between two dates: The person's birth date and today’s date, but because months have different lengths (and leap years exist), it’s not as simple as subtracting years directly. If you have ever worked with dates before, you know how stressful they can be. I personally hate working with dates 😅, as they get complicated and confusing quickly. Due to the difficulty involved in using