Let’s look into the Fundamental concepts of React Js for beginners by Lia Infraservices – The top Mobile App Development Company in Chennai. React is a front-end open source JavaScript library for creating user interfaces (UI) components. Complex user interfaces are broken down into small “components,” which are separate pieces of “reusable codes”. The components are self-contained and reusable. They can be “JavaScript functions” or “JavaScript classes”. Class components provide certain key func