Welcome to the crash course on reactJS. Here is the link for exercise files, final project, and discussion section for this course: https://courses.learncodeonline.in/le... ReactJS is an amazing and very popular library by Facebook and is open source. React is small and can be used with various tech stack like Node stack, Django Stack and more. React includes very few concepts like state, props, components and is very quick to learn as compared to other frameworks.