Learn the skills you need to build React applications quickly! This fully revised second edition introduces functional components, React hooks, static site generators, and more. The React javascript library helps developers speedily build reliable and beautiful frontends and user interfaces. Its simple architecture makes it easy to create complex web applications. React’s compartmentalized components can be quickly and easily tested in isolation and composed into a full application. This makes React a perfect choice for anything from quick prototypes to full-scale large websites. And because it's all javascript, React is instantly familiar. React is the ground-breaking tool, that web developers did not even know they needed, but can't let go of once they have tried it. This is definitely true for us authors as well as for many other enthusiastic web developers out there. React is immensely popular and for a good reason. This book is for developers comfortable building web applications with javascript.