In this book, you will learn design patterns, performance and rendering patterns for building high-quality web applications using modern javascript and React. Patterns are time-tested templates for writing code. They can be really powerful, whether you're a seasoned developer or beginner, bringing a valuable level of resilience and flexibility to your codebase. Whether it's better user-experience, developer-experience or just smarter architecture, the patterns in “Learning Patterns” can be a valuable consideration for any modern web application. Design patterns are a fundamental part of software development, as they provide typical solutions to commonly recurring problems in software design. Rather than providing specific pieces of software, design patterns are merely concepts that can be used to handle recurring themes in an optimized way. Over the past couple of years, the web development ecosystem has changed rapidly. Whereas some well-known design patterns may simply not be as valuable as they used to be, others have evolved to solve modern problems with the latest technologies.