What this book covers

Chapter 1, Scale from a JavaScript Perspective, introduces the idea of scalable JavaScript applications and what makes them different from other applications that scale.

Chapter 2, Influencers of Scale, helps us understand that the need to scale helps us design better architectures.

Chapter 3, Component Composition, explains how the patterns that form the core of our architecture serve as blueprints for assembling components.

Chapter 4, Component Communication and Responsibilities, explains how components that communicate with one another are a scaling constraint. It tells us how features are the result of component communication patterns.

Chapter 5, Addressability and Navigation, elaborates on large-scale web applications with URIs that point to resources, and how designs that scale can handle a growing number of URIs.

Chapter 6, User Preferences and Defaults, tells us why users need control over certain aspects of our software. And it also explains that scalable application components are configurable.

Chapter 7, Load Time and Responsiveness, explains how more moving parts means performance degradation across the application. This includes making trade-offs that keep our UI responsive, while adding new features.

Chapter 8, Portability and Testing, covers writing JavaScript code that's not tightly coupled with a single environment. This includes creating portable mock data and portable tests.

Chapter 9, Scaling Down, explains how removing unused or buggy components from applications is essential, if we want to scale up in other areas.

Chapter 10, Coping with Failure, explains that large-scale JavaScript architectures can't fall over as a result of a bug in one component. This includes how designing with failure in mind is the key to achieving scale in a broad number of scenarios.