Readers will gain a deep understanding of what WebAssembly is, how it works under the hood, when to use it, and why it improves JavaScript run times. The book's clear prose, illustrations, and examples deconstruct complex topics for programmers of all skill levels. It shows how to expertly optimise and compile low-level code via WebAssembly and it teaches you how to debug, evaluate, and represent your code in human-readable WebAssembly Text format - a skill set that sets users apart from their peers as WebAssembly expands into mobile and desktop apps, servers and other execution environments.