You might have heard about TypeScript, but you might not know why it's useful, and how to make it work for you. This book is supposed to fix just that: it provides JavaScript developers with a simple, structured and pragmatic guidance towards TypeScript, and explains how to make sense of it all, step-by-step. In “TypeScript in 50 Lessons”, Stefan Baumgartner breaks down the quirks of TypeScript into short, manageable lessons—for front-end developers who know enough JavaScript to be dangerous.