Build secure blockchain applications and decentralized projects using JavaScript. JavaScript Programming for Blockchain Development is a practical, project-based guide for readers who want to understand blockchain technology while learning how JavaScript can be used to create decentralized applications. The book begins with blockchain foundations, JavaScript essentials, Node.js setup, and the basic concepts behind distributed ledgers. Readers will explore cryptography, hashing, digital signatures, blocks, transactions, mining, proof-of-work, blockchain APIs, peer-to-peer networking, consensus algorithms, security, scaling, and deployment. Through hands-on projects, the book guides learners from simple blockchain scripts to a complete decentralized application prototype. Ideal for beginners, developers, Web3 learners, students, and programmers, this book provides a clear pathway into blockchain development using one of the world’s most popular programming languages.