JavaScript Power Drills

by Laurence Lars Svekis

JavaScript Power Drills: 100 Exercises for Coders is your hands-on guide to mastering JavaScript through real, practical coding challenges. Whether you're a self-taught learner, a computer science student, or a professional developer looking to sharpen your problem-solving skills, this book provides a complete toolkit for turning JavaScript knowledge into confidence and fluency.Inside, you'll find 100 exercises that cover the entire spectrum of modern JavaScript, from the absolute fundamentals to more advanced, real-world concepts. Each drill is designed to help you move beyond passive reading and engage in the kind of practice that leads to true mastery. The book's progressive structure makes it ideal for both step-by-step learners and those who prefer to jump directly to the concepts they most want to improve.What makes this book different?Comprehensive Coverage: Start with variables, data types, and basic syntax, and advance through arrays, objects, functions, loops, higher-order functions, closures, asynchronous programming, and more. Every exercise targets a specific skill you'll use in real development.Step-by-Step Guidance: Every exercise includes a clear problem statement, step-by-step solution, code sample, and an explanation of why the solution works. This scaffolding ensures that you not only solve problems, but truly understand how and why they work.Real-World Scenarios: Drills are inspired by the types of problems you'll face in interviews, coding bootcamps, and on-the-job challenges. The focus is on practical, reusable knowledge-not trivia.Modern JavaScript: Embraces ES6+ syntax and best practices, including arrow functions, destructuring, spread/rest operators, classes, Promises, and async/await.Modular, Flexible Format: Work through the book front to back, or pick exercises at random to target your weak spots. Use it for daily practice, technical interviews, classroom teaching, or coding bootcamp prep.Community and Source Code: Access all exercises, solutions, and more bonus content online at and the GitHub repo Who is this book for?Self-learners and beginners ready to make the leap from reading to building.Bootcamp students and recent grads seeking practical skill reinforcement.Junior and intermediate developers looking to solidify their JavaScript foundation.Teachers and mentors in search of reliable exercises for lessons or workshops.Anyone preparing for technical interviews or coding challenges.Topics include: Variables, data types, and operatorsString and array manipulationFunctions, scope, and closuresObject-oriented programming (OOP)Functional programming techniquesDOM basics (for context, not full web projects)Callbacks, Promises, async/await, and error handlingProblem-solving strategies and best practicesWith clear explanations, sample solutions, and a focus on building real-world skills, JavaScript Power Drills will help you break through plateaus, conquer your coding doubts, and become the JavaScript developer you aspire to be.