Roadmap to master JavaScript: Start with basics—syntax, variables, data types, control flow, loops, functions, DOM, error handling, debugging. Move to intermediate topics—async JS, ES6+ features, objects, arrays, API handling. Advance further with JS engine, classes, inheritance, closures, event loop, memory management. Learn frameworks—React/Next.js, Angular, Node.js, Express, Redux. Strengthen problem-solving with data structures & algorithms—arrays, stacks, queues, linked lists, hash...