JavaScript Code Transformation with Babel and Abstract Syntax Trees

Every time you run a linter or compile modern JavaScript, powerful tools are analyzing your code structure under the hood. Understanding Abstract Syntax Trees (ASTs) unlocks the ability to automate code refactoring, build custom developer tooling, and enforce team-specific coding standards. This text-based course guides you from the fundamental concepts of code parsing to writing your own custom compiler plugins. By completing this course, you will transition from writing standard code to building tools that analyze and transform code automatically, giving you a deep mechanical understanding of the JavaScript ecosystem. What you'll learn: - Understand the core anatomy of Abstract Syntax Trees and how compilers parse code - Configure Babel to parse, traverse, and modify modern JavaScript syntax - Build custom ESLint rules to enforce code quality and automate error prevention - Apply AST transformations to perform safe, automated codebase-wide refactoring - Practice using modern AST explorer tools to inspect and navigate syntax nodes - Design custom Babel plugins that compile new language features down to compatible code We start with the absolute basics, defining key compilation terms and exploring how code is represented as data. From there, you will read through step-by-step implementations of code analyzers, custom rules, and source-to-source compilers. Each section includes clear explanations and code snippets to reinforce your learning. This course is designed for intermediate JavaScript developers who want to dive into tooling, compiler basics, and static analysis. No prior experience with ASTs or compiler design is required. Start reading today to master the inner workings of modern JavaScript tooling.