Babel Plugin Codegen

Babel-plugin-codegen is a build-time code generation utility for JavaScript and TypeScript projects, currently at stable version 4.1.5. It enables developers to execute synchronous Node.js code during the Babel compilation step, replacing sections of source code with the string output of that execution. Unlike `babel-plugin-preval`, which replaces values, `babel-plugin-codegen` replaces entire code blocks by transforming the generated string into an Abstract Syntax Tree (AST) node. It can be used directly as a Babel plugin or integrated via `babel-plugin-macros` for a more flexible, macro-style API, supporting template literals, special `codegen:` import comments, and `codegen.require()` calls. The package has a slow release cadence, with the last update in September 2021, suggesting a maintenance phase focusing on stability and bug fixes rather than active feature development. This tool is particularly useful for generating boilerplate, adapting to environmental configurations, or consolidating dynamic code into static bundles during the build process, reducing runtime overhead.