babel-plugin-jsdoc-to-assert

A Babel plugin that converts JSDoc type annotations (@param and @type) into runtime assertion statements (console.assert) for testing. Version 4.0.0 is the current stable release, requiring Babel 7+. The plugin transforms static type documentation into executable checks, enabling runtime verification without a separate type system. Unlike TypeScript or Flow, it operates at the AST level during Babel transpilation and supports generic arrays (e.g., number[]) and rest parameters. Its primary differentiator is seamless integration into Babel workflows for development-only assertions, with options to enable/disable @param and @type checking. The package is maintained by azu and has a preset version (babel-preset-jsdoc-to-assert). Releases are infrequent, focusing on compatibility and bug fixes.