Node.js now runs TypeScript natively by stripping types, eliminating build steps

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Recent stable Node.js versions can directly execute TypeScript files without transpilation. The feature works by stripping type annotations, interfaces, and type aliases using a built-in module called amaro. This process does not perform type checking or read tsconfig.json settings, leaving type safety to editors and CI tools. Some TypeScript constructs like enums and parameter properties remain unsupported and will cause runtime errors. Developers must use erasable syntax or third-party tools for full TypeScript semantics.

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