twoslash is a versatile TypeScript and JavaScript code sample processor. It empowers developers to create live, interactive code demonstrations directly within documentation and websites. By analyzing code snippets with TypeScript's language service, twoslash visualizes type information, error messages, and completion lists. It's ideal for tutorials, API references, and educational content, enhancing user understanding and engagement. It streamlines the process of creating compelling and informative code examples, significantly improving the developer experience.