We explore the concepts, features, and limitations of TypeRunner, use it to type check a simple project, and compare it to Deno and tsc.

LogRocket is a frontend monitoring platform that helps developers debug and troubleshoot issues in web applications by providing session replay, error tracking, and performance monitoring capabilities. With LogRocket, developers can gain insights into user interactions, identify bugs, and optimize application performance to deliver better user experiences. Developers can learn how to integrate LogRocket into their web applications, analyze user sessions, and diagnose frontend issues effectively.

LogRocket

TypeRunner is a high-performance TypeScript compiler that enables type checking without the need for `tsc` or a JavaScript engine. It compiles TypeScript code to bytecode and runs it in a custom virtual machine. It is portable and independent of Node.js, Deno, or a JavaScript engine. TypeRunner has a proof-of-concept status and supports only a subset of TypeScript's type system. It offers performance benefits over `tsc` and Deno, but has limitations such as lack of support for import statements and references to the Deno global namespace.

Type checking with TypeRunner

See how LogRocket's AI-powered error tracking works

Over 200k developers use LogRocket to create better digital experiences

LogRocket : Full visibility into your web and mobile apps