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0.3.5 • Public • Published


Tool for communicationg with a TypeScript tsserver process (i.e. a node process running the JS/TS language service). Pairs responses with requests and provides hooks for listening to events. Chiefly useful for reproducibly running editor scenarios for standalone investigation.


See samples/index.js for an example of how to use the harness. It can be run with npm ci && node index.

The easiest way to figure out what the requests should contain is to look at the server log from a real editor session. In VS Code, you can access the server log by running the command TypeScript: Open TS Server Log.


To publish a new version of this package, change the version in package.json and push to main.


This project may contain trademarks or logos for projects, products, or services. Authorized use of Microsoft trademarks or logos is subject to and must follow Microsoft's Trademark & Brand Guidelines. Use of Microsoft trademarks or logos in modified versions of this project must not cause confusion or imply Microsoft sponsorship. Any use of third-party trademarks or logos are subject to those third-party's policies.

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npm i @typescript/server-harness

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  • typescript-bot
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