Langium Guides
September 23, 2026 ยท View on GitHub
The following guides are for integrating Langium into a monaco-languageclient application in the web. Specifically, these guides focus on getting the language server hooked up to provide support in the editor, as well as walking through how to setup notification & request dispatch/handling logic. If you're interested in setting up a Langium-based DSL in the web, then these are the guides for you!
These guides assume you have already read the Getting Started guide here, as well as the Langium Getting Started Guides (or equivalent understanding), starting from the introduction and into the tutorials a bit, and that you already have a working Langium language.
For a concrete, runnable example of all the concepts covered in these guides, see the MiniLogo example in this repository. It demonstrates a complete Langium DSL running in the browser with Monaco, using the langium-minilogo package.
- Running a Langium DSL in the Browser goes over how to get a Langium-based DSL working in the web with the monaco-languageclient. Effectively this goes over how to prepare & bundle a Langium-based DSL's language server, so it can be run in a web worker & connected to.
- Custom Notifications and Requests with Langium Language Servers goes over how to interface with your language server to handle and send custom notifications & requests. This is useful for doing things like generation in the web.