Monaco Editor

A browser based code editor
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Monaco Editor

Versions Versions Feature Requests Bugs

The Monaco Editor is the fully featured code editor from VS Code. Check out the VS Code docs to see some of the supported features.


Try it out

Try out the editor and see various examples in our interactive playground.

The playground is the best way to learn about how to use the editor, which features is supports, to try out different versions and to create minimal reproducible examples for bug reports.


> npm install monaco-editor

You will get:

  • inside /esm: ESM version of the editor (compatible with e.g. webpack)
  • inside /dev: AMD bundled, not minified
  • inside /min: AMD bundled, and minified
  • inside /min-maps: source maps for min
  • monaco.d.ts: this specifies the API of the editor (this is what is actually versioned, everything else is considered private and might break with any release).

It is recommended to develop against the dev version, and in production to use the min version.



Create issues in this repository for anything related to the Monaco Editor. Please search for existing issues to avoid duplicates.


What is the relationship between VS Code and the Monaco Editor?

The Monaco Editor is generated straight from VS Code's sources with some shims around services the code needs to make it run in a web browser outside of its home.

What is the relationship between VS Code's version and the Monaco Editor's version?

None. The Monaco Editor is a library and it reflects directly the source code.

I've written an extension for VS Code, will it work on the Monaco Editor in a browser?


Note: If the extension is fully based on the LSP and if the language server is authored in JavaScript, then it would be possible.

Why all these web workers and why should I care?

Language services create web workers to compute heavy stuff outside of the UI thread. They cost hardly anything in terms of resource overhead and you shouldn't worry too much about them, as long as you get them to work (see above the cross-domain case).

What is this loader.js? Can I use require.js?

It is an AMD loader that we use in VS Code. Yes.

I see the warning "Could not create web worker". What should I do?

HTML5 does not allow pages loaded on file:// to create web workers. Please load the editor with a web server on http:// or https:// schemes.

Is the editor supported in mobile browsers or mobile web app frameworks?


Why doesn't the editor support TextMate grammars?

  • Please see bolinfest/monaco-tm which puts together monaco-editor, vscode-oniguruma and vscode-textmate to get TM grammar support in the editor.

Contributing / Local Development

We are welcoming contributions from the community! Please see CONTRIBUTING for details how you can contribute effectively, how you can run the editor from sources and how you can debug and fix issues.

Code of Conduct

This project has adopted the Microsoft Open Source Code of Conduct. For more information see the Code of Conduct FAQ or contact [email protected] with any additional questions or comments.


Licensed under the MIT License.

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