monaco-editor
Advanced tools
The monaco-editor npm package provides the code editor that powers VS Code, offering rich IntelliSense, validation for a variety of languages, and advanced editing features. It can be integrated into web applications to provide a full-fledged code editing experience.
Syntax highlighting and IntelliSense
This code initializes the Monaco Editor with JavaScript syntax highlighting and IntelliSense support.
var editor = monaco.editor.create(document.getElementById('container'), {
value: 'function x() {\n console.log("Hello world!");\n}',
language: 'javascript'
});Code validation and linting
This code adds a marker to the editor model, indicating an error at the specified position with a message.
monaco.editor.setModelMarkers(editor.getModel(), 'owner', [
{ startLineNumber: 1, startColumn: 1, endLineNumber: 1, endColumn: 1, message: 'Error message', severity: monaco.MarkerSeverity.Error }
]);Custom themes
This code defines a custom theme for the editor and applies it.
monaco.editor.defineTheme('myTheme', {
base: 'vs',
inherit: true,
rules: [{ background: 'EDF9FA' }],
colors: { 'editor.foreground': '#000000' }
});
monaco.editor.setTheme('myTheme');Keybindings and editor actions
This code adds a custom action to the editor that can be triggered with a keyboard shortcut.
editor.addAction({
id: 'my-unique-id',
label: 'My Label',
keybindings: [monaco.KeyMod.CtrlCmd | monaco.KeyCode.KEY_S],
run: function(ed) {
alert('Action triggered!');
}
});Ace is a standalone code editor written in JavaScript. It is similar to monaco-editor but with a different API and less out-of-the-box language support. Ace is lightweight and can be easier to integrate into existing projects.
CodeMirror is another browser-based code editor with features like syntax highlighting, a rich API, and various language modes. It is less resource-intensive than monaco-editor and is often used in scenarios where performance is critical.
Brace is a fork of Ace that packages the editor for use with browserify, which can make it easier to use with npm and Node.js-based build systems. It offers similar functionality to Ace.
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 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:
/esm: ESM version of the editor (compatible with e.g. webpack)/dev: AMD bundled, not minified/min: AMD bundled, and minified/min-maps: source maps for minmonaco.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.
monaco.d.ts.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?
No.
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?
No.
❓ Why doesn't the editor support TextMate grammars?
monaco-editor, vscode-oniguruma and vscode-textmate to get TM grammar support in the editor.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.
This project has adopted the Microsoft Open Source Code of Conduct. For more information see the Code of Conduct FAQ or contact opencode@microsoft.com with any additional questions or comments.
Licensed under the MIT License.
[0.39.0]
Environment.createTrustedTypesPolicy to override trusted types handling.Contributions to monaco-editor:
FAQs
A browser based code editor
The npm package monaco-editor receives a total of 1,160,159 weekly downloads. As such, monaco-editor popularity was classified as popular.
We found that monaco-editor demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 7 open source maintainers collaborating on the project.
Did you know?
Socket for GitHub automatically highlights issues in each pull request and monitors the health of all your open source dependencies. Discover the contents of your packages and block harmful activity before you install or update your dependencies.
Research
Security News
A threat actor's playbook for exploiting the npm ecosystem was exposed on the dark web, detailing how to build a blockchain-powered botnet.
Security News
NVD’s backlog surpasses 20,000 CVEs as analysis slows and NIST announces new system updates to address ongoing delays.
Security News
Research
A malicious npm package disguised as a WhatsApp client is exploiting authentication flows with a remote kill switch to exfiltrate data and destroy files.