react-monaco-editor

Monaco Editor for React.

Examples

To build the examples locally, run:

npm install
cd examples && npm install
npm start

Then open http://localhost:8886 in a browser.

Installation

npm install react-monaco-editor

Usage

Using with webpack

1import React from 'react';
2import { render } from 'react-dom';
3import MonacoEditor from 'react-monaco-editor';
4
5class App extends React.Component {
6  constructor(props) {
7    super(props);
8    this.state = {
9      code: '// type your code...',
10    }
11  }
12  editorDidMount(editor, monaco) {
13    console.log('editorDidMount', editor);
14    editor.focus();
15  }
16  onChange(newValue, e) {
17    console.log('onChange', newValue, e);
18  }
19  render() {
20    const code = this.state.code;
21    const options = {
22      selectOnLineNumbers: true
23    };
24    return (
25      <MonacoEditor
26        width="800"
27        height="600"
28        language="javascript"
29        theme="vs-dark"
30        value={code}
31        options={options}
32        onChange={::this.onChange}
33        editorDidMount={::this.editorDidMount}
34      />
35    );
36  }
37}
38
39render(
40  <App />,
41  document.getElementById('root')
42);

Add a Webpack plugin copy-webpack-plugin to your webpack.config.js:

1const CopyWebpackPlugin = require('copy-webpack-plugin');
2module.exports = {
3  plugins: [
4    new CopyWebpackPlugin([
5      {
6        from: 'node_modules/monaco-editor/min/vs',
7        to: 'vs',
8      }
9    ])
10  ]
11};

Fill from field with the actual path of monaco-editor package in node_modules.

Using with require.config (do not need Webpack)

1class App extends React.Component {
2  render() {
3    const requireConfig = {
4      url: 'https://cdnjs.cloudflare.com/ajax/libs/require.js/2.3.1/require.min.js',
5      paths: {
6        'vs': 'https://www.mycdn.com/monaco-editor/0.6.1/min/vs'
7      }
8    };
9    return (
10      <MonacoEditor
11        width="800"
12        height="600"
13        language="javascript"
14        value="// type your code..."
15        requireConfig={requireConfig}
16      />
17    );
18  }
19}

requireConfig is optional, equal to:

1<script src="https://cdnjs.cloudflare.com/ajax/libs/require.js/2.3.1/require.min.js"></script>
2<script>
3    require.config({ paths: { 'vs': 'https://www.mycdn.com/monaco-editor/0.6.1/min/vs' }});
4</script>

Both them are valid ways to config loader url and relative path of module.

The default value for requriedConfig.url is vs/loader.js.

You may need to note the cross domain case.

Properties

If you specify value property, the component behaves in controlled mode. Otherwise, it behaves in uncontrolled mode.

• width width of editor. Defaults to 100%.
• height height of editor. Defaults to 100%.
• value value of the auto created model in the editor.
• defaultValue the initial value of the auto created model in the editor.
• language the initial language of the auto created model in the editor.
• theme the theme of the editor
• options refer to Monaco interface IEditorConstructionOptions.
• onChange(newValue, event) an event emitted when the content of the current model has changed.
• editorWillMount(monaco) an event emitted before the editor mounted (similar to componentWillMount of React).
• editorDidMount(editor, monaco) an event emitted when the editor has been mounted (similar to componentDidMount of React).
• requireConfig optional, allow to config loader url and relative path of module, refer to require.config.
• context optional, allow to pass a different context then the global window onto which the monaco instance will be loaded. Useful if you want to load the editor in an iframe.

Events & Methods

Refer to Monaco interface IEditor.

Q & A

How to interact with the MonacoEditor instance

Using the first parameter of editorDidMount, or using a ref (e.g. <MonacoEditor ref="monaco">) after editorDidMount event has fired.

Then you can invoke instance methods via this.refs.monaco.editor, e.g. this.refs.monaco.editor.focus() to focuses the MonacoEditor instance.

How to get value of editor

Using this.refs.monaco.editor.getValue() or via method of Model instance:

1const model = this.refs.monaco.editor.getModel();
2const value = model.getValue();

Do something before editor mounted

For example, you may want to configure some JSON schemas before editor mounted, then you can go with editorWillMount(monaco):

1class App extends React.Component {
2    editorWillMount(monaco) {
3        monaco.languages.json.jsonDefaults.setDiagnosticsOptions({
4            schemas: [{
5                uri: "http://myserver/foo-schema.json",
6                schema: {
7                    type: "object",
8                    properties: {
9                        p1: {
10                            enum: [ "v1", "v2"]
11                        },
12                        p2: {
13                            $ref: "http://myserver/bar-schema.json"
14                        }
15                    }
16                }
17            }]
18        });
19    }
20    render() {
21        return (
22          <MonacoEditor language="json" editorWillMount={this.editorWillMount} />
23        );
24    }
25}

Use multiple themes

Monaco only supports one theme.

License

MIT, see the LICENSE file for detail.