source-preview-plugin

@mdxeditor/source-preview-plugin

MDXEditor plugin for displaying source code editor alongside a rich-text preview in a side-by-side view. Allows seamless switching between rich-text editing and viewing/editing the raw markdown source.

Installation

npm install @mdxeditor/source-preview-plugin

pnpm add @mdxeditor/source-preview-plugin

Features

• Side-by-side source and preview display
• Seamless switching between rich-text and source modes
• Bring your own source editor (supports Monaco, CodeMirror, or any custom editor)
• Built with gurx reactive state management
• TypeScript support with full type definitions

Usage

This plugin wraps the MDXEditor with a source code editor that can be toggled alongside the rich-text WYSIWYG editor.

Basic Example with Textarea

import { MDXEditor } from "@mdxeditor/editor";
import { sourceWithPreviewPlugin } from "@mdxeditor/source-preview-plugin";
import type { SourceEditor } from "@mdxeditor/source-preview-plugin";

// Define your source editor component
const MySourceEditor: SourceEditor = ({ markdown, onChange }) => {
  return (
    <textarea
      value={markdown}
      onChange={(e) => onChange(e.target.value)}
      style={{ width: "100%", height: "100%", fontFamily: "monospace" }}
    />
  );
};

function App() {
  return (
    <MDXEditor
      markdown="# Hello World"
      plugins={[
        sourceWithPreviewPlugin({
          viewMode: "rich-text", // or 'source'
          editor: MySourceEditor,
        }),
      ]}
    />
  );
}

Advanced Example with Monaco Editor

import { MDXEditor } from "@mdxeditor/editor";
import { sourceWithPreviewPlugin } from "@mdxeditor/source-preview-plugin";
import type { SourceEditor } from "@mdxeditor/source-preview-plugin";
import Editor from "@monaco-editor/react";

const MonacoSourceEditor: SourceEditor = ({ markdown, onChange }) => {
  return (
    <Editor
      height="100%"
      defaultLanguage="markdown"
      value={markdown}
      onChange={(value) => onChange(value || "")}
      options={{
        minimap: { enabled: false },
        lineNumbers: "on",
        wordWrap: "on",
      }}
    />
  );
};

function App() {
  return (
    <MDXEditor
      markdown="# Hello World"
      plugins={[
        sourceWithPreviewPlugin({
          viewMode: "source",
          editor: MonacoSourceEditor,
        }),
      ]}
    />
  );
}

API

Plugin Configuration

The plugin accepts the following options:

• editor (required): A React component that implements the SourceEditor interface for editing markdown source
• viewMode (optional): Initial view mode, either 'rich-text' or 'source'. Default: 'rich-text'

SourceEditor Interface

Your source editor component should match this interface:

interface SourceEditorProps {
  markdown: string;
  onChange: (markdown: string) => void;
}

type SourceEditor = React.ComponentType<SourceEditorProps>;

The component receives:

• markdown: The current markdown content as a string
• onChange: Callback to update the markdown content

How It Works

The plugin uses gurx for reactive state management:

• viewMode$: Controls whether the editor is in 'rich-text' or 'source' mode
• sourceEditor$: Stores the source editor component
• updateBothSourceAndMarkdown$: Signal that syncs source and preview

When in source mode, the rich-text editor becomes read-only, and changes made in the source editor are synchronized back to the preview.

Peer Dependencies

This plugin requires:

• react ^18.0.0 || ^19.0.0
• react-dom ^18.0.0 || ^19.0.0

Contributing

This package is part of the MDXEditor Extras monorepo. See the main repository for contribution guidelines.

License

MIT