codemirror-markdown-hybrid

A CodeMirror 6 extension for hybrid markdown editing - shows rendered preview for unfocused lines and raw markdown for the line or block being edited.

Demo

Try it live: Live Demo

Install

npm install codemirror-markdown-hybrid @codemirror/state @codemirror/view

Usage

import { EditorState } from '@codemirror/state';
import { EditorView } from '@codemirror/view';
import { hybridMarkdown } from 'codemirror-markdown-hybrid';

const state = EditorState.create({
  doc: '# Hello World',
  extensions: [hybridMarkdown({ theme: 'light' })],
});

const view = new EditorView({ state, parent: document.body });

Features

• Hybrid preview - rendered markdown for unfocused lines, raw editing for current line
• Collapsible headings - click the chevron to collapse/expand sections
• Light and dark themes with dynamic switching
• Keyboard shortcuts (Ctrl+B, Ctrl+I, Ctrl+K, etc.)
• Syntax highlighted code blocks
• Tables, task lists, math (KaTeX), mermaid diagrams, and more

API

hybridMarkdown(options?)

Main extension function. Returns an array of CodeMirror extensions.

Option	Type	Default	Description
theme	'light' | 'dark'	'light'	Initial theme
enablePreview	boolean	true	Enable hybrid preview
enableKeymap	boolean	true	Enable markdown shortcuts
enableCollapse	boolean	true	Enable collapsible headings

Theme & Mode Functions

• toggleTheme(view) - Toggle between light/dark themes, returns true if now dark
• toggleHybridMode(view) - Toggle between hybrid/raw mode, returns true if hybrid
• setTheme(view, theme) - Set theme explicitly ('light' or 'dark')
• setMode(view, mode) - Set mode explicitly ('hybrid' or 'raw')

Actions

The actions export provides formatting functions for building custom toolbars:

import { actions } from 'codemirror-markdown-hybrid';

// Available actions: bold, italic, strikethrough, h1, h2, h3,
// link, image, bulletList, numberedList, taskList, inlineCode,
// codeBlock, hr, quote, table, diagram, emoji
actions.bold(view);

License

MIT