HyperMD

Breaks the Wall between writing and preview, in a Markdown Editor.

Online Demo | Examples | Documentation

中文介绍

Quickstart

// npm install --save hypermd codemirror
var HyperMD = require('hypermd')
var myTextarea = document.getElementById('input-area')
var editor = HyperMD.fromTextArea(myTextarea)

Also for RequireJS, Parcel, webpack, plain browser env. Read the Doc

Why use HyperMD?

HyperMD is a set of CodeMirror add-ons / modes / themes / commands / keymap etc.

You may use both original CodeMirror and HyperMD on the same page.

🌈 Write, and preview on the fly

Regular Markdown blocks and elements
- Strong, Emphasis, ~~Strikethrough~~, Code
- Links, Images
- Title / Quote / Code Block / List / Horizontal Rule
Markdown Extension
- Simple Table
- Footnote ¹
- TODO List (the box is clickable)
- YAML Front Matter
- $\LaTeX$ Formula, inline or block display mode ²
- Emoji: :joy: => 😂 (also support custom emoji)
And more
- HTML in Markdown -- WYSIWIG MDX is possible
- #hashtag support ³ , see demo
- Flowchart and Diagrams (mermaid or flowchart.js)

💪 Better Markdown-ing Experience

Upload Images and files via clipboard, or drag'n'drop
Alt+Click to open link / jump to footnote ¹
Hover to read footnotes
Copy and Paste, translate HTML into Markdown ⁴
Easy and ready-to-use Key-bindings (aka. KeyMap)

🎁 CodeMirror benefits

Syntax Highlight for code blocks, supports 120+ languages⁵. Mode can be loaded on-demand.
Configurable key-bindings
Diff and Merge
Themes ⁶
Almost all of CodeMirror addons!

🔨 Extensible and Customizable

Use PowerPacks to integrate 3rd-party libs and services on-the-fly
- MathJax, marked, KaTeX and more.
- Read the list
HyperMD functions are highly modulized

🎹 Tailored KeyMap "HyperMD":

Table
- Enter Create a table with | column | line |
- Enter Insert new row, or finish a table (if last row is empty)
- Tab or Shift-Tab to navigate between cells
List
- Tab or Shift-Tab to indent/unindent current list item
Formatting a nearby word (or selected text)
- Ctrl+B bold
- Ctrl+I emphasis
- Ctrl+D ~~strikethrough~~

Special Thanks

💎 Service and Resource

IcoMoon - The IconPack(Free Version) Demo Page uses IcoMoon icons. Related files are stored in demo/svgicon.	CodeCogs - An Open Source Scientific Library FoldMath uses codecogs' service as the default TeX MathRenderer. (You may load PowerPack to use other renderer, eg. KaTeX or MathJax)
SM.MS - A Free Image Hosting service Demo Page and PowerPack/insert-file-with-smms use SM.MS open API to upload user-inserted images. (If you want to integrate SM.MS service, use the PowerPack)	EmojiOne - Open emoji icons Demo Page and PowerPack/fold-emoji-with-emojione use Emoji icons provided free by EmojiOne (free license) (You may use other alternatives, eg. twemoji from twitter)
CodeMirror - In-browser code editor. RequireJS - A JavaScript AMD module loader. KaTeX - The fastest math typesetting library for the web. marked, turndown and more remarkable libs.

🌟 Sponsors

🙏 Sponsors (sorted by date)

☕Phithon ☕c*i ☕*Yuan ☕*Xiuzhang ☕*Junjie 🌟圆伞科技 ☕*Di

Contributing

HyperMD is a personal Open-Source project by laobubu. Contributions are welcomed. You may:

Fork on GitHub , create your amazing themes and add-ons.
Buy me a Coffee
Spread HyperMD to the world!

Ctrl+Click works too, but will jump to the footnote if exists. ↩ ↩²
Math block use $$ to wrap your TeX expression. ↩
Disabled by default, see doc; #use two hash symbol# if tag name contains spaces. ↩
Use Ctrl+Shift+V to paste plain text. ↩
Languages as many as CodeMirror supports. ↩
If the theme is not designed for HyperMD, some features might not be present. ↩