GFM Markdown and WYSIWYG Editor - Productive and Extensible

• Packages
• Why TOAST UI Editor?
• Features
• Examples
• Browser Support
• Pull Request Steps
• Contributing
• TOAST UI Family
• Used By
• License

TOAST UI Editor provides Markdown mode and WYSIWYG mode. Depending on the type of use you want like production of Markdown or maybe to just edit the Markdown. The TOAST UI Editor can be helpful for both the usage. It offers Markdown mode and WYSIWYG mode, which can be switched any point in time.

CommonMark + GFM Specifications

Today CommonMark is the de-facto Markdown standard. GFM (GitHub Flavored Markdown) is another popular specification based on CommonMark - maintained by GitHub, which is the Markdown mostly used. TOAST UI Editor follows both CommonMark and GFM specifications. Write documents with ease using productive tools provided by TOAST UI Editor and you can easily open the produced document wherever the specifications are supported.

• Live Preview : Edit Markdown while keeping an eye on the rendered HTML. Your edits will be applied immediately.
• Scroll Sync : Synchronous scrolling between Markdown and Preview. You don't need to scroll through each one separately.
• Syntax Highlight : You can check broken Markdown syntax immediately.

• Table : Through the context menu of the table, you can add or delete columns or rows of the table, and you can also arrange text in cells.
• Custom Block Editor : The custom block area can be edited through the internal editor.
• Copy and Paste : Paste anything from browser, screenshot, excel, powerpoint, etc.

• Toolbar : Through the toolbar, you can style or add elements to the document you are editing.

• Dark Theme : You can use the dark theme.

CommonMark and GFM are great, but we often need more abstraction. The TOAST UI Editor comes with powerful Plugins in compliance with the Markdown syntax.

Five basic plugins are provided as follows, and can be downloaded and used with npm.

• chart : A code block marked as a 'chart' will render TOAST UI Chart.
• code-syntax-highlight : Highlight the code block area corresponding to the language provided by Prism.js.
• color-syntax : Using TOAST UI ColorPicker, you can change the color of the editing text with the GUI.
• table-merged-cell : You can merge columns of the table header and body area.
• uml : A code block marked as an 'uml' will render UML diagrams.

• Viewer : Supports a mode to display only markdown data without an editing area.
• Internationalization (i18n) : Supports English, Dutch, Korean, Japanese, Chinese, Spanish, German, Russian, French, Ukrainian, Turkish, Finnish, Czech, Arabic, Polish, Galician, Swedish, Italian, Norwegian, Croatian + language and you can extend.
• Widget : This feature allows you to configure the rules that replaces the string matching to a specific RegExp with the widget node.
• Custom Block : Nodes not supported by Markdown can be defined through custom block. You can display the node what you want through writing the parsing logic with custom block.

• Basic
• Viewer
• Using All Plugins
• Creating the User's Plugin
• Customizing the Toobar Buttons
• Internationalization (i18n)

Here are more examples and play with TOAST UI Editor!

Chrome	Internet Explorer	Edge	Safari	Firefox
Yes	11+	Yes	Yes	Yes

TOAST UI products are open source, so you can create a pull request(PR) after you fix issues. Run npm scripts and develop yourself with the following process.

Fork main branch into your personal repository. Clone it to local computer. Install node modules. Before starting development, you should check to haveany errors.

$ git clone https://github.com/{your-personal-repo}/tui.editor.git
$ npm install
$ npm run test editor

TOAST UI Editor uses npm workspace, so you need to set the environment based on npm7. If subversion is used, dependencies must be installed by moving direct paths per package.

You can see your code is reflected as soon as you saving the codes by running a server. Don't miss adding test cases and then make green rights.

snowpack allows you to run a development server without bundling.

$ npm run serve editor

If testing of legacy browsers is required, the development server can still be run using a webpack.

$ npm run serve:ie editor

$ npm test editor

Before creating a PR, test and check for any errors. If there are no errors, then commit and push.

For more information, please refer to the Contributing section.

• Code of Conduct
• Contributing Guideline
• Commit Convention
• Issue Guidelines

• TOAST UI Calendar
• TOAST UI Chart
• TOAST UI Grid
• TOAST UI Image Editor
• TOAST UI Components

• TOAST Dooray! - Collaboration Service (Project, Messenger, Mail, Calendar, Drive, Wiki, Contacts)
• UNOTES - Visual Studio Code Extension

This software is licensed under the MIT © NHN.