Features

Lightweight

You can start with the default small package that is about 70Kb (24Kb gzipped), including Indentation, History (Undo/Redo), and Shortcuts extensions.

Accessibility Friendly

By using a "contenteditable" element, screen readers are able to read the current and selected code for visually impaired users, which promises your site accessibility.

Modular and Extensible

The editor functionality can be extended by adding modular extensions. You can build your custom editor by picking them out or creating your own extensions.

Mobiles and IE

The UX is not perfect, but the editor works on mobile devices thanks to the "contenteditable". It also works on the IE11 with some limitations.

And more...

• Highlighting the current line
• Line numbers
• Auto closing paired characters
• Undoing and redoing code changes
• Increasing and decreasing the indent level of selected lines
• Commenting out selected lines with line or block comments by shortcuts
• Highlighting matched brackets
• Search and replace toolbar
• Finding words in match case, whole word and regexp modes
• Jump toolbar to go to the specific line
• Resizing the editor size by drag
• Custom dialog
• Custom context menus

Caveats

• The editor does not support text wrapping and code hint.
• In IE, scrolling performance is not better. I'm reluctant to improve it because I don't believe there is no programmer who edits code in IE anymore.
• The editor is not intended to run gigantic code. You will notice the input latency around 20,000 lines.

License

RyuseiCode is released under MIT license. © 2021 Naotoshi Fujita