Extensible Code Editor

CodeMirror 6 is an in-progress rewrite of the CodeMirror code editor. The new system aims to provide solid accessibility, touchscreen support, better content analysis, and a modern programming interface, while matching the existing code in features and performance. It will not be API-compatible with the old code.

The project is at a point where the core code is in good shape, but the documentation is incomplete and several essential extensions have not been implemented yet.

Features

• Full Parsing

  The recommended way to write language integration for CodeMirror 6 involves a full parse tree, which makes code analysis easier and more powerful.

• Accessible

  This version leaves more to the browser, instead of “faking” the editing process in JavaScript. This makes it more transparent to screen readers and other accessibility tools.

• Touchscreen Support

  Using a native editable control allows you to use the editor on a phone or tablet with the platform's native selection and editing behavior.

• Extensible

  A more structured extension interface allows you to implement complicated extensions in a robust way, without the race conditions and complexity they would involve in the old system.

• Modular

  The system's core is extremely generic, and even basic features like syntax highlighting and line number gutters are implemented as extensions, allowing you to omit or replace them if you need to.

• Fast

  By carefully doing only the work that needs to be done, the library manages to be fast even with gigantic documents and ridiculously long lines.

About

CodeMirror is open source (MIT or GPL3). It is being developed on GitHub. Contributions are welcome.

Discussing the project, or asking questions, is best done on the forum. Bugs should be reported through the issue tracker. We aim to be an inclusive, welcoming community. To make that explicit, we have a code of conduct that applies to communication around the project.

Sponsors

These wonderful companies and organizations helped fund the work on CodeMirror 6.

Diamond

Gold

Silver

Bronze

Andrew Lee