CodeMirror is a browser-based code editor and extensible text editor framework. It functions as a programmable interface for rendering code and text with support for numerous programming languages, serving as a reusable component for web-based integrated development environments.
The project provides a syntax highlighting engine that applies visual styles to text based on programming language rules. It includes a programming API and a CSS theming system to customize the editor's appearance and extend its functionality with custom behaviors.
The framework covers capabilities for embedding text editors into web applications and developing specialized editing interfaces. These capabilities include implementing code editors that support syntax highlighting and integrating professional code editing tools into larger web-based environments.