CodeMirror

Verified 2026-11-04 against official landing page, documentation and MIT license. Use the published CodeMirror npm packages, not the development-script repository, to embed and configure an editor; language packages and extensions are added as needed. Framework agnostic browser component: host it inside your application and manage its lifecycle explicitly. The official GitHub codemirror/dev mirror is archived because upstream moved to https://code.haverbeke.berlin/codemirror/dev ; this is a hosting move, not evidence the editor itself is discontinued. GitHub link retained as a verified official mirror and migration pointer. Keep the current modular API distinct from the separately linked legacy Version 5. Free MIT editor source; sponsor funding is encouraged on the site but is not a required purchase. Editorial: useful for code playgrounds, query editors and technical forms; configuration and language tooling require more integration than a plain textarea. Publisher accessibility/browser-compatibility assertions were not independently tested.