VisualEditor provides a rich-text editor for HTML documents. It is written in JavaScript and runs in a web browser.
For more information about the project, check out the VisualEditor page on mediawiki.org.
For information on setting up VisualEditor, please see https://www.mediawiki.org/wiki/VisualEditor/Setup
For information about running tests and contributing code to VisualEditor, see CONTRIBUTING.md. Patch submissions are reviewed and managed with Gerrit. There is also API documentation available for the VisualEditor.