We are exploring document editor options for angular app. We are looking for editor that supports word as well as excel editing with document upload support. Does groupdoc support Angular by default and have demo URL for angular.
Please note that GroupDocs.Editor is a UI-Agnostic, back-end API. It allows you to edit these supported documents (e.g. Excel, Word) using 3rd party front-end WYSIWYG HTML-editors without any additional applications.
We do have some open-source applications for you: