This blog post and accompanying screen-cast introduce the Open XML SDK for JavaScript. Using this SDK, you can add Open XML functionality to:
JavaScript applications that run in-browser
Node.JS server-side applications
Windows 8 'Store' applications written in HTML5 and JavaScript
Word 2013 JavaScript Apps
SharePoint 2013 and SharePoint 2010 Web Parts written in JavaScript
Download: Open XML SDK for JavaScript on CodePlex
See Also: Open XML SDK for JavaScript Resource Center
(Please visit the site to view this video)
See Also: Scenarios of the Open XML SDK for JavaScript
See Also: Overview of the Open XML SDK for JavaScript API