From Fedora Project Wiki
Web Assets
Fedora 21 introduces standard directories for web assets (such as web user interface libraries) in /usr/share/web-assets, and JavaScript code in /usr/share/javascript. In future releases, web applications will be migrated to using shared components, eliminating the need for security updates to the same code in multiple packages.
The packaging efforts involved in this change are detailed at https://fedoraproject.org/wiki/Changes/Web_Assets