Source code for WinJS is available under GitHub, with the software now offered under an Apache 2.0 license. "Our intent is to make WinJS run great on modern browsers and modern devices. It's going to be a journey," said Josh Williams, Microsoft developer lead. "We're hoping that people contribute."
Microsoft this week also introduced WinJS 2.1 for Windows Phone 8.1, to extend it to Microsoft's smartphone platform. WinJS 2.1 for Windows Phone capabilities include pivot controls. "It is an essential control in Windows Phone that is used for lots of apps including mail and so forth," Gusmorino said. List view functionality is featured as well.