We received great feedback and insight from our WinJS 4.0-Preview, released earlier this year. Now, the time has finally arrived. With the release of Windows 10, we are proud to announce WinJS 4.0! WinJS 4.0 supports the latest versions of all your favorite browsers, including the new Microsoft Edge, and wrappers for AngularJS, KnockoutJS, and ReactJS. Learn more about the new features and how to install WinJS in our latest blog post.