That&#x27;s not what this is about though, it&#x27;s for UI layout (much like with Dashboard). You don&#x27;t call Objective-C APIs from JS inside a WebKit container, you&#x27;re actually using JS to layout the app.<p>Update: the docs are up and the JS framework is called TVJS, <a href="https:&#x2F;&#x2F;developer.apple.com&#x2F;library&#x2F;prerelease&#x2F;tvos&#x2F;documentation&#x2F;TVMLJS&#x2F;Reference&#x2F;TVJSFrameworkReference&#x2F;index.html" rel="nofollow">https:&#x2F;&#x2F;developer.apple.com&#x2F;library&#x2F;prerelease&#x2F;tvos&#x2F;document...</a>