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That's not what this is about though, it's for UI layout (much like with Dashboard). You don't call Objective-C APIs from JS inside a WebKit container, you're actually using JS to layout the app.

Update: the docs are up and the JS framework is called TVJS, https://developer.apple.com/library/prerelease/tvos/document...

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JavaScriptCore framework gives full access to JS runtime.https://www.bignerdranch.com/blog/javascriptcore-and-ios-7/

The docs say you use something called "TVML" to lay out the UI, and inside the TVML you can have JS. I think.

TVML for layout and TVJS for logic. TVML is just an XML schema for Apple TV UIs and TVJS a Javascript framework to present the XML templates loaded with your data.

If you're wanting to stream video you can build a full app with almost no Obj-C/Swift (there's still a small shell, though probably nothing custom needs to be here).

The XML templates are a little odd in that they're JS files (e.g. Index.xml.js) and contain the XML as the return value of a global function called Template.

It seems really straight forward though.

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