In Windows 10, we have made significant advancements to the JSRT APIs, making them a true first class citizen for hosting Chakra across various application types supported on Windows 10. Developers can now utilize these APIs to host Chakra for scripting in both Classic Windows (Win32) applications and Universal Windows applications. These APIs now provide native access to the underlying Universal Windows Platform (UWP) and ECMAScript 6 support. For the curious, and as an example, the recently announced Node support based on Chakra for Windows 10 IoT devices is built using these APIs.
Read about it in detail here.