Chakra the javacript engine that is behind the Edge browser was released as open source with MIT license, which from now on will be called chacracore, which will be available on Github.
Chakra is not only in the browser but as the announcement says:
“Today, outside of the Microsoft Edge browser, Chakra powers Universal Windows applications across all form factors where Windows 10 is supported—whether it’s on an Xbox, a phone, or a traditional PC. It powers services such Azure DocumentDB, Cortana and Outlook.com. It is used by (and optimized for) TypeScript. And with Windows 10, we enabled Node.js to run with Chakra, to help advance the reach of Node.js ecosystem and make Node.js available on a new IoT platform: Windows 10 IoT Core.”
its use extends to the possibility of using nodejs and cloud-based services.
You can be informed by its twitter