Microsoft makes Chakra open source and pits it against V8, providing a drop-in alternative to V8 with Node.js. Only on Windows so far.
In a December 2015 talk at JSConf US, we announced that we would be open-sourcing the key components of the Chakra JavaScript engine that powers Microsoft Edge. Today, we are excited to share with you that we’ve just made the sources for ChakraCore available under the MIT License at the ChakraCore GitHub repository. Going forward, we’ll be developing the key components of Chakra in the open.
Read more from the source: Microsoft Edge Dev Blog