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Chakra was a free and open-source JavaScript engine developed by Microsoft for its Microsoft Edge Legacy web browser. It is a fork of the same-named JScript engine used in Internet Explorer. Like the EdgeHTML browser engine, the declared intention was that it would reflect the "Living Web".cite-ref-2[2] The core components of Chakra were open-sourced as ChakraCore. In 2021, Microsoft terminated support for the engine, citing its transition to a Chromium based engine for Edge. Support has been transferred to the community, where it remains inactive.cite-ref-3[3]

• Standards support

• Open sourcing

• References

• External links

Chakra supports ECMAScript 5.1 with partial support for ECMAScript 2015.cite-ref-4[4]

Following an initial announcement on December 5, 2015,cite-ref-5[5]cite-ref-chakracoreopensourced-6-0[6] Microsoft open sourced the Chakra engine as ChakraCore, including all the key components of the JavaScript engine powering Microsoft Edge [Legacy] on their GitHub page under the MIT License on January 13, 2016.cite-ref-chakracoreopensourced-6-1[6]cite-ref-7[7] ChakraCore is essentially the same as the Chakra engine that powers the Microsoft Edge Legacy browser, but with platform-agnostic bindings, i.e., without the specific interfaces utilized within the Universal Windows App platform.

Microsoft has also created a project on GitHub that allows Node.js to use ChakraCore as its JavaScript engine instead of V8.cite-ref-8[8]

cite-note-11. "Releases · microsoft/ChakraCore · GitHub". GitHub ChakraCore repository. Retrieved 2021-02-28.

cite-note-22. ↑ "Targeting Edge vs. Legacy Engines in JsRT APIs". Retrieved 10 September 2015.

cite-note-33. ↑ "org/Release 1.12 plan.md at master · chakra-core/org". GitHub. Retrieved 2023-11-17.

cite-note-44. ↑ "Microsoft Edge Platform Status". Microsoft.com. Retrieved 10 September 2015.

cite-note-55. ↑ "Microsoft Edge's JavaScript engine to go open-source". Microsoft. 2015-12-05. Retrieved December 8, 2015.

cite-note-chakracoreopensourced-66. ↑ Microsoft open sources Edge web browser's JavaScript engine, plans port to Linux on zdnet.com by Steven J. Vaughan-Nichols (on January 13, 2016)

cite-note-77. ↑ ChakraCore on github.com

cite-note-88. ↑ Node.js enabled for ChakraCore on github.com

• ChakraCore on GitHub