Regarding javascript interop and immuatable.js, it seems that the authors of immuatable.js are trying to have their List/Map/Set objects as close to ES2015 ones

Regarding javascript interop and immuatable.js, it seems that the authors of immuatable.js are trying to have their List/Map/Set objects as close to ES2015 ones as possible [1]. [1]: https://github.com/facebook/immutable-js#javascript-first-api https://github.com/facebook/immutable-js#javascript-first-ap...