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I would recommend immer (https://github.com/mweststrate/immer) instead of ImmutableJS. You can work with regular JS objects, plus it plays much nicer with TypeScript.

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I wrote a tiny library called fn-update for this that does composable functional updates (https://github.com/benvan/fn-update).

Personally, I prefer not having to mutate data, even wrapped in a produce method

Having to specify the path using an array of strings would be an instant dealbreaker for me. It messes with all tooling and is bad for readability.

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