Yes, please open a github issue about this. There are some non trivial changes needed to make this possible, but this is something I would love to enable in a f

Yes, please open a github issue about this. There are some non trivial changes needed to make this possible, but this is something I would love to enable in a future version. Also, if you're minifying and gzipping your static resources (standard practice these days), then Immutable.js is a relatively fit 15KB. For comparison, lodash is 8KB and jQuery is 30KB. I definitely understand the desire to not include code that will never run (we pain to optimize this at FB), but at least it won't break the proverbial bandwidth bank.