fix: Ensure referential stability for values #617
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So that internal refs can be synced together without calling the serializer on each reception site.
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🎉 This PR is included in version 1.19.0-beta.1 🎉 The release is available on: Your semantic-release bot 📦🚀 |
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🎉 This PR is included in version 1.19.0 🎉 The release is available on: Your semantic-release bot 📦🚀 |
This was referenced Sep 2, 2024
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Before this PR, any update of a search param (via nuqs or otherwise) would trigger all the parsers to run, causing unstable references for non-primitive states (objects, arrays, maybe even Dates?).
This caused effects to re-run needlessly, and it is wasteful: we already have the values, and other search params which haven't changed don't need to be parsed again.
This PR implements a cache of the serialized query string value along with the cache of the internal state (using React refs), and checks for a change before calling the parsers if needed.
Related tweet: https://x.com/fortysevenfx/status/1828786748354408489
Caveats
This is an edge case, but having two different parsers on the same key (eg:
parseAsIntegerandparseAsFloat) will result in the latest updated value being propagated to all the hooks registered on the same key.Example: if setting
footo 1.234 via parseAsFloat, a hook listening tofoowithparseAsIntegerwill have a state of 1.234, not 1. Before this PR, the state would flash first with 1.234, then the parser would run and correct it to 1.Anyway, this is not a recommended use of the library (one key, one parser, then derive state if needed).