[@xstate/solid] Fix context mutation with new values nested in arrays #5100
Conversation
…tion into store - Fix statelyai#5099 Signed-off-by: Austin Golding <[email protected]>
🦋 Changeset detectedLatest commit: 3ff295d The changes in this PR will be included in the next version bump. This PR includes changesets to release 1 package
Not sure what this means? Click here to learn what changesets are. Click here if you're a maintainer who wants to add another changeset to this PR |
…tion into store - Fix statelyai#5099 Signed-off-by: Austin Golding <[email protected]>
| // Update new or now undefined indexes | ||
| if (newIndices !== 0) { | ||
| for (let newEnd = smallestSize; newEnd <= largestSize - 1; newEnd++) { | ||
| set(...path, newEnd, deepClone(next[newEnd])); |
There was a problem hiding this comment.
i thought we might only have to deep clone everything once upfront - do we deep clone objects anywhere else while performing other types of updates right now?
There was a problem hiding this comment.
Perhaps my question is - wow is this handled when a new property is being added to an object?
There was a problem hiding this comment.
From my initial testing, only inserting into an array seems to require a deep clone. With objects, we're able to diff down to primitives, but with a new index in an array, it doesn't update properly unless we insert the full value. Maybe there's a way we can modify array updates to work the same way objects are updated, but that'll take more research/testing. Moving nested objects around and into new properties works as expected.
I will dig deeper into this
There was a problem hiding this comment.
Thanks Austin. I appreciate it ❤️
Fix new array index value not being cloned before insertion into store - Fixes #5099
packages/xstate-solid/src/createImmutable.ts: Refactored theupdateStorefunction to deep clone new elements in the array, ensuring immutability.Additions to test cases:
packages/xstate-solid/test/useActor.test.tsx: Added a new test case to verify that moving objects between arrays does not mutate the context.