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[@xstate/store] Add store.transition(…) API #5215

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Added store.transition(state, event) method which is a pure function that returns the next state and effects for a given state and event as a tuple, without actually updating the store. This is useful for computing state changes before committing them, or controlling the execution of effects.

Example:

const [nextState, effects] = store.transition(store.getSnapshot(), {
  type: 'increment',
  by: 1
});

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changeset-bot bot commented Feb 26, 2025

🦋 Changeset detected

Latest commit: 6bf0b1e

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package
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@xstate/store Minor

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@davidkpiano davidkpiano requested a review from Andarist March 10, 2025 23:13
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