How does MobX ensure that reactions run only when necessary?
- By constantly checking all observable values.
- By using polling mechanisms.
- Reactions always run, so this is not a concern.
- Through batched updates.
MobX ensures that reactions run only when necessary by using batched updates. Instead of immediately running a reaction every time an observable changes, MobX collects multiple changes and then executes reactions in a batch. This batching minimizes the number of times reactions run and optimizes performance by avoiding unnecessary re-renders or computations.
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