What are MobX reactions?

The MobX triad is completed when we add Reactions into the mix. Having reactions is what triggers the reactivity in the system. A reaction implicitly tracks all the observables which are being used and then re-executes its logic whenever the depending observables change .

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What is MobX observer?

The observer HoC automatically subscribes React components to any observables that are used during rendering. As a result, components will automatically re-render when relevant observables change. It also makes sure that components don’t re-render when there are no relevant changes.

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