Why should I use Redux Toolkit instead of classic Redux?
Because RTK removes the boilerplate classic Redux was infamous for, is the official recommendation, and is far easier to maintain. Writing classic Redux by hand in a new project is a mistake.
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More FAQs in Common Redux Mistakes That Make React State Hard to Manage
Usually because you are selecting too much state. Using useSelector to select a large object when you need one field causes re-renders whenever any part changes. Select only the specific data you need.
RTK uses Immer internally, so you can write mutating-looking code like state.items.push(item) safely. But you should know this is happening. In classic Redux without Immer, mutating state directly causes bugs.
No. UI state like a modal open flag often belongs in local component state. Reserve Redux for genuinely shared, complex state. Putting everything in Redux adds unnecessary complexity.
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