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A Mutative middleware for Zustand enhances the efficiency of immutable state updates.
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mutativejs/zustand-mutative
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AMutative middleware for Zustand enhances the efficiency of immutable state updates.
With the Mutative middleware, you can simplify the handling of immutable data in Zustand in a mutable way, allowing you to use immutable state more conveniently.
zustand-mutative is 2-6x faster than zustand with spread operation, more than 10x faster thanzustand/middleware/immer.Read more about the performance comparison in Mutative.
Measure(ops/sec) to update 50K arrays and 1K objects, bigger is better(view source). [Mutative v1.3.0 vs Immer v10.1.3]
Zustand with Mutative - Update big array and object x 5,236 ops/sec ±2.39% (83 runs sampled)Zustand with Immer - Update big array and object x 255 ops/sec ±0.23% (87 runs sampled)The fastest method is Zustand with Mutative - Update big array and objectIn order to use the Mutative middleware in Zustand, you will need to install Mutative and Zustand as a direct dependency.
npm install zustand-mutative zustand mutative# Or use any package manager of your choice.import{create}from'zustand';import{mutative}from'zustand-mutative';typeState={count:number;};typeActions={increment:(qty:number)=>void;decrement:(qty:number)=>void;};exportconstuseCountStore=create<State&Actions>()(mutative((set)=>({count:0,increment:(qty:number)=>set((state)=>{state.count+=qty;}),decrement:(qty:number)=>set((state)=>{state.count-=qty;}),})));
zustand-mutative is inspired byzustand/middleware/immer.
zustand-mutative isMIT licensed.
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A Mutative middleware for Zustand enhances the efficiency of immutable state updates.
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