mobx-bonsai

Version:

A fast lightweight alternative to MobX-State-Tree + Y.js two-way binding

mobx-bonsai.js.org

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TypeScript

export declare function getOrCreate<K, V, C = V>(map: Map<K, V>, key: K, create: () => C): V; export declare function getOrCreate<K extends object, V, C = V>(map: WeakMap<K, V>, key: K, create: () => C): V;