Merge pull request #243 from melnikov-s/use-weak-map-for-react

Author: marvinhagemeister

.changeset/breezy-ants-trade.md

@@ -0,0 +1,5 @@
+---
+"@preact/signals-react": patch
+---
+
+Replace `Map` useage with `WeakMap`

packages/react/src/index.ts

@@ -24,7 +24,7 @@ export { signal, computed, batch, effect, Signal, type ReadonlySignal };
 const Empty = [] as const;
 const ReactElemType = Symbol.for("react.element"); // https://github.com/facebook/react/blob/346c7d4c43a0717302d446da9e7423a8e28d8996/packages/shared/ReactSymbols.js#L15
 const ReactMemoType = Symbol.for("react.memo"); // https://github.com/facebook/react/blob/346c7d4c43a0717302d446da9e7423a8e28d8996/packages/shared/ReactSymbols.js#L30
-const ProxyInstance = new Map<FunctionComponent<any>, FunctionComponent<any>>();
+const ProxyInstance = new WeakMap<FunctionComponent<any>, FunctionComponent<any>>();
 const SupportsProxy = typeof Proxy === "function";
 
 const ProxyHandlers = {