refactor: packages/

1 files changed, 18 insertions, 0 deletions

diff --git a/packages/excalidraw/hooks/useStableCallback.ts b/packages/excalidraw/hooks/useStableCallback.ts
new file mode 100644
index 0000000..9920a73
--- /dev/null
+++ b/packages/excalidraw/hooks/useStableCallback.ts
@@ -0,0 +1,18 @@
+import { useRef } from "react";
+
+/**
+ * Returns a stable function of the same type.
+ */
+export const useStableCallback = <T extends (...args: any[]) => any>(
+  userFn: T,
+) => {
+  const stableRef = useRef<{ userFn: T; stableFn?: T }>({ userFn });
+  stableRef.current.userFn = userFn;
+
+  if (!stableRef.current.stableFn) {
+    stableRef.current.stableFn = ((...args: any[]) =>
+      stableRef.current.userFn(...args)) as T;
+  }
+
+  return stableRef.current.stableFn as T;
+};