Add useResilient

nevoland · Nov 2, 2023 · 98248bd · 98248bd
1 parent 96259f7
commit 98248bd
Showing 1 changed file with 15 additions and 0 deletions.
diff --git a/lib/hooks/useResilient.ts b/lib/hooks/useResilient.ts
@@ -0,0 +1,15 @@
+import { useRef } from "../dependencies";
+
+/**
+ * Returns the last non-undefined version of the provided `value`, or `undefined`.
+ *
+ * @param value The `value` to keep a non-undefined value of.
+ * @returns The last non-undefined version of the provided `value`, or `undefined`.
+ */
+export function useResilient<T>(value: T | undefined): T | undefined {
+  const ref = useRef(value);
+  if (value !== undefined) {
+    ref.current = value;
+  }
+  return ref.current;
+}