Deeply freeze object

source/misc.ts

@@ -0,0 +1,25 @@
+import { DeeplyReadonly } from "./types";
+
+/**
+ * Recursively freezes an object by iterating over all properties and freezing them.
+ * @param obj - The object to freeze.
+ * @returns The frozen object.
+ */
+export const deepFreeze = <T>(value: T): DeeplyReadonly<T> => {
+    if (
+        value !== null &&
+        (typeof value === 'object' || typeof value === 'function')
+    ) {
+        for (const key of Reflect.ownKeys(value)) {
+        const descriptor = Reflect.getOwnPropertyDescriptor(value, key);
+
+        if (descriptor && 'value' in descriptor) {
+            deepFreeze(descriptor.value);
+        }
+        }
+
+        Object.freeze(value);
+    }
+
+    return value;
+}