solution

src/transformStateWithClones.js

@@ -7,7 +7,25 @@
  * @return {Object[]}
  */
 function transformStateWithClones(state, actions) {
-  // write code here
+  const result = [];
+
+  let transClone = structuredClone(state);
+
+  for (const action of actions) {
+    if (action.type === 'removeProperties') {
+      for (const key of action.keysToRemove) {
+        delete transClone[key];
+      }
+    } else if (action.type === 'addProperties') {
+      transClone = { ...transClone, ...action.extraData };
+    } else if (action.type === 'clear') {
+      transClone = {};
+    }
+
+    result.push(structuredClone(transClone));
+  }
+
+  return result;
 }
 
 module.exports = transformStateWithClones;