done

src/transformStateWithClones.js

@@ -7,7 +7,36 @@
  * @return {Object[]}
  */
 function transformStateWithClones(state, actions) {
-  // write code here
+  const history = [];
+
+  function clone(source) {
+    return { ...source };
+  }
+
+  let objCopy = clone(state);
+
+  for (let i = 0; i < actions.length; i++) {
+    switch (actions[i].type) {
+      case 'addProperties':
+        for (const key in actions[i].extraData) {
+          objCopy[key] = actions[i].extraData[key];
+        }
+        history.push(clone(objCopy));
+        break;
+      case 'removeProperties':
+        for (let d = 0; d < actions[i].keysToRemove.length; d++) {
+          delete objCopy[actions[i].keysToRemove[d]];
+        }
+        history.push(clone(objCopy));
+        break;
+      case 'clear':
+        objCopy = {};
+        history.push(clone(objCopy));
+        break;
+    }
+  }
+
+  return history;
 }
 
 module.exports = transformStateWithClones;