Task solution

src/transformStateWithClones.js

@@ -7,7 +7,42 @@
  * @return {Object[]}
  */
 function transformStateWithClones(state, actions) {
-  // write code here
+  const ADD_PROPS = 'addProperties';
+  const REMOVE_PROPS = 'removeProperties';
+  const CLEAR_ALL_PROPS = 'clear';
+  const ERROR_MESSAGE = 'Invalid action type';
+  const statesArray = [];
+  const stateCopy = { ...state };
+
+  for (const action of actions) {
+    const { type, extraData, keysToRemove } = action;
+
+    switch (type) {
+      case ADD_PROPS: {
+        Object.assign(stateCopy, extraData);
+        break;
+      }
+
+      case REMOVE_PROPS: {
+        for (const key of keysToRemove) {
+          delete stateCopy[key];
+        }
+        break;
+      }
+
+      case CLEAR_ALL_PROPS: {
+        for (const key of Object.keys(stateCopy)) {
+          delete stateCopy[key];
+        }
+        break;
+      }
+
+      default: throw new Error(ERROR_MESSAGE);
+    }
+    statesArray.push({ ...stateCopy });
+  }
+
+  return statesArray;
 }
 
 module.exports = transformStateWithClones;