anchor.diff:  
   import 'dart:html';
   import 'dart:convert';
  +import 'package:ddays/task.dart' show Task, fromJson;
   
   final String STORAGE_KEY = 'ddays';
   
  
positive.code: 
  // restore a to localstorage, under key 'STORAGE_KEY',
  // saved List.
  List loadFromStorage() {
    tasklist = window.localStorage.containsKey(STORAGE_KEY)
        ? JSON.decode(window.localStorage[STORAGE_KEY])
        : [];
    return tasklist;
  }
  
  // delete a item from local Storage object with key 'STORAGE_KEY'.
  
negative.code:   window.localStorage[STORAGE_KEY] = JSON.encode(storedlist);
  }
  
  // edit an item in local Storage object 'STORAGE_KEY'.
  void editItemInStorage(Task task) {
    tasklist.forEach((i) {
      if (i['timestamp'] == task.timestamp) {
        i['summary'] = task.summary;
      }
    });
  }
  // delete localStorage key.
  void deleteStorage() {
    window.localStorage.clear();
  