Using IndexedDB with Dart

We will learn how to work with IndexedDB and JSON web services through the indexed_db_spirals project (https://github.com/dzenanr/indexed_db_spirals), which is a todo app like the ones we've built in previous chapters, but that stores its data in IndexedDB. Get a copy of the code with a git clone:https://github.com/dzenanr/indexed_db_spirals.git.

Spiral s00

In this spiral, todo tasks can be entered, and they are stored in IndexedDB; the following is a screenshot:

The Tasks screen of Spiral s00

Our model class is called Task, and lives in model.dart; with toDb and fromDb, it can transform an object to or make an object from a map:

class Task {
  String title;
  bool completed = false;
  DateTime updated = new DateTime.now();
  var key;

  Task(this.title);

  Task.fromDb(this.key, Map value):
    title = value['title'],
    updated = DateTime.parse(value['updated']),
    completed = value['completed'] == 'true' {
  }

  Map toDb() {
    return {
      'title': title...