Background A project of mine needs to embed a web app in mobile apps, both Android apps and iOS apps, the detail is mobile apps providing a small web view in somewhere of the app, the web view will contain a web app, the web app will be in a small state when its first be loaded. After users clicking

Introduction indexedDB HTML5 provides serveral storage mechanisms to let web applications store their data for various purposes, indexedDB is one of the mechanism, it’s a transactional database system with the ability of storing JavaScript objects. Another important character it has is to be usedin