Note: Styles can be inline or in separate. Then either refer to the data with a blob URL or (better yet) save and then load the data using the Filesystem API. Instead, get the data using XMLHttpRequest (see Referencing external resources). If the resource is remote, you can't specify it in your HTML. It cannot be inline.Īll CSS styles, images, and fonts can be initially located either in the app's package or at a remote URL. For example, don't store passwords or credit card numbers locally.Īll JavaScript that the app executes must be in the app's package. # Security restrictionsĬhrome Apps are limited in where they can place their resources:īecause local data is visible on the user's machine and can't be securely encrypted, sensitive data must stay on the server. Make sure your app works well in both common and tricky scenarios. Save application state (both locally and remotely, when possible) so that users can pick up wherever they left off.

Assume your app can be closed at any time. An MVC framework can help you keep the UI and data separate. Separating the UI and data not only improves your app's design and eases the task of enabling offline usage, but also lets you provide other views of the user's data. You can use the Chrome Storage API, IndexedDB, or Filesystem API to save data locally. When using resources from the internet, use XMLHttpRequest to get it, and then save the data locally. Your offline-enabled app should follow these rules: Use local data whenever possible. Your app can detect changes in connectivity by listening for online and offline events.īut those abilities aren't enough to guarantee that your app will work offline.Your app can save and optionally sync small amounts of data using the Chrome Storage API.Your app's files-all of its JavaScript, CSS, and fonts, plus other resources it needs (such as images)-are already downloaded.Read on for tips on implementing your offline-enabled app. Once your app works offline, add whatever network functionality you need for your app to do more when it's online.

Read the announcement and learn more about migrating your app.īecause internet connections can be flakey or non-existent, you need to consider offline first: write your app as if it has no internet connection. Chrome browser and the Chrome Web Store will continue to support extensions. Important: Chrome will be removing support for Chrome Apps on all platforms.

Free chromebook scrabble offline