Techniques for web application updates

An apparatus, comprising:

• a web application server component operative to:
• receive an application update request for a requested web application from a service worker web application, the service worker web application executing in a web browser on a client device, the application update request comprising a cached version indicator for a cached copy of the requested web application local to the client device;
• and
• send a delta update to the service worker web application where the cached version indicator is less than a current version indicator of the requested web application on the web application server;
• and
• a web application update component operative to:
• determine whether an updated requested web application is available based on the cached version indicator received from the service worker web application;
• retrieve an archived copy of the previous version of the requested web application indicated by the cached version indicator where the cached version indicator is less than a current version indicator;
• retrieve a current copy of the current version of the requested web application where the cached version indicator is less than a current version indicator;
• and
• generate the delta update based on the archived copy and current copy where the cached version indicator is less than a current version indicator.

At least one computer-readable storage medium comprising instructions that, when executed, cause a system to:

• receive an application update request for a requested web application from a service worker web application, the service worker web application executing in a web browser on a client device, the application update request comprising a cached version indicator for a cached copy of the requested web application local to the client device;
• determine whether an updated requested web application is available based on the cached version indicator received from the service worker web application;
• retrieve an archived copy of the previous version of the requested web application indicated by the cached version indicator where the cached version indicator is less than a current version indicator;
• retrieve a current copy of the current version of the requested web application where the cached version indicator is less than a current version indicator;
• generate a delta update based on the archived copy and current copy where the cached version indicator is less than a current version indicator;
• and
• send the delta update to the service worker web application where the cached version indicator is less than a current version indicator.