Chrome OS 40 Beta channel updated

The newest Chrome OS 40 Beta channel release includes several new developer features to help you make richer, more compelling web content and apps, especially for mobile devices. Unless otherwise noted, changes described below apply to Chrome for Android, Windows, Mac, Linux, and Chrome OS.


Service Workers

This release adds service workers, a powerful new API that allows developers to make sites work offline by intercepting network requests to deliver programmatic or cached responses. Besides enabling a rich offline experience, developers can also use the API to achieve dramatic performance improvements by caching UI and other common resources between page loads.

This release includes two new APIs for use only within service workers. The Fetch API allows service workers to make network requests—including cross-origin—and return the responses to pages they control. The Cache API can save fetched responses and then return them directly the next time the same resource is requested, bypassing the latency-prone network and the eviction-prone HTTP cache.

See Chromium Blog for full story

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