(This is a pull request pending further discussion in the Web Perf WG and the authoring of suitable web platform tests.)
Expose information about how a resource was delivered. For example, resources which were delivered from the cache (currently exposed through transferSize) and navigations which were prefetched by the previous page are useful to identify.
This provides a way for navigational prefetch to be detected by authors, and additionally provides a more natural way to mark resources served from the HTTP cache. Potentially also useful for marking resources served from the preload (as in <link rel=preload>) cache.
Initial public proposalhttps://github.com/w3c/resource-timing/issues/332
TAG review statusPending
Interoperability and CompatibilityGecko
: No signalWebKit
: No signalWeb developers
: No signalsOther signals
WebView application risks
Does this intent deprecate or change behavior of existing APIs, such that it has potentially high risk for Android WebView-based applications?
Existing developer tools adequately cover the addition of a property.No, but WPT will be written alongside the implementation.
Not landed yet, but likely "PerformanceResourceTimingDeliveryType".
Requires code in //chrome?False
No milestones specified
Link to entry on the Chrome Platform Statushttps://chromestatus.com/feature/6347141115543552