Lightning Aura Components Developer Guide
jNote: This release is in preview. Features described here don’t become generally available until the latest general availability date that Salesforce announces for this release. Before then, and where features are noted as beta, pilot, or developer preview, we can’t guarantee general availability within any particular time frame or at all. Make your purchase decisions only on the basis of generally available products and features.
Using the AppCache
AppCache support is deprecated. Browser vendors have deprecated AppCache, so we
followed their lead. Remove the useAppcache attribute in
the <aura:application> tag of your standalone apps
(.app resources) to avoid cross-browser support issues due to
deprecation by browser vendors.
If you don’t currently set useAppcache in an <aura:application> tag, you don’t have to do anything because the default value of useAppcache is false.