1. DomName('CacheStorage.has')
  2. DocsEditable()
  3. Experimental()
Future has(String cacheName)

Source 

@DomName('CacheStorage.has')
@DocsEditable()
@Experimental() // untriaged
Future has(String cacheName) => wrap_jso(_blink.BlinkCacheStorage.instance.has_Callback_1_(unwrap_jso(this), cacheName));