BrowserVersionOwn?TypeAs String
Chrome94.0.4590???
Edge92.0.902ownobject[object CacheStorage]
Firefox90.0.0ownobject[object CacheStorage]
Java11.0.10???

PropertiesChromeEdgeFirefoxJava
delete 91.0.4472 92.0.902 90.0.0?
has 91.0.4472 92.0.902 90.0.0?
keys 91.0.4472 92.0.902 90.0.0?
match 91.0.4472 92.0.902 90.0.0?
open 91.0.4472 92.0.902 90.0.0?