object that specifies the time when resources stored in the cache must be revalidated 對(duì)象,它指定必須重新驗(yàn)證緩存中存儲(chǔ)的資源的時(shí)間。
if the cached copy of the resource is older than the specified time value, the resource must be revalidated 如果資源的緩存副本早于指定的時(shí)間值,則必須重新驗(yàn)證資源。
the cache synchronization date allows you to specify an absolute date when cached contents must be revalidated 緩存同步日期允許您指定必須重新驗(yàn)證緩存內(nèi)容的絕對(duì)日期。
if the cache entry was last revalidated prior to the cache synchronization date, revalidation with the server occurs 如果緩存項(xiàng)的上次重新驗(yàn)證日期比緩存同步日期早,則發(fā)生服務(wù)器重新驗(yàn)證。
if a fresh cache entry was last revalidated prior to the cache synchronization date, revalidation with the server still occurs 如果某一新緩存項(xiàng)的上次重新驗(yàn)證是在緩存同步日期之前進(jìn)行的,那么仍會(huì)通過服務(wù)器進(jìn)行重新驗(yàn)證。