??????????????????????????????????????????Щ????????????

?????????????????????????????/index.html????“applicationcache/”???棬????????index.html
????manifest????????????????
????CACHE MANIFEST-?????????г????????????????????л???
????NETWORK-?????????г????????????????????????????????
????FALLBACK-?????????г???????漲????????????????????棨????404??棩

????????????HTML5??????????????????????????????????js??????????????????￡????????????????????????ɡ?
???????????
????Application Cache????????????5M??????????????????

???????????????css????????????5M??????
????Document was loaded from Application Cache with manifest http://localhost/applicationcache/demo.appcache
????index.html:1 Application Cache Checking event
????index.html:6 GET http://localhost/applicationcache/style2.css net::ERR_FAILED
????index.html:1 Application Cache NoUpdate event
????index.html:11 GET http://localhost/applicationcache/2.jpg net::ERR_FAILED
????index.html:12 GET http://localhost/applicationcache/3.jpg net::ERR_FAILED
???????????style2??????????????????????????????
??????????A?????????????Application Cache??B?????????????????????A????????????????????????B??????е?????Ч???????
????????Application Cache???洢?????????????洢??????
?????Щ????
???????????????????θ???manifest??????????????????????????????????????δ????????????????ù?????????????????Application Cache?и????????β?????????????????β????á???????update????????window.reload?????
????window.applicationCache.addEventListener("updateready"??function(){
????window.location.reload()
????});
??????????????????????????????????????????????????е?applicationcache/??????????index.html?????????????????demo.appcache??????????????????????????????????????￡????????????manifest????????????????????????
????????????????????????????
????<html manifest="demo.appcache">
????=>
????<html manifest="demo1.appcache">
?????????????????demo.appcache????μ???????潫??????￡??????index.html???????????????????manifest?嵥
??????????????????????manifest?嵥???????a?????????common.js??b??????????common.js???????a?????o?b????manifest??????????b???????????????汾???????????????????????????????????????????????
???????
????????????????????????Application Cache?????????????????????????????棬??????????????????????????????
?????ο???http://www.w3school.com.cn/html5/html_5_app_cache.asp