網站添加
<!DOCTYPE html>
<html manifest="sango.manifest">
伺服器的IIS的http頭添加mime映射為 .manifest <> text/cache-manifest
sango.manifest檔案如下：
第一行：
CACHE MANIFEST
CACHE:
緩衝
NETWORK:
never be cached and never be available offline
FALLBACK:
當緩衝失敗的替換檔案
手動更新緩衝：
開發人員也可以使用 window.applicationCache 的介面更新緩衝。方法是檢測 window.applicationCache.status 的值，如果是 UPDATEREADY，那麼可以調用 window.applicationCache.update() 更新緩衝。示範代碼如下。
referense:
http://html5demos.com/
http://diveintohtml5.org/offline.html
http://www.weste.net/2010/11-29/cache_manifest.html
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