Use it Manifest offline caching mechanism, on the server is configured with mime,
But:
On the apache server, can correct performance offline caching ability: update the manifest file browser automatically updated online after the latest web pages and resources;
The same web site code in nginx server failed to update web resources, debugging found browser requests. The manifest file also has always been old,

Guess may be nginx server configuration has a problem, but I don't know which configuration would cause this problem?