Application Cache uncached files cannot be accessed and cannot be loaded_html5 tutorial tips

I used Application Cache to cache the page and static resources. I found that when requesting data with ajax or loading uncached resources, it could not be loaded. The error was reported as follows:

CAUTION: Provisional headers are shown,

Solution Method:

NETWORK: needs to be configured* in the manifest.appcache configuration file,

CACHE MANIFEST

# 2015-02-21 v1.0.2
/test.html
NETWORK:
*

asterisk to indicate that all other files to be cached require an Internet connection