Property:

org.zkoss.web.classWebResource.cache.etag

Applicable:
  • globally in zk.xml via <library-property>
  • not as <custom-attribute>

Default: false
since 5.0.1

It specifies whether to use ETag to detect and return 304 for matched resource.

If turned on, the cached resource won’t be reloaded if the user presses F5 to reload.