Steps to Reproduce

Set property org.zkoss.web.classWebResource.cache.etag to true in zk.xml.

Load application in browser.

Open developer tools window in browser on tab Network.

Current Result

Look that ETag is present in Response headers but there is no header If-None-Match in Request headers.

Expected Result

I expect that header If-None-Match will be present in Request headers. I want to control application resources browser cached policy by this way. In particular I want that my application zk.pwd file with custom component's javascript will be reloaded by browser when I change one of custom component's javascript.

Debug Information

Workaround