I have a web page with a few resources, I would like to set the caching to save everything for an hour but revalidate that nothing has changed in the server.
I have tried this:
<meta http-equiv="Cache-Control" content="public, max-age=3600, must-revalidate" />
but the resources do not get refreshed.
and when i use the W3c Markup Validation Service - https://validator.w3.org/
it says this:
Error: Bad value Cache-control for attribute http-equiv on element meta.
From line 1, column 815; to line 1, column 897:
any suggestions?