Whenever a site redesign goes live I find myself having to press Shift + Refresh in order to reload the images that were cached. Is there a way to force the browsers to do this when a site redesign goes live, so that the user sees the full new site using the new CSS and images without any glitches?
I think it involves the HTTP expires header but I'm not familiar with how it works?
And is it also the best, most widely supported method out there?
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