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Asked: 2026-05-13T07:04:19+00:00

I understand the basics of HTML page caching. My uncertainty relates to how caching

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I understand the basics of HTML page caching.

My uncertainty relates to how caching works on images, included external scripts, and included CSS stylesheets that the HTML page uses.

For example, let’s say I have an HTML page that is set to expire in 7 days. The page has 10 images on it, 2 included external CSS (.css) stylesheets, and 2 external included javascript (.js) files.

  1. Do all of these also expire in 7 days and follow what I implement in the HTML page?
  2. Any way to specify individually when these external items expire?

I seem to get mixed results on different browsers and/or with a reload or SHIFT+RELOAD action.

Perhaps there is an article somewhere that explains how this works (or should work)?

Thanks –

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1 Answer

  1. Editorial Team

    HTTP resources expire based on their own expiration settings. An HTML document is cached if that document is cached. An image referenced by that document is cached if that image is cached.

    See the Caching Tutorial for Web Authors and Webmasters

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