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Editorial Team
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Asked: 2026-05-24T06:43:59+00:00

I have an iPhone web-app, and I want to know how to force a

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I have an iPhone web-app, and I want to know how to force a cache refresh.

My cache manifest is this:

CACHE MANIFEST
index.html
file1.css
file1.js

index.html is the meat of the application, so I put that in the cache. At this point, I seem to be boned, as I can’t figure out how to get iPhone to invalidate the cache. Even going to Settings > Safari > Clear Cache doesn’t work, although I’d like to be able to control this programatically. Removing index.html from the manifest and re-adding it seems to work, but I would have to know that all my clients had a clean hit of the updated manifest.

How do I cache index.html and still have it updated when it changes?

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1 Answer

  1. Editorial Team

    Off the top of my head, any change to the manifest will do the trick – and manifests can contain comments starting with #. Just add a random comment and it’ll work.

    It’s a useful property, when I worked on an HTML5 application in a git repository I used to have the manifest automatically regenerated with a comment containing the HEAD hash after each commit so that the changes always propagate to the users.

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