How does the chrome cache work with auto updating extensions?

We are developing a chrome extension t开发者_运维问答hat has auto-updating capability.

When the extension is updated automatically, does it force a refresh on the cache for the files in that extension. I.e. what does a user have to do to actually see the changes in the new extension. Is it required that they do a hard refresh to guarantee that they see the latest version of the extension?

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Never had any problems with updating, I would say it clears the cache.

Never seen any extension asking you to refresh something or re-enable itself either.