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|  | <html> | 
|  | <title>Service Workers: Understanding Cache Lifetimes</title> | 
|  | <head> | 
|  | <link rel="help" href="https://slightlyoff.github.io/ServiceWorker/spec/service_worker/#cache-lifetimes"> | 
|  | <script src="/resources/testharness.js"></script> | 
|  | <script src="/resources/testharnessreport.js"></script> | 
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|  | </head> | 
|  | <body> | 
|  |  | 
|  | <!-- | 
|  |  | 
|  | The `[Cache][1]` instances are not part of the browser's HTTP cache. The | 
|  | `[Cache][1]` objects are exactly what authors have to manage themselves. The | 
|  | `[Cache][1]` objects do not get updated unless authors explicitly request them | 
|  | to be. The `[Cache][1]` objects do not expire unless authors delete the | 
|  | entries. The `[Cache][1]` objects do not disappear just because the Service | 
|  | Worker script is updated. That is, caches are not updated automatically. | 
|  | Updates must be manually managed. This implies that authors should version | 
|  | their caches by name and make sure to use the caches only from the version of | 
|  | the ServiceWorker that can safely operate on. | 
|  |  | 
|  | [1]: #cache-interface | 
|  |  | 
|  | --> | 
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|  | <script> | 
|  | test(function() { | 
|  | // not_implemented(); | 
|  | }, "There are no tests for section Understanding Cache Lifetimes so far."); | 
|  | </script> | 
|  |  | 
|  | </body> | 
|  | </html> | 
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