[Webkit-unassigned] [Bug 245517] New: localstorage data was not deleted after 7days

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=245517

            Bug ID: 245517
           Summary: localstorage data was not  deleted after 7days
           Product: WebKit
           Version: Safari 15
          Hardware: Unspecified
                OS: iOS 15
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Website Storage
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: 360760496 at qq.com
                CC: sihui_liu at apple.com

We have a web site using a localstorage to provide offline datas to our users.
In this article https://webkit.org/blog/10218/full-third-party-cookie-blocking-and-more/'s contents [7-Day Cap on All Script-Writeable Storage], 
describes the deletion of localstorage data after seven days of inactivity with the site.
But, after we tested according to the following steps, we found that the localstorage data was not deleted.

Step1 Open our website [example.test.com] using iOS15's safari.
Step2 Click on the content in our homepage, and localstorage data will be generated in the browser at this time.(Our website does not use cookies.)
Step3 Close the site.
Step4 Revisit our site in iOS15's safari after seven days.
Step5 Confirmed through the developer mode of safari for mac, the localstorage data was not deleted.

I can't confirm if this is a bug, should you tell me the reason why localstorage is not deleted?

Hope your replay.

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