Wechat cookie and localstorage fail

Wechat cookie and localstorage fail

this is the case:
Wechat opens page a, and when page an enters, it determines whether userid exists. If not, use cookie or localstorage to store a random userid with a hyperlink in page a, like this .
this code will be called after clicking the hyperlink and going to the page benerary b to submit a form.

 window.open("","_self");
window.close();
May.10,2022
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