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SESSION_COOKIE_DOMAIN caveat documentation (#5464)

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David Lord 2024-05-25 10:27:04 -07:00 • committed by GitHub
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docs/config.rst
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@ -142,6 +142,12 @@ The following configuration values are used internally by Flask:
Default: ``None``
.. warning::
If this is changed after the browser created a cookie is created with
one setting, it may result in another being created. Browsers may send
send both in an undefined order. In that case, you may want to change
:data:`SESSION_COOKIE_NAME` as well or otherwise invalidate old sessions.
.. versionchanged:: 2.3
Not set by default, does not fall back to ``SERVER_NAME``.