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My question about client hints

From: Eric Rescorla <ekr@rtfm.com>
Date: Tue, 20 Mar 2018 17:22:30 +0000
Message-ID: <CABcZeBPNJfs=FgNJ8s=PY_07HvZxjvFjiEBoUcrkDwx6d-2heA@mail.gmail.com>
To: HTTP Working Group <ietf-http-wg@w3.org>
At today's session I asked the following question:

Given that you can only send client hints if the site could run JS and set
a cookie, then
why can't the site just run JS on first contact, extract this data, and
store it in a cookie,
at which point it is available on all previous contacts.

As far as I can tell, the only difference here is on first contact. What am
I missing.

-Ekr
Received on Tuesday, 20 March 2018 17:23:38 UTC

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