This is a barebones demo of presence not working in supabase-js 2.56 when imported from https://cdn.jsdelivr.net/npm/@supabase/supabase-js@2.56/+esm'
Open test2-256.html in a new tab and check the console for both this tab and the new one.
There will be no console log acknowledging each other's presence, only the basic initialisation logs.
Open test1-253.html and test2-253.html in a separate tab.
There is now console logs acknowledging each other's presence.
The working 2.53 pages are 100% identical to these other than the version of supabase-js imported and this accompanying text.