javascript - how to enable fb-login for dynamic subdomains -

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what way(rather best way) enable fb-login dynamic subdomains? suppose have domain.com , app self-serve , allow end-user create personal app(e.g. myapp.domain.com), fb-login/registration enabled.

how can have single fb-script handle scenario?
.

what problem?

if have set example.com domain in app settings, should able login everything.example.com, no matter everything is.


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