You can define client-side configs (import { config } from 'telefunc/client') anywhere, just make sure to do it at global client-side code that is always executed. For example /pages/+client.js if you use Vike:
// /pages/+client.js// Environment: clientimport { config } from 'telefunc/client'// Config values can be set hereconfig.someClientSideSetting = 'some-value'