Intl.supportedValuesOf('currency') includes several codes for
currencies that have actually been withdrawn/superseded — unlike
JVM/Android/Apple, which derive "currently used" from each ISO
country's live-assigned currency (java.util.Currency/NSLocale), the
web platform has no equivalent API, so this app was showing them
unfiltered.
Confirmed exactly which codes by diffing the web list against the
JVM's own live-derived set: ANG, CUC, HRK, SLL, and ZWL are genuinely
withdrawn/superseded national currencies, now excluded via a manually
maintained list (the web platform's only option here). XDR and XSU
were also missing from the JVM's set, but only because they aren't
tied to any ISO country — not because they're withdrawn — so those
stay, same reasoning this codebase already applies to precious
metals.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FXcrACM5sok3M1KQJ8kByy
tyiuandClaude Sonnet 5
e03e742b50