Formatting & CLDR plural correctness
Generated from
mcp/patterns.registry.json— do not edit by hand; change the registry and runbun run patterns:build.
Index card — the docs below are the canonical explanation; deep-tier pattern pages additionally carry invariants and emulation notes.
Category: Internationalization (i18n) · Tier: light · Risk: low — presentation formatting only
Locale-explicit date, number, currency, percent, and relative-time formatting helpers built on the native Intl API, decoupled from the translation locale to avoid SSR/CSR hydration mismatches.
When to use: Use whenever displaying a date, number, currency, or relative-time value that should format per the visitor's locale.
Docs
Code
Machine-readable record: i18n-formatting in mcp/patterns.registry.json.