4.0.0 (2020-05-23)

Features

• @formatjs/intl-numberformat: Use native Intl.getCanonicalLocales (54cea38)

This is a rewrite of Intl.NumberFormat polyfill:

• Feature compatible with ES2021 spec.
• Pass most of Intl.NumberFormat test262 cases.
• New version is 3 to 4 times faster in the benchmark of instantiating NumberFormat object + formatting numbers in currency or unit styles. It is almost 2 times faster in the benchmark variant that reuses the NumberFormat object.
• Slightly reduce locale data JSON size.
• Support compound unit like kilometer-per-second, where kilometer and second can be any simple unit whitelisted in [IsSanctionedSimpleUnitIdentifier][].
• Polyfill for NumberFormat.prototype.toLocaleString.
• Drop Unified prefix from the type definitions.
• Reorganized source module structure.

BREAKING CHANGES

• @formatjs/intl-numberformat: This requires @formatjs/intl-getcanonicallocales for
  IE11 and below