1. ui-serif, ui-sans-serif, ui-monospace and ui-rounded values for font-family

    Allows more control when choosing system interface fonts

  2. system-ui value for font-family

    Value for `font-family` that represents the default user interface font.

  3. javascript built-in: intl: locale: numberingsystem

  4. javascript built-in: intl: locale: numberingsystems

  5. javascript built-in: intl: relativetimeformat: resolvedoptions: numberingsystem