i18n-possessive

Convert a noun into its possessive form in any of the supported languages, such as John to John's (English) or Bella to de Bella (French).

Given a noun {name} language support and rules are as follows:

• English: {name}’s always (the old rule about not adding ’s if the name ends in s is outdated).
• Spanish: de {name} always.
• French: de {name} or d’{name}, the latter for names beginning with a vowel.
• German: {name}s or {name}’, the latter for names ending in [sßxz].
• Japanese: {name}の always.

Examples

import { possessive } from "i18n-possessive";
 
possessive("John", "en"));     // John’s
possessive("Sebastián", "es"); // de Sebastián
possessive("Bella", "fr");     // de Bella
possessive("Adalene", "fr");   // d’Adalene
possessive("Leon", "de");      // Leons
possessive("Niklas", "de");    // Niklas’
possessive("はると", "ja");     // はるとの

Thanks to Scott from the Slack team for the guidance!