i18next custom formatting function

i18next-custom-format-partial.ts

    interpolation: {
      escapeValue: false,
      format: function (value: any, format?: string, lng?: string) {
        switch (format) {
          case 'flags':
            if (
              typeof value !== 'number' ||
              value < 1 ||
              !Number.isInteger(value)
            ) {
              return value;
            }
            if (lng === 'hi') {
              return [...Array(value as number)].map((_) => '🇮🇳').join(' ');
            } else {
              return [...Array(value as number)].map((_) => '🌎').join(' ');
            }
          default:
            return value;
        }
      },
    },