node-gettext

import Gettext from 'node-gettext'; // Example Swedish translation data in the format expected by node-gettext. // This would typically be loaded from a .json, .mo, or .po file processed by gettext-parser. const swedishTranslations = { charset: 'UTF-8', headers: { 'plural-forms': 'nplurals=2; plural=(n != 1);', 'content-type': 'text/plain; charset=UTF-8' }, translations: { messages: { 'The world is a funny place': { msgid: 'The world is a funny place', msgstr: ['Världen är en underlig plats'] }, 'Hello, %s!': { msgid: 'Hello, %s!', msgstr: ['Hallå, %s!'] }, 'One apple': { msgid: 'One apple', msgid_plural: '%d apples', msgstr: ['Ett äpple', '%d äpplen'] } } } }; const gt = new Gettext(); // Add the loaded translations for the 'messages' domain and 'sv-SE' locale. gt.addTranslations('sv-SE', 'messages', swedishTranslations); // Set the current locale for the Gettext instance. gt.setLocale('sv-SE'); console.log('--- Simple Translation ---'); console.log(gt.gettext('The world is a funny place')); // Expected output: "Världen är en underlig plats" console.log('\n--- Translation with Interpolation ---'); console.log(gt.gettext('Hello, %s!', 'Alex')); // Expected output: "Hallå, Alex!" console.log('\n--- Plural Form Translation (Singular) ---'); console.log(gt.ngettext('One apple', '%d apples', 1)); // Expected output: "Ett äpple" console.log('\n--- Plural Form Translation (Plural) ---'); console.log(gt.ngettext('One apple', '%d apples', 5)); // Expected output: "5 äpplen" // Example of error event handling for missing translations gt.on('error', (error) => { console.error('\nGettext Error Event:', error); }); console.log('\n--- Triggering an Error Event (missing translation) ---'); gt.gettext('This message does not exist'); // Expected output: "Gettext Error Event: This message does not exist"