| # y18n | |
| [![NPM version][npm-image]][npm-url] | |
| [![js-standard-style][standard-image]][standard-url] | |
| [](https://conventionalcommits.org) | |
| The bare-bones internationalization library used by yargs. | |
| Inspired by [i18n](https://www.npmjs.com/package/i18n). | |
| ## Examples | |
| _simple string translation:_ | |
| ```js | |
| const __ = require('y18n')().__; | |
| console.log(__('my awesome string %s', 'foo')); | |
| ``` | |
| output: | |
| `my awesome string foo` | |
| _using tagged template literals_ | |
| ```js | |
| const __ = require('y18n')().__; | |
| const str = 'foo'; | |
| console.log(__`my awesome string ${str}`); | |
| ``` | |
| output: | |
| `my awesome string foo` | |
| _pluralization support:_ | |
| ```js | |
| const __n = require('y18n')().__n; | |
| console.log(__n('one fish %s', '%d fishes %s', 2, 'foo')); | |
| ``` | |
| output: | |
| `2 fishes foo` | |
| ## Deno Example | |
| As of `v5` `y18n` supports [Deno](https://github.com/denoland/deno): | |
| ```typescript | |
| import y18n from "https://deno.land/x/y18n/deno.ts"; | |
| const __ = y18n({ | |
| locale: 'pirate', | |
| directory: './test/locales' | |
| }).__ | |
| console.info(__`Hi, ${'Ben'} ${'Coe'}!`) | |
| ``` | |
| You will need to run with `--allow-read` to load alternative locales. | |
| ## JSON Language Files | |
| The JSON language files should be stored in a `./locales` folder. | |
| File names correspond to locales, e.g., `en.json`, `pirate.json`. | |
| When strings are observed for the first time they will be | |
| added to the JSON file corresponding to the current locale. | |
| ## Methods | |
| ### require('y18n')(config) | |
| Create an instance of y18n with the config provided, options include: | |
| * `directory`: the locale directory, default `./locales`. | |
| * `updateFiles`: should newly observed strings be updated in file, default `true`. | |
| * `locale`: what locale should be used. | |
| * `fallbackToLanguage`: should fallback to a language-only file (e.g. `en.json`) | |
| be allowed if a file matching the locale does not exist (e.g. `en_US.json`), | |
| default `true`. | |
| ### y18n.\_\_(str, arg, arg, arg) | |
| Print a localized string, `%s` will be replaced with `arg`s. | |
| This function can also be used as a tag for a template literal. You can use it | |
| like this: <code>__`hello ${'world'}`</code>. This will be equivalent to | |
| `__('hello %s', 'world')`. | |
| ### y18n.\_\_n(singularString, pluralString, count, arg, arg, arg) | |
| Print a localized string with appropriate pluralization. If `%d` is provided | |
| in the string, the `count` will replace this placeholder. | |
| ### y18n.setLocale(str) | |
| Set the current locale being used. | |
| ### y18n.getLocale() | |
| What locale is currently being used? | |
| ### y18n.updateLocale(obj) | |
| Update the current locale with the key value pairs in `obj`. | |
| ## Supported Node.js Versions | |
| Libraries in this ecosystem make a best effort to track | |
| [Node.js' release schedule](https://nodejs.org/en/about/releases/). Here's [a | |
| post on why we think this is important](https://medium.com/the-node-js-collection/maintainers-should-consider-following-node-js-release-schedule-ab08ed4de71a). | |
| ## License | |
| ISC | |
| [npm-url]: https://npmjs.org/package/y18n | |
| [npm-image]: https://img.shields.io/npm/v/y18n.svg | |
| [standard-image]: https://img.shields.io/badge/code%20style-standard-brightgreen.svg | |
| [standard-url]: https://github.com/feross/standard | |