| # 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 |
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| 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) |
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| Set the current locale being used. |
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| ### y18n.getLocale() |
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| What locale is currently being used? |
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| ### y18n.updateLocale(obj) |
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| 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 |