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109 lines
2.8 KiB
Markdown
109 lines
2.8 KiB
Markdown
# y18n
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[![Build Status][travis-image]][travis-url]
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[![Coverage Status][coveralls-image]][coveralls-url]
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[![NPM version][npm-image]][npm-url]
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[![js-standard-style][standard-image]][standard-url]
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[](https://conventionalcommits.org)
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The bare-bones internationalization library used by yargs.
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Inspired by [i18n](https://www.npmjs.com/package/i18n).
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## Examples
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_simple string translation:_
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```js
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var __ = require('y18n').__
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console.log(__('my awesome string %s', 'foo'))
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```
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output:
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`my awesome string foo`
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_using tagged template literals_
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```js
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var __ = require('y18n').__
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var str = 'foo'
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console.log(__`my awesome string ${str}`)
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```
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output:
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`my awesome string foo`
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_pluralization support:_
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```js
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var __n = require('y18n').__n
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console.log(__n('one fish %s', '%d fishes %s', 2, 'foo'))
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```
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output:
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`2 fishes foo`
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## JSON Language Files
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The JSON language files should be stored in a `./locales` folder.
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File names correspond to locales, e.g., `en.json`, `pirate.json`.
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When strings are observed for the first time they will be
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added to the JSON file corresponding to the current locale.
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## Methods
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### require('y18n')(config)
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Create an instance of y18n with the config provided, options include:
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* `directory`: the locale directory, default `./locales`.
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* `updateFiles`: should newly observed strings be updated in file, default `true`.
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* `locale`: what locale should be used.
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* `fallbackToLanguage`: should fallback to a language-only file (e.g. `en.json`)
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be allowed if a file matching the locale does not exist (e.g. `en_US.json`),
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default `true`.
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### y18n.\_\_(str, arg, arg, arg)
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Print a localized string, `%s` will be replaced with `arg`s.
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This function can also be used as a tag for a template literal. You can use it
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like this: <code>__`hello ${'world'}`</code>. This will be equivalent to
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`__('hello %s', 'world')`.
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### y18n.\_\_n(singularString, pluralString, count, arg, arg, arg)
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Print a localized string with appropriate pluralization. If `%d` is provided
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in the string, the `count` will replace this placeholder.
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### 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`.
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## License
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ISC
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[travis-url]: https://travis-ci.org/yargs/y18n
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[travis-image]: https://img.shields.io/travis/yargs/y18n.svg
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[coveralls-url]: https://coveralls.io/github/yargs/y18n
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[coveralls-image]: https://img.shields.io/coveralls/yargs/y18n.svg
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[npm-url]: https://npmjs.org/package/y18n
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[npm-image]: https://img.shields.io/npm/v/y18n.svg
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[standard-image]: https://img.shields.io/badge/code%20style-standard-brightgreen.svg
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[standard-url]: https://github.com/feross/standard
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