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book/node_modules/y18n/README.md

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+# y18n
+
+[![NPM version][npm-image]][npm-url]
+[![js-standard-style][standard-image]][standard-url]
+[![Conventional Commits](https://img.shields.io/badge/Conventional%20Commits-1.0.0-yellow.svg)](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>__&#96;hello ${'world'}&#96;</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