Initial commit

node_modules/bcp-47-normalize/index.d.ts

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+export { bcp47Normalize } from "./lib/index.js";
+export type Warning = import('bcp-47').Warning;
+export type Options = import('./lib/index.js').Options;

node_modules/bcp-47-normalize/index.js

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+/**
+ * @typedef {import('bcp-47').Warning} Warning
+ * @typedef {import('./lib/index.js').Options} Options
+ */
+
+export {bcp47Normalize} from './lib/index.js'

node_modules/bcp-47-normalize/lib/fields.d.ts

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+/**
+ * @typedef {'script'|'region'|'variants'} Field
+ *
+ * @typedef AddOrRemove
+ * @property {Field} field
+ * @property {string} value
+ *
+ * @typedef Change
+ * @property {AddOrRemove} from
+ * @property {AddOrRemove} to
+ */
+/**
+ * @type {Array<Change>}
+ */
+export const fields: Array<Change>;
+export type Field = 'script' | 'region' | 'variants';
+export type AddOrRemove = {
+    field: Field;
+    value: string;
+};
+export type Change = {
+    from: AddOrRemove;
+    to: AddOrRemove;
+};

node_modules/bcp-47-normalize/lib/index.d.ts

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+/**
+ * Normalize the given BCP 47 tag according to Unicode CLDR suggestions.
+ *
+ * @param {string} tag
+ *   BCP 47 tag.
+ * @param {Options} [options]
+ *   Configuration (optional).
+ * @returns {string}
+ *   Normal, canonical, and pretty BCP 47 tag.
+ */
+export function bcp47Normalize(tag: string, options?: Options | undefined): string;
+export type Warning = import('bcp-47').Warning;
+export type Schema = import('bcp-47').Schema;
+export type Extension = import('bcp-47').Extension;
+/**
+ * Configuration (optional).
+ */
+export type Options = {
+    /**
+     * Passed to `bcp-47` as `options.forgiving`.
+     */
+    forgiving?: boolean;
+    /**
+     * Passed to `bcp-47` as `options.warning`.
+     *
+     * One additional warning is given:
+     *
+     * | code | reason                                                     |
+     * | :--- | :--------------------------------------------------------- |
+     * | 7    | Deprecated region `CURRENT`, expected one of `SUGGESTIONS` |
+     *
+     * This warning is only given if the region cannot be automatically fixed
+     * (when regions split into multiple regions).
+     */
+    warning?: Warning;
+};

node_modules/bcp-47-normalize/lib/index.js

@@ -0,0 +1,335 @@
+/**
+ * @typedef {import('bcp-47').Warning} Warning
+ * @typedef {import('bcp-47').Schema} Schema
+ * @typedef {import('bcp-47').Extension} Extension
+ *
+ * @typedef Options
+ *   Configuration (optional).
+ * @property {boolean} [forgiving]
+ *   Passed to `bcp-47` as `options.forgiving`.
+ * @property {Warning} [warning]
+ *   Passed to `bcp-47` as `options.warning`.
+ *
+ *   One additional warning is given:
+ *
+ *   | code | reason                                                     |
+ *   | :--- | :--------------------------------------------------------- |
+ *   | 7    | Deprecated region `CURRENT`, expected one of `SUGGESTIONS` |
+ *
+ *   This warning is only given if the region cannot be automatically fixed
+ *   (when regions split into multiple regions).
+ */
+
+import {parse, stringify} from 'bcp-47'
+import {extendedFilter} from 'bcp-47-match'
+import {matches} from './matches.js'
+import {fields} from './fields.js'
+import {many} from './many.js'
+import {likely} from './likely.js'
+
+const own = {}.hasOwnProperty
+
+/**
+ * @param {Schema} base
+ * @param {Partial<Schema>} changes
+ * @returns {Schema}
+ */
+function merge(base, changes) {
+  if (!base.language) base.language = changes.language
+  if (!base.script) base.script = changes.script
+  if (!base.region) base.region = changes.region
+  if (changes.variants) base.variants.push(...changes.variants)
+
+  return base
+}
+
+/**
+ * Mostly like:
+ * <https://github.com/formatjs/formatjs/blob/a15e757/packages/intl-locale/index.ts#L254>
+ * But doesn’t crash.
+ *
+ * @param {Schema} schema
+ * @returns {string}
+ */
+function addLikelySubtags(schema) {
+  const {language, script, region} = schema
+  /** @type {string|undefined} */
+  let match
+
+  if (
+    script &&
+    region &&
+    (match = likely[stringify({language, script, region})])
+  ) {
+    schema.script = undefined
+    schema.region = undefined
+  } else if (script && (match = likely[stringify({language, script})])) {
+    schema.script = undefined
+  } else if (region && (match = likely[stringify({language, region})])) {
+    schema.region = undefined
+  } else if (language && (match = likely[language])) {
+    // Empty.
+  }
+
+  if (match) {
+    schema.language = undefined
+    merge(schema, parse(match))
+  }
+
+  return stringify(schema)
+}
+
+/**
+ * @param {Schema} schema
+ */
+function removeLikelySubtags(schema) {
+  addLikelySubtags(schema)
+
+  const {language, script, region} = schema
+
+  if (!language) return schema
+
+  const maxLocale = stringify({language, script, region})
+
+  if (maxLocale === addLikelySubtags(parse(language))) {
+    schema.script = undefined
+    schema.region = undefined
+  } else if (
+    region &&
+    maxLocale === addLikelySubtags(parse(language + '-' + region))
+  ) {
+    schema.script = undefined
+  } else if (
+    script &&
+    maxLocale === addLikelySubtags(parse(language + '-' + script))
+  ) {
+    schema.region = undefined
+  }
+
+  return schema
+}
+
+/**
+ * Normalize the given BCP 47 tag according to Unicode CLDR suggestions.
+ *
+ * @param {string} tag
+ *   BCP 47 tag.
+ * @param {Options} [options]
+ *   Configuration (optional).
+ * @returns {string}
+ *   Normal, canonical, and pretty BCP 47 tag.
+ */
+export function bcp47Normalize(tag, options) {
+  const settings = options || {}
+  // 1. normalize and lowercase the tag (`sgn-be-fr` -> `sfb`).
+  const schema = parse(String(tag || '').toLowerCase(), settings)
+  const value = stringify(schema)
+
+  if (!value) {
+    return value
+  }
+
+  let index = -1
+
+  // 2. Do fancy, expensive replaces (`ha-latn-gh` -> `ha-gh`).
+  while (++index < matches.length) {
+    let from = matches[index].from
+
+    if (from.slice(0, 4) === 'und-' && schema.language) {
+      from = schema.language + from.slice(3)
+    }
+
+    if (extendedFilter(value, from).length > 0) {
+      replace(schema, from, matches[index].to)
+    }
+  }
+
+  // 3. Do basic field replaces (`en-840` -> `en-us`).
+  index = -1
+
+  while (++index < fields.length) {
+    if (remove(schema, fields[index].from.field, fields[index].from.value)) {
+      add(schema, fields[index].to.field, fields[index].to.value)
+    }
+  }
+
+  // 4. Minimize.
+  removeLikelySubtags(schema)
+
+  // 5. Sort variants, and sort extensions on singleton.
+  schema.variants.sort()
+  schema.extensions.sort(compareSingleton)
+
+  // 6. Warn if fields (currently only regions) should be updated but have
+  // multiple choices.
+  if (settings.warning) {
+    /** @type {keyof many} */
+    let key
+
+    for (key in many) {
+      if (own.call(many, key)) {
+        const map = many[key]
+        const value = schema[key]
+        if (value && own.call(map, value)) {
+          const replacements = map[value]
+          settings.warning(
+            'Deprecated ' +
+              key +
+              ' `' +
+              value +
+              '`, expected one of `' +
+              replacements.join('`, `') +
+              '`',
+            -1,
+            7
+          )
+        }
+      }
+    }
+  }
+
+  // 7. Add proper casing back.
+  // Format script (ISO 15924) as titlecase (example: `Latn`):
+  if (schema.script) {
+    schema.script =
+      schema.script.charAt(0).toUpperCase() + schema.script.slice(1)
+  }
+
+  // Format region (ISO 3166) as uppercase (note: this doesn’t affect numeric
+  // codes, which is fine):
+  if (schema.region) {
+    schema.region = schema.region.toUpperCase()
+  }
+
+  return stringify(schema)
+}
+
+/**
+ * @param {Schema} schema
+ * @param {string} from
+ * @param {string} to
+ * @returns {void}
+ */
+function replace(schema, from, to) {
+  const left = parse(from)
+  const right = parse(to)
+  /** @type {Array<string>} */
+  const removed = []
+  /** @type {string|null|undefined} */
+  const lang = left.language
+  /** @type {keyof schema} */
+  let key
+
+  // Remove values from `from`:
+  for (key in left) {
+    if (own.call(left, key)) {
+      const value = left[key]
+      if (value && remove(schema, key, value)) {
+        removed.push(key)
+      }
+    }
+  }
+
+  // Add values from `to`:
+  for (key in right) {
+    if (own.call(right, key)) {
+      const value = right[key]
+      // Only add values that are defined on `to`, and that were either removed by
+      // `from` or are currently empty.
+      if (lang && value && (removed.includes(key) || !schema[key])) {
+        add(schema, key, key === 'language' && value === 'und' ? lang : value)
+      }
+    }
+  }
+}
+
+/**
+ * @param {Schema} object
+ * @param {keyof Schema} key
+ * @param {string|Array<string>|Array<Extension>} value
+ * @returns {boolean}
+ */
+function remove(object, key, value) {
+  let removed = false
+  /** @type {string|Array<string>|Array<Extension>|null|undefined} */
+  let result
+
+  if (value) {
+    const current = object[key]
+    result = current
+
+    if (Array.isArray(current)) {
+      result = []
+      let index = -1
+
+      while (++index < current.length) {
+        const item = current[index]
+
+        // @ts-expect-error: TS can’t handle the two lists.
+        if (value.includes(item)) {
+          removed = true
+        } else {
+          // @ts-expect-error: TS can’t handle the two lists.
+          result.push(item)
+        }
+      }
+    } else if (current === value) {
+      result = null
+      removed = true
+    }
+
+    // @ts-expect-error: Assume the value matches.
+    object[key] = result
+  }
+
+  return removed
+}
+
+/**
+ * @param {Schema} object
+ * @param {keyof Schema} key
+ * @param {string|Array<string>|Array<Extension>} value
+ * @returns {void}
+ */
+function add(object, key, value) {
+  /** @type {string|Array<string>|Array<Extension>|null|undefined} */
+  const current = object[key]
+
+  if (Array.isArray(current)) {
+    const list = Array.isArray(value) ? value : [value]
+    /** @type {number} */
+    let index = -1
+
+    while (++index < list.length) {
+      const item = list[index]
+
+      // @ts-expect-error: TS can’t handle the two lists.
+      if (!current.includes(item)) {
+        // @ts-expect-error: TS can’t handle the two lists.
+        current.push(item)
+      }
+    }
+  } else {
+    // @ts-expect-error: Assume the value matches.
+    object[key] = value
+  }
+}
+
+/**
+ * @param {Extension} left
+ * @param {Extension} right
+ * @returns {number}
+ */
+function compareSingleton(left, right) {
+  if (left.singleton > right.singleton) {
+    return 1
+  }
+
+  if (left.singleton < right.singleton) {
+    return -1
+  }
+
+  // It is invalid to have more than one extension with the same singleton so
+  // we should never reach this code.
+  return 0
+}

node_modules/bcp-47-normalize/lib/likely.d.ts

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+/**
+ * @type {Record<string, string>}
+ */
+export const likely: Record<string, string>;

node_modules/bcp-47-normalize/lib/many.d.ts

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+/**
+ * @typedef {'script'|'region'|'variants'} Field
+ */
+/**
+ * @type {{region: Record<string, Array<string>>}}
+ */
+export const many: {
+    region: Record<string, Array<string>>;
+};
+export type Field = 'script' | 'region' | 'variants';

node_modules/bcp-47-normalize/lib/many.js

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+/**
+ * @typedef {'script'|'region'|'variants'} Field
+ */
+
+/**
+ * @type {{region: Record<string, Array<string>>}}
+ */
+export const many = {
+  region: {
+    172: [
+      'ru',
+      'am',
+      'az',
+      'by',
+      'ge',
+      'kg',
+      'kz',
+      'md',
+      'tj',
+      'tm',
+      'ua',
+      'uz'
+    ],
+    200: ['cz', 'sk'],
+    530: ['cw', 'sx', 'bq'],
+    532: ['cw', 'sx', 'bq'],
+    536: ['sa', 'iq'],
+    582: ['fm', 'mh', 'mp', 'pw'],
+    810: [
+      'ru',
+      'am',
+      'az',
+      'by',
+      'ee',
+      'ge',
+      'kz',
+      'kg',
+      'lv',
+      'lt',
+      'md',
+      'tj',
+      'tm',
+      'ua',
+      'uz'
+    ],
+    830: ['je', 'gg'],
+    890: ['rs', 'me', 'si', 'hr', 'mk', 'ba'],
+    891: ['rs', 'me'],
+    an: ['cw', 'sx', 'bq'],
+    cs: ['rs', 'me'],
+    fq: ['aq', 'tf'],
+    nt: ['sa', 'iq'],
+    pc: ['fm', 'mh', 'mp', 'pw'],
+    su: [
+      'ru',
+      'am',
+      'az',
+      'by',
+      'ee',
+      'ge',
+      'kz',
+      'kg',
+      'lv',
+      'lt',
+      'md',
+      'tj',
+      'tm',
+      'ua',
+      'uz'
+    ],
+    yu: ['rs', 'me'],
+    '062': ['034', '143'],
+    ant: ['cw', 'sx', 'bq'],
+    scg: ['rs', 'me'],
+    ntz: ['sa', 'iq'],
+    sun: [
+      'ru',
+      'am',
+      'az',
+      'by',
+      'ee',
+      'ge',
+      'kz',
+      'kg',
+      'lv',
+      'lt',
+      'md',
+      'tj',
+      'tm',
+      'ua',
+      'uz'
+    ],
+    yug: ['rs', 'me']
+  }
+}

node_modules/bcp-47-normalize/lib/matches.d.ts

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+/**
+ * @typedef Change
+ * @property {string} from
+ * @property {string} to
+ */
+/**
+ * @type {Array<Change>}
+ */
+export const matches: Array<Change>;
+export type Change = {
+    from: string;
+    to: string;
+};

node_modules/bcp-47-normalize/license

@@ -0,0 +1,22 @@
+(The MIT License)
+
+Copyright (c) 2020 Titus Wormer <tituswormer@gmail.com>
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+'Software'), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

node_modules/bcp-47-normalize/package.json

@@ -0,0 +1,91 @@
+{
+  "name": "bcp-47-normalize",
+  "version": "2.3.0",
+  "description": "Normalize, canonicalize, and format BCP 47 tags",
+  "license": "MIT",
+  "keywords": [
+    "bcp",
+    "47",
+    "bcp47",
+    "bcp-47",
+    "language",
+    "region",
+    "script",
+    "tag",
+    "subtag",
+    "format",
+    "pretty",
+    "normal",
+    "canonical"
+  ],
+  "repository": "wooorm/bcp-47-normalize",
+  "bugs": "https://github.com/wooorm/bcp-47-normalize/issues",
+  "funding": {
+    "type": "github",
+    "url": "https://github.com/sponsors/wooorm"
+  },
+  "author": "Titus Wormer <tituswormer@gmail.com> (https://wooorm.com)",
+  "contributors": [
+    "Titus Wormer <tituswormer@gmail.com> (https://wooorm.com)"
+  ],
+  "sideEffects": false,
+  "type": "module",
+  "main": "index.js",
+  "types": "index.d.ts",
+  "files": [
+    "lib/",
+    "index.d.ts",
+    "index.js"
+  ],
+  "dependencies": {
+    "bcp-47": "^2.0.0",
+    "bcp-47-match": "^2.0.0"
+  },
+  "devDependencies": {
+    "@types/node": "^20.0.0",
+    "@types/node-fetch": "^3.0.0",
+    "@types/xast": "^2.0.0",
+    "c8": "^8.0.0",
+    "cldr-core": "^43.0.0",
+    "node-fetch": "^3.0.0",
+    "prettier": "^3.0.0",
+    "remark-cli": "^11.0.0",
+    "remark-preset-wooorm": "^9.0.0",
+    "type-coverage": "^2.0.0",
+    "typescript": "^5.0.0",
+    "unist-util-visit": "^5.0.0",
+    "xast-util-from-xml": "^3.0.0",
+    "xo": "^0.55.0"
+  },
+  "scripts": {
+    "prepack": "npm run generate && npm run build && npm run format",
+    "generate": "node --conditions development build.js",
+    "build": "tsc --build --clean && tsc --build && type-coverage",
+    "format": "remark . -qfo && prettier . -w --log-level warn && xo --fix",
+    "test-api": "node --conditions development test.js",
+    "test-coverage": "c8 --check-coverage --100 --reporter lcov npm run test-api",
+    "test": "npm run generate && npm run build && npm run format && npm run test-coverage"
+  },
+  "prettier": {
+    "tabWidth": 2,
+    "useTabs": false,
+    "singleQuote": true,
+    "bracketSpacing": false,
+    "semi": false,
+    "trailingComma": "none"
+  },
+  "xo": {
+    "prettier": true
+  },
+  "remarkConfig": {
+    "plugins": [
+      "preset-wooorm"
+    ]
+  },
+  "typeCoverage": {
+    "atLeast": 100,
+    "detail": true,
+    "strict": true,
+    "ignoreCatch": true
+  }
+}

node_modules/bcp-47-normalize/readme.md

@@ -0,0 +1,207 @@
+# bcp-47-normalize
+
+[![Build][build-badge]][build]
+[![Coverage][coverage-badge]][coverage]
+[![Downloads][downloads-badge]][downloads]
+[![Size][size-badge]][size]
+
+Normalize, canonicalize, and format [BCP 47][spec] tags.
+
+## Contents
+
+*   [What is this?](#what-is-this)
+*   [When should I use this?](#when-should-i-use-this)
+*   [Install](#install)
+*   [Use](#use)
+*   [API](#api)
+    *   [`bcp47Normalize(tag[, options])`](#bcp47normalizetag-options)
+*   [Types](#types)
+*   [Compatibility](#compatibility)
+*   [Security](#security)
+*   [Related](#related)
+*   [Contribute](#contribute)
+*   [License](#license)
+
+## What is this?
+
+This package takes BCP 47 tags and makes them uniform.
+It removes unneeded info (`en-us` -> `en`) and replaces deprecated,
+overlong, and otherwise unpreferred values with preferred values
+(`en-bu` -> `en-MM`).
+It works by applying [Unicode CLDR suggestions][alias].
+
+## When should I use this?
+
+You can use this package when dealing with user-provided language tags and want
+to normalize and clean them.
+
+## Install
+
+This package is [ESM only][esm].
+In Node.js (version 14.14+, 16.0+), install with [npm][]:
+
+```sh
+npm install bcp-47-normalize
+```
+
+In Deno with [`esm.sh`][esmsh]:
+
+```js
+import {bcp47Normalize} from 'https://esm.sh/bcp-47-normalize@2'
+```
+
+In browsers with [`esm.sh`][esmsh]:
+
+```html
+<script type="module">
+  import {bcp47Normalize} from 'https://esm.sh/bcp-47-normalize@2?bundle'
+</script>
+```
+
+## Use
+
+```js
+import {bcp47Normalize} from 'bcp-47-normalize'
+
+const tags = [
+  'de-de-1901',
+  'en-gb',
+  'en-us',
+  'en-bu',
+  'hy-arevmda',
+  'nld-nl',
+  'no-nyn',
+  'pt-br',
+  'pt-pt',
+  'zh-hans-cn'
+]
+
+tags.forEach((tag) => console.log('%s -> %s', tag, bcp47Normalize(tag)))
+```
+
+Yields:
+
+```txt
+de-de-1901 -> de-1901
+en-gb -> en-GB
+en-us -> en
+en-bu -> en-MM
+hy-arevmda -> hyw
+nld-nl -> nl
+no-nyn -> nn
+pt-br -> pt
+pt-pt -> pt-PT
+zh-hans-cn -> zh
+```
+
+## API
+
+This package exports the identifier `bcp47Normalize`.
+There is no default export.
+
+### `bcp47Normalize(tag[, options])`
+
+Normalize the given BCP 47 tag according to [Unicode CLDR suggestions][alias].
+
+###### Parameters
+
+*   `tag` (`string`)
+    — BCP 47 tag
+*   `options.forgiving` (`boolean`, default: `false`)
+    — passed to `bcp-47` as [`options.forgiving`][forgiving]
+*   `options.warning` (`Function?`, default: `undefined`)
+    — passed to `bcp-47` as [`options.warning`][warning]
+
+    One additional warning is given:
+
+    | code | reason                                                     |
+    | :--- | :--------------------------------------------------------- |
+    | 7    | Deprecated region `CURRENT`, expected one of `SUGGESTIONS` |
+
+    This warning is only given if the region cannot be automatically fixed (when
+    regions split into multiple regions).
+
+###### Returns
+
+Normal, canonical, and pretty [BCP 47][spec] tag (`string`).
+
+## Types
+
+This package is fully typed with [TypeScript][].
+It exports the additional types `Options` and `Warning`.
+
+## Compatibility
+
+This package is at least compatible with all maintained versions of Node.js.
+As of now, that is Node.js 14.14+ and 16.0+.
+It also works in Deno and modern browsers.
+
+## Security
+
+This package is safe.
+
+## Related
+
+*   [`wooorm/bcp-47`](https://github.com/wooorm/bcp-47)
+    — parse and stringify BCP 47 language tags
+*   [`wooorm/bcp-47-match`](https://github.com/wooorm/bcp-47-match)
+    — match BCP 47 language tags with language ranges per RFC 4647
+*   [`wooorm/iso-3166`](https://github.com/wooorm/iso-3166)
+    — ISO 3166 codes
+*   [`wooorm/iso-639-2`](https://github.com/wooorm/iso-639-2)
+    — ISO 639-2 codes
+*   [`wooorm/iso-639-3`](https://github.com/wooorm/iso-639-3)
+    — ISO 639-3 codes
+*   [`wooorm/iso-15924`](https://github.com/wooorm/iso-15924)
+    — ISO 15924 codes
+*   [`wooorm/un-m49`](https://github.com/wooorm/un-m49)
+    — UN M49 codes
+
+## Contribute
+
+Yes please!
+See [How to Contribute to Open Source][contribute].
+
+## License
+
+[MIT][license] © [Titus Wormer][author]
+
+<!-- Definitions -->
+
+[build-badge]: https://github.com/wooorm/bcp-47-normalize/workflows/main/badge.svg
+
+[build]: https://github.com/wooorm/bcp-47-normalize/actions
+
+[coverage-badge]: https://img.shields.io/codecov/c/github/wooorm/bcp-47-normalize.svg
+
+[coverage]: https://codecov.io/github/wooorm/bcp-47-normalize
+
+[downloads-badge]: https://img.shields.io/npm/dm/bcp-47-normalize.svg
+
+[downloads]: https://www.npmjs.com/package/bcp-47-normalize
+
+[size-badge]: https://img.shields.io/bundlephobia/minzip/bcp-47-normalize.svg
+
+[size]: https://bundlephobia.com/result?p=bcp-47-normalize
+
+[npm]: https://docs.npmjs.com/cli/install
+
+[esmsh]: https://esm.sh
+
+[license]: license
+
+[author]: https://wooorm.com
+
+[esm]: https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c
+
+[typescript]: https://www.typescriptlang.org
+
+[contribute]: https://opensource.guide/how-to-contribute/
+
+[spec]: https://tools.ietf.org/rfc/bcp/bcp47.html
+
+[alias]: https://github.com/unicode-org/cldr/blob/142b327/common/supplemental/supplementalMetadata.xml#L32
+
+[forgiving]: https://github.com/wooorm/bcp-47#optionsforgiving
+
+[warning]: https://github.com/wooorm/bcp-47#optionswarning