# @phensley/language-tag

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Implements BCP 47 language tag parsing and construction.

## Installation

NPM:

```
npm install --save @phensley/language-tag
```

Yarn:

```
yarn add @phensley/language-tag
```

## Examples

```typescript
const IDS = ['en', 'es', 'es-419', 'und-AR', 'und-Hant', 'iw', 'i-klingon'];
for (const id of IDS) {
  const tag = parseLanguageTag(id);
  console.log(`${tag.compact().padStart(10)}  ${tag.expanded()}`);
}
```

```
        en  en-Zzzz-ZZ
        es  es-Zzzz-ZZ
    es-419  es-Zzzz-419
    und-AR  und-Zzzz-AR
  und-Hant  und-Hant-ZZ
        iw  iw-Zzzz-ZZ
       tlh  tlh-Zzzz-ZZ
```

```typescript
const t = new LanguageTag(undefined, 'latn', 'us', 'PoSiX', {
  u: ['ca-gregory']
});
console.log(t.expanded());
```

```
und-Latn-US-posix-u-ca-gregory
```