ietf-language-tag-regex

> Regular expressions for matching IETF language tags (BCP 47)

Based on this Stack Overflow comment by George Pollard.

Install

Usage

``js

const languageTagRegex = require('ietf-language-tag-regex')

languageTagRegex().test('en-GB') // true
languageTagRegex().test('a-DE') // false
languageTagRegex().test('zh-Hant') // true

`

API

$3

Returns a regex for matching IETF language tags.

#### options

##### exact

Type: boolean

Default: true

Only match an exact string. Useful with RegExp#test` to check if a string is a language tag.