npm package: @keeer/libphonenumber
Description: A simpler (and smaller) rewrite of Google Android's libphonenumber library in javascript
Author: catamphetamine
Latest version: 1.7.44-keeer1

# libphonenumber-js

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A simpler and smaller rewrite of Google Android's [`libphonenumber`](https://github.com/google/libphonenumber/blob/master/java/libphonenumber/) library in javascript.

[See Demo](https://catamphetamine.github.io/libphonenumber-js/)

## LibPhoneNumber

[`libphonenumber`](https://github.com/googlei18n/libphonenumber) is a phone number formatting and parsing library released by Google, originally developed for (and currently used in) Google's [Android](https://en.wikipedia.org/wiki/Android_(operating_system)) mobile phone operating system.

`libphonenumber-js` is a "lighter" pure javascript rewrite of the original `libphonenumber` library (written in C++ and Java because those are the programming languages used in Android OS). While `libphonenumber` has an [official autogenerated javascript port](https://github.com/googlei18n/libphonenumber/tree/master/javascript) which is being maintained by Google, it is tightly coupled to Google's `closure` javascript utility framework. It can still be compiled into [one gigantic bundle](https://github.com/ruimarinho/google-libphonenumber) which weighs 530 kilobytes (330 kB code + 200 kB metadata) — quite a size for a simple phone number input field on a casual website.

<!--
One part of me was curious about how all this phone number parsing and formatting machinery worked, and another part of me was curious if there was a way to reduce those 530 kilobytes to something more reasonable while also getting rid of all the unnecessary bulk and rewriting it all in pure javascript. The resulting library does everything a modern web application needs while maintaining a much smaller size of about 130 kilobytes.
-->

## Difference from Google's `libphonenumber`

  * Smaller footprint: 130 kilobytes (55 kB code + 75 kB sufficient metadata) vs the original Google's 530 kilobytes (330 kB code + 200 kB full metadata).
  * Can search for phone numbers in text (Google's autogenerated javascript port can't).
  * Doesn't parse alphabetic phone numbers like `1-800-GOT-MILK`.
  * Doesn't parse or format special "local"-only phone numbers: numbers specific to a "local" area (for example, a city) with the "area code" omitted (like `456-789` with the "area code" `(123)` omitted vs. the full `(123) 456-789` number), emergency phone numbers like `911`, ["short codes"](https://support.twilio.com/hc/en-us/articles/223182068-What-is-a-short-code-) (short SMS-only numbers), numbers starting with a [`*`](https://github.com/googlei18n/libphonenumber/blob/master/FALSEHOODS.md) (like `*555`), etc.
  * Doesn't use hyphens and brackets when formatting international phone numbers (looks cleaner).
  * Doesn't use the `"001"` country code for ["non-geographic"](#non-geographic) phone numbers. Instead, `PhoneNumber` class has an `.isNonGeographic()` method.

  <!--
  * Doesn't use ["carrier codes"](https://github.com/googlei18n/libphonenumber/blob/master/FALSEHOODS.md) when formatting numbers: "carrier codes" are only used in Colombia and Brazil and only when dialing within those countries from a mobile phone to a fixed line number.
  (`.formatNumberForMobileDialing()` method is not implemented therefore there's no need to format carrier codes)
  -->

## Install

via [npm](https://npmjs.org/)

```sh
$ npm install libphonenumber-js --save
```

via [yarn](https://yarnpkg.com)

```sh
$ yarn add libphonenumber-js
```

If you're not using a bundler then use a [standalone version from a CDN](https://github.com/catamphetamine/libphonenumber-js/#cdn).

## "min" vs "max" vs "mobile" vs "core"

This library requires choosing a "metadata" set to be used, "metadata" being a list of phone number parsing and formatting rules for all countries. The complete list of rules is huge, so this library provides a way to optimize bundle size by choosing between `max`, `min`, `mobile` and custom metadata:

* `max` — The complete metadata set, is about `140 kilobytes` in size (`libphonenumber-js/metadata.full.json`). Choose this when you need a strict version of `isValidPhoneNumber(value)` function, or if you need to get phone number type (fixed line, mobile, etc).

* `min` — (default) The smallest metadata set, is about `75 kilobytes` in size (`libphonenumber-js/metadata.min.json`). Doesn't contain regular expressions for advanced phone number validation ([`.isValid()`](https://github.com/catamphetamine/libphonenumber-js#isvalid)) and determining phone number type ([`.getType()`](https://github.com/catamphetamine/libphonenumber-js#gettype)) for most countries. Some simple phone number validation via `.isValid()` still works (basic length check, etc), it's just that it's loose compared to the "advanced" validation (not so strict). Choose this by default: when you don't need to get phone number type (fixed line, mobile, etc), or when a non-strict version of `isValidPhoneNumber(value)` function is enough.

* `mobile` — The complete metadata set for dealing with mobile numbers _only_, is about `105 kilobytes` in size (`libphonenumber-js/metadata.mobile.json`). Choose this when you _only_ work with mobile numbers and a strict version of `isValidPhoneNumber(value)` function is required for validating mobile numbers.

To use a particular metadata set import functions from the relevant sub-package: `libphonenumber-js/max`, `libphonenumber-js/min` or `libphonenumber-js/mobile`.

Importing functions directly from `libphonenumber-js` results in using the `min` metadata which means loose (non-strict) phone number validation via `.isValid()` and no getting phone number type via `.getType()` for most countries.

Sometimes (rarely) not all countries are needed and in those cases the developers may want to [generate](https://github.com/catamphetamine/libphonenumber-js#customizing-metadata) their own "custom" metadata set. For those cases there's `libphonenumber-js/core` sub-package which doesn't come pre-wired with any default metadata and instead accepts the metadata as the last argument of each exported function.

## Use

### Parse phone number

<!--
_(new API)_
-->

```js
import { parsePhoneNumberFromString } from 'libphonenumber-js'

const phoneNumber = parsePhoneNumberFromString('Phone: 8 (800) 555 35 35.', 'RU')
if (phoneNumber) {
  phoneNumber.country === 'RU'
  phoneNumber.number === '+78005553535'
  phoneNumber.isValid() === true
  phoneNumber.getType() === 'TOLL_FREE'
}
```

<!--
<details>
<summary>Legacy API</summary>

```js
import { parseNumber } from 'libphonenumber-js'

parseNumber('Phone: 8 (800) 555 35 35.', 'RU')
// Outputs: { country: 'RU', phone: '8005553535' }
```
</details>
-->

### Format phone number

<!--
_(new API)_
-->

```js
import { parsePhoneNumberFromString } from 'libphonenumber-js'

const phoneNumber = parsePhoneNumberFromString('+12133734253')

phoneNumber.formatInternational() === '+1 213 373 4253'
phoneNumber.formatNational() === '(213) 373-4253'
phoneNumber.getURI() === 'tel:+12133734253'
```

<!--
<details>
<summary>Legacy API</summary>

```js
import { formatNumber } from 'libphonenumber-js'

formatNumber('+12133734253', 'INTERNATIONAL')
// Outputs: '+1 213 373 4253'

formatNumber('+12133734253', 'NATIONAL')
// Outputs: '(213) 373-4253'

formatNumber({ country: 'US', phone: '2133734253' }, 'INTERNATIONAL')
// Outputs: '+1 213 373 4253'

formatNumber({ country: 'US', phone: '2133734253' }, 'NATIONAL')
// Outputs: '(213) 373-4253'
```
</details>
-->

### "As You Type" formatter

```js
import { AsYouType } from 'libphonenumber-js'

new AsYouType().input('+12133734')
// Outputs: '+1 213 373 4'

new AsYouType('US').input('2133734')
// Outputs: '(213) 373-4'
```

### Full-text search

<!--
_(new API)_
-->

```js
import { findPhoneNumbersInText } from 'libphonenumber-js'

findPhoneNumbersInText(`
  For tech support call +7 (800) 555-35-35 internationally
  or reach a local US branch at (213) 373-4253 ext. 1234.
`, 'US')

// Outputs:
//
// [{
//   number: PhoneNumber {
//     country: 'RU',
//     countryCallingCode: '7',
//     number: '+78005553535',
//     nationalNumber: '8005553535'
//   },
//   startsAt : 22,
//   endsAt   : 40
// }, {
//   number: PhoneNumber {
//     country: 'US',
//     countryCallingCode: '1',
//     number: '+12133734253',
//     nationalNumber: '2133734253',
//     ext: '1234'
//   },
//   startsAt : 86,
//   endsAt   : 110
// }]
```

## Definitions

### Country code

"Country code" means either a [two-letter ISO country code](https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2) (like `US`). <!-- or a special `001` country code used for ["non-geographic entities"](#non-geographic) (as per [Google's libphonenumber library](https://github.com/googlei18n/libphonenumber/blob/0068d861a68d3d4612f7bf8646ab844dd3cefce5/java/libphonenumber/test/com/google/i18n/phonenumbers/RegionCode.java#L23-L24)). -->

### Non-geographic

There're several calling codes that don't belong to any country:

* `+800` — [Universal International Toll Free Number](https://en.wikipedia.org/wiki/Toll-free_telephone_number)
* `+808` — [Universal International Shared Cost Number](https://en.wikipedia.org/wiki/Shared-cost_service)
* `+870` — [Inmarsat Global Limited](https://en.wikipedia.org/wiki/Inmarsat)
* `+878` — [Universal Personal Telecommunications](https://en.wikipedia.org/wiki/Universal_Personal_Telecommunications)
* `+881` — [Global Mobile Satellite System](https://en.wikipedia.org/wiki/Global_Mobile_Satellite_System)
* `+882` and `+883` — [International Networks](https://en.wikipedia.org/wiki/International_Networks_(country_code))
* `+888` — [United Nations Office for the Coordination of Humanitarian Affairs](https://en.wikipedia.org/wiki/United_Nations_Office_for_the_Coordination_of_Humanitarian_Affairs#International_Dialing_Code)
* `+979` — [International Premium Rate Service](https://en.wikipedia.org/wiki/International_Premium_Rate_Service)

Such phone numbering plans are called "non-geographic", and their phone numbers have `country` set to `undefined`.

### National (significant) number

"National (significant) number" are the national phone number digits (without "national prefix"). For example, `+1 213 373 4253` (or `(213) 373-4253` in national format) is a US phone number and its national (significant) number is `213 373 4253`. Another example is `+33 1 45 45 32 45` (or `01 45 45 32 45` in national format) which is a [French](https://en.wikipedia.org/wiki/Telephone_numbers_in_France) phone number where they add `0` "national prefix" when writing phone numbers in national format; in this case the national (significant) number is `1 45 45 32 45`.

### Country calling code

"Country calling code" are the digits between the `+` and the national (significant) number when the number is written in international format. E.g. for US country calling code is `1` and for France it's `33`. Several countries can share the same "country calling code", e.g. [NANPA](https://en.wikipedia.org/wiki/North_American_Numbering_Plan) countries like USA and Canada sharing the same `1` country calling code.

## API

### parsePhoneNumberFromString(string, [options or defaultCountry]): PhoneNumber

Parses a phone number from `string`.

```js
import { parsePhoneNumberFromString } from 'libphonenumber-js'

const phoneNumber = parsePhoneNumberFromString('Call: (213) 373-42-53 ext. 1234.', 'US')
if (phoneNumber) {
  console.log(phoneNumber.formatNational())
}
```

Returns an instance of [`PhoneNumber`](#phonenumber) class, or `undefined` if no phone number could be parsed: for example, when the string contains no phone number, or the phone number starts with a non-existent [country calling code](#country-calling-code), etc.

Available `options`:

* `defaultCountry` — Default country for parsing national numbers. Instead of passing `options.defaultCountry` one could pass `defaultCountry` argument directly.

* `defaultCallingCode` — Default calling code for parsing national numbers. Some numbering plans are for ["non-geographic numbering plans"](#non-geographic) and they don't have a country code, so `defaultCountry` can't be specified for them.

If a developer wants to know the exact reason why the phone number couldn't be parsed then they can use `parsePhoneNumber()` function which throws the exact error:

```js
import { parsePhoneNumber, ParseError } from 'libphonenumber-js'

try {
  const phoneNumber = parsePhoneNumber('Call: (213) 373-42-53 ext. 1234.', 'US')
} catch (error) {
  if (error instanceof ParseError) {
    // Not a phone number, non-existent country, etc.
    console.log(error.message)
  } else {
    throw error
  }
}
```

<details>
<summary>Possible errors</summary>

* `INVALID_COUNTRY` — When `defaultCountry` doesn't exist (`parsePhoneNumber('(111) 222-3333', 'XX')`) or isn't supported by this library, or when parsing non-international number without a `defaultCountry` (`parsePhoneNumber('(111) 222-3333')`), or when international number country calling code doesn't exist (`parsePhoneNumber('+9991112223333')`).

* `NOT_A_NUMBER` — When no phone number was found. For example, when there are no digits (`"abcde"`) or when there's not enough digits (`parsePhoneNumber('2', 'US')`, `parsePhoneNumber('+1')`).

* `TOO_LONG` — When national (significant) number is too long (17 digits max) or when the string being parsed is too long (250 characters max).

* `TOO_SHORT` — When national (significant) number is too short (for ex. 1 digit).
</details>

### `PhoneNumber`

<!--
`PhoneNumber` class constructor accepts two arguments: `country`/`countryCallingCode` and `nationalNumber`. Also `metadata`.

```js
const phoneNumber = new PhoneNumber('RU', '8005553535', metadata)
```
-->

`PhoneNumber` class instance has the following properties:

* `number: string` — The phone number in [`E.164`](https://en.wikipedia.org/wiki/E.164) format. Example: `"+12133734253"`.
* `countryCallingCode: string` — The [country calling code](#country-calling-code). Example: `"1"`.
* `nationalNumber: string` — The [national (significant) number](#national-significant-number). Example: `"2133734253"`.
* `country: string?` — The [country code](#country-code). Example: `"US"`. Will be `undefined` when no `country` could be derived from the phone number. For example, when several countries have the same `countryCallingCode` and the `nationalNumber` doesn't look like it belongs to any of them. Or when a number belongs to a [non-geographic numbering plan](#non-geographic).
* `ext: string?` — The [phone number extension](https://en.wikipedia.org/wiki/Extension_(telephone)), if any. Example: `"1234"`.
* `carrierCode: string?` — The ["carrier code"](https://www.voip-info.org/carrier-identification-codes/), if any. Example: `"15"`. "Carrier codes" are only used in Colombia and Brazil and only when dialing within those countries from a mobile phone to a fixed line number.

`PhoneNumber` class instance provides the following methods:

#### `format(format: string, [options]): string`

Formats the phone number into a string according to a `format`.

Available `format`s:

  * `NATIONAL` — Example: `"(213) 373-4253"`
  * `INTERNATIONAL` — Example: `"+1 213 373 4253"`
  * [`E.164`](https://en.wikipedia.org/wiki/E.164) — Example: `"+12133734253"`
  * [`RFC3966`](https://www.ietf.org/rfc/rfc3966.txt) (the phone number URI) — Example: `"tel:+12133734253;ext=123"`
  * `IDD` — ["Out-of-country" dialing](https://wikitravel.org/en/International_dialling_prefix) format. Example: `"01178005553535"` for `+7 800 555 35 35` being called out of `options.fromCountry === "US"`. If no `options.fromCountry` was passed or if there's no default IDD prefix for `options.fromCountry` then returns `undefined`. Pass `options.humanReadable: true` for a human-readable output (same output as Google `liphonenumber`'s `formatOutOfCountryCallingNumber()`).

Available `options`:

  * `formatExtension(number, extension)` — Formats `number` and `extension` into a string. By default returns `${number} ext. ${extension}` for almost all countries with rare exceptions of some special cases like `${number} x${extension}` for UK.

  * `humanReadable: Boolean` — Is only used for `IDD` formatting.

  * `nationalPrefix: Boolean` — Some phone numbers can be formatted both with national prefix and without it. In such cases the library defaults to "with national prefix" (for legacy reasons). Pass `nationalPrefix: false` option to force formatting without national prefix in such cases.

Examples:

```js
import { parsePhoneNumberFromString } from 'libphonenumber-js'

const phoneNumber = parsePhoneNumberFromString('+12133734253')

phoneNumber.format("NATIONAL") === '(213) 373-4253'
phoneNumber.format("INTERNATIONAL") === '+1 213 373 4253'
phoneNumber.format("RFC3966") === 'tel:+12133734253'

// Aliases
phoneNumber.formatNational() === phoneNumber.format("NATIONAL")
phoneNumber.formatInternational() === phoneNumber.format("INTERNATIONAL")
phoneNumber.getURI() === phoneNumber.format("RFC3966")
```

#### `isPossible(): boolean`

Checks if the phone number is "possible". Only checks the phone number length, doesn't check the number digits against any regular expressions.

#### `isValid(): boolean`

Checks if the phone number is "valid". First checks the phone number length and then checks the phone number digits against all available regular expressions.

By default the library uses "minimal" metadata which is only 75 kilobytes in size but also doesn't include the precise validation regular expressions resulting in less strict validation rules (some very basic validation like length check is still included for each country). If you don't mind the extra 65 kilobytes of metadata then use ["full" metadata](#min-vs-max-vs-mobile-vs-core) instead (140 kilobytes). Google's library always uses "full" metadata so it will yield different `isValidNumber()` results compared to the "minimal" metadata used by default in this library.

<details>
<summary>See an example illustrating different results when using <code>/min</code> vs <code>/max</code> vs <code>/mobile</code></summary>

####
```js
import { parsePhoneNumberFromString as parseMin } from 'libphonenumber-js'
import { parsePhoneNumberFromString as parseMax } from 'libphonenumber-js/max'
import { parsePhoneNumberFromString as parseMobile } from 'libphonenumber-js/mobile'

// Mobile numbers in Singapore starting from `8`
// can only have the second digit in the range of `0..8`.
// Here the second digit is `9` which makes it an invalid mobile number.
// This is a "strict" (advanced) validation rule and is
// not included in the (default) "min" bundle.

// The basic number length check passes (`8..11`) and the
// "loose" national number validation regexp check passes too:
// `(?:1\d{3}|[369]|7000|8(?:\d{2})?)\d{7}`.
parseMin('+6589555555').isValid() === true

// The "advanced" validation regexp for mobile numbers is
// `(?:8[1-8]|9[0-8])\\d{6}` and possible lengths are `8`.
parseMax('+6589555555').isValid() === false
parseMobile('+6589555555').isValid() === false
```
</details>

####

See also ["Using phone number validation feature"](#using-phone-number-validation-feature) considerations.

<!--
#### `isValidForRegion(country)`

Is just an alias for `this.isValid() && this.country === country`.
https://github.com/googlei18n/libphonenumber/blob/master/FAQ.md#when-should-i-use-isvalidnumberforregion
-->

#### `getType(): string?`

Returns phone number type (fixed line, mobile, toll free, etc) or `undefined` (if the number is invalid or if there are no phone number type regular expressions for this country in metadata).

By default the library uses "minimal" metadata which is only 75 kilobytes in size but also doesn't include the regular expressions for determining a specific phone number type (fixed line, mobile, toll free, etc) resulting in `getType()` returning `undefined` for most countries. If you don't mind the extra 65 kilobytes of metadata then use ["full" metadata](#min-vs-max-vs-mobile-vs-core) instead (140 kilobytes). Google's library always uses "full" metadata so it will yield different `getNumberType()` results compared to the "minimal" metadata used by default in this library.

<details>
<summary>The list of possible return values</summary>

####

* `MOBILE`
* `FIXED_LINE`
* `FIXED_LINE_OR_MOBILE`
* `PREMIUM_RATE`
* `TOLL_FREE`
* `SHARED_COST`
* `VOIP`
* `PERSONAL_NUMBER`
* `PAGER`
* `UAN`
* `VOICEMAIL`
</details>

####

<details>
<summary>See an example illustrating different results when using <code>/min</code> vs <code>/max</code> vs <code>/mobile</code></summary>

####
```js
import { parsePhoneNumberFromString as parseMin } from 'libphonenumber-js'
import { parsePhoneNumberFromString as parseMax } from 'libphonenumber-js/max'
import { parsePhoneNumberFromString as parseMobile } from 'libphonenumber-js/mobile'

// Singapore valid mobile number.

// The (default) "min" bundle doesn't contain any regexps for
// getting phone number type based on national number (for Singapore).
parseMin('+6584655555').getType() === undefined

// The "max" bundle contains regexps for
// getting phone number type based on national number
// for all possible phone number types.
parseMax('+6584655555').getType() === 'MOBILE'

// The "mobile" bundle contains regexps for
// getting phone number type based on national number
// for mobile phone numbers only.
parseMobile('+6584655555').getType() === 'MOBILE'
```
</details>

#### `isNonGeographic(): boolean`

Returns `true` if the number belongs to a ["non-geographic numbering plan"](#non-geographic).

#### `isEqual(phoneNumber: PhoneNumber): boolean`

Compares two `PhoneNumber`s: returns `true` if they're equal, `false` otherwise.

### `class` AsYouType([options or defaultCountry])

Creates a formatter for a partially entered phone number.

Available `options`:

* `defaultCountry` — Default country for parsing national numbers. Instead of passing `options.defaultCountry` one could pass `defaultCountry` argument directly.

* `defaultCallingCode` — Default calling code for parsing national numbers. Some numbering plans are for ["non-geographic numbering plans"](#non-geographic) and they don't have a country code, so `defaultCountry` can't be specified for them.

 * `input(text)` — Takes any text, parses it and appends the digits to the input. Returns the formatted phone number.
 * `reset()` — Resets the input.

```js
new AsYouType().input('+12133734') === '+1 213 373 4'
new AsYouType('US').input('2133734') === '(213) 373-4'
```

The formatter instance also provides the following getters:

 * `getNumber(): PhoneNumber` — Returns the [`PhoneNumber`](#phonenumber). Will return `undefined` if no [national (significant) number](#national-significant-number) digits have been entered so far, or if no `defaultCountry`/`defaultCallingCode` has been set and the user enters a phone number not in international format.

 * `getTemplate(): string` — Returns the template used to format the output. Digits (and the `+` sign, if present) are denoted by `x`-es.

```js
// National phone number input example.

const asYouType = new AsYouType('US')

asYouType.input('2') === '2'
asYouType.getNumber().number === '+12'
asYouType.getTemplate() === 'x'

asYouType.input('1') === '21'
asYouType.getNumber().number === '+121'
asYouType.getTemplate() === 'xx'

asYouType.input('3') === '(213)'
asYouType.getNumber().number === '+1213'
asYouType.getTemplate() === '(xxx)'

asYouType.input('3734253') === '(213) 373-4253'
asYouType.getNumber().number === '+12133734253'
asYouType.getTemplate() === '(xxx) xxx-xxxx'

// International phone number input example.

const asYouType = new AsYouType()
asYouType.input('+1-213-373-4253') === '+1 213 373 4253'
asYouType.getNumber().country === 'US'
asYouType.getNumber().number === '+12133734253'
asYouType.getTemplate() === 'xx xxx xxx xxxx'
```

<details>
<summary>Legacy API (before version <code>1.6.0</code>)</summary>

####

For legacy API (before version `1.6.0`) the formatter instance provides the following getters:

 * `country: string?` — Phone number [country](#country-code). Will return `undefined` if the country couldn't be derived from the number.

 * `getNationalNumber(): string` — Returns the national (significant) number part of the phone number.

 * `getTemplate(): string?` — Returns the template used to format the output. Digits (and the `+` sign, if present) are denoted by `x`-es. Will return `undefined` if no suitable format was found for the number being entered (or if no [national (significant) number](#national-significant-number) has been entered so far).

```js
// National phone number input example.

const asYouType = new AsYouType('US')

asYouType.input('2') === '2'
asYouType.getNationalNumber() === '2'
asYouType.getTemplate() === 'x'

asYouType.input('1') === '21'
asYouType.getNationalNumber() === '21'
asYouType.getTemplate() === 'xx'

asYouType.input('3') === '(213)'
asYouType.getNationalNumber() === '213'
asYouType.getTemplate() === '(xxx)'

asYouType.input('3734253') === '(213) 373-4253'
asYouType.getNationalNumber() === '2133734253'
asYouType.getTemplate() === '(xxx) xxx-xxxx'

// International phone number input example.

const asYouType = new AsYouType()
asYouType.input('+1-213-373-4253') === '+1 213 373 4253'
asYouType.country === 'US'
asYouType.getNationalNumber() === '2133734253'
asYouType.getTemplate() === 'xx xxx xxx xxxx'
```
</details>

####

"As You Type" formatter was created by Google as part of their Android OS and therefore only works for numerical keyboard input, i.e. it can only accept digits (and a `+` sign in the start of an international number). When used on desktops where a user can input all kinds of punctuation (spaces, dashes, parens, etc) it simply ignores everything except digits (and a `+` sign in the start of an international number).

Google's "As You Type" formatter does not support entering phone number extensions. If your project requires phone number extensions input then use a separate input field for that.

### findPhoneNumbersInText(text: string, [defaultCountry: string?], [options]): object[]

Searches for phone numbers in `text`.

Available `options`:

* `defaultCountry` — Default country for parsing national numbers. Instead of passing `options.defaultCountry` one could pass `defaultCountry` argument directly.

* `defaultCallingCode` — Default calling code for parsing national numbers. Some numbering plans are for ["non-geographic numbering plans"](#non-geographic) and they don't have a country code, so `defaultCountry` can't be specified for them.

```js
import { findPhoneNumbersInText } from 'libphonenumber-js'

findPhoneNumbersInText(`
  For tech support call +7 (800) 555-35-35 internationally
  or reach a local US branch at (213) 373-4253 ext. 1234.
`, 'US')

// Outputs:
//
// [{
//   number: PhoneNumber {
//     country: 'RU',
//     countryCallingCode: '7',
//     number: '+78005553535',
//     nationalNumber: '8005553535'
//   },
//   startsAt : 22,
//   endsAt   : 40
// }, {
//   number: PhoneNumber {
//     country: 'US',
//     countryCallingCode: '1',
//     number: '+12133734253',
//     nationalNumber: '2133734253',
//     ext: '1234'
//   },
//   startsAt : 86,
//   endsAt   : 110
// }]
```

(in previous versions, it was called `findNumbers()`)

<details>
<summary>Legacy API (before version <code>1.6.0</code>) example</summary>

####

```js
import { findNumbers } from 'libphonenumber-js'

findNumbers(`
  For tech support call +7 (800) 555-35-35 internationally
  or reach a local US branch at (213) 373-4253 ext. 1234.
`, 'US')

// Outputs:
//
// [{
//   phone    : '8005553535',
//   country  : 'RU',
//   startsAt : 22,
//   endsAt   : 40
// },
// {
//   phone    : '2133734253',
//   country  : 'US',
//   ext      : '1234',
//   startsAt : 86,
//   endsAt   : 110
// }]
```
</details>

####

By default it processes the whole text and then outputs the phone numbers found. If the text is very big (say, a hundred thousand characters) then it might freeze the user interface for a couple of seconds. To avoid such lags one can employ "iterator" approach using `searchPhoneNumbersInText()` to perform the search asynchronously (e.g. using `requestIdleCallback` or `requestAnimationFrame`).

(in previous versions, it was called `searchNumbers()`)

<details>
<summary>Asynchronous search example using <code>searchPhoneNumbersInText()</code></summary>

####

ES6 iterator:

```js
import { searchPhoneNumbersInText } from 'libphonenumber-js'

const text = `
  For tech support call +7 (800) 555-35-35 internationally
  or reach a local US branch at (213) 373-4253 ext. 1234.
`

async function() {
  for (const number of searchPhoneNumbersInText(text, 'US')) {
    console.log(number)
    await new Promise(resolve => setTimeout(resolve, 0))
  }
  console.log('Finished')
}
```

Java-style iterator (for those still not using ES6):

```js
import { PhoneNumberMatcher } from 'libphonenumber-js'

const matcher = new PhoneNumberMatcher(`
  For tech support call +7 (800) 555-35-35 internationally
  or reach a local US branch at (213) 373-4253 ext. 1234.
`, {
  defaultCountry: 'US',
  v2: true
})

// Search cycle iteration.
const iteration = () => {
  if (matcher.hasNext()) {
    console.log(matcher.next())
    setTimeout(iteration, 0)
  } else {
    console.log('Finished')
  }
}

// Run the search.
iteration()
```
</details>

####

Although Google's javascript port doesn't have the `findPhoneNumbersInText()` functionality the Java and C++ ports do. I guess Google just doesn't need to crawl phone numbers on Node.js because they can afford to hire a Java/C++ developer to do that. Still, javascript nowadays is the most popular programming language given its simplicity and user-friendliness. The `findPhoneNumbersInText()` function provided is a port of Google's `PhoneNumberMatcher.java` into javascript.

### getExampleNumber(country: string, examples: object): PhoneNumber

Returns an example phone number for a [country](#country-code). Returns an instance of [`PhoneNumber`](#phonenumber) class. Will return `undefined` if `country` doesn't exist or isn't supported by this library.

```js
import examples from 'libphonenumber-js/examples.mobile.json'
import { getExampleNumber } from 'libphonenumber-js'

const phoneNumber = getExampleNumber('RU', examples)

phoneNumber.formatNational() === '8 (912) 345-67-89'
```

### isSupportedCountry(country: string): boolean

Checks if a country is supported by this library.

```js
isSupportedCountry('RU') === true
isSupportedCountry('XX') === false
```

### getCountries(): string[]

Returns a list of supported countries.

<!-- (excluding `"001"` that stands for ["non-geographic entity"](#non-geographic)). -->

```js
getCountries() === ["AC", "AD", ...]
```

### getCountryCallingCode(country: string): string

Returns [country calling code](#country-calling-code) for a [country](#country-code). Will throw an error if `country` doesn't exist or isn't supported by this library.

```js
getCountryCallingCode('RU') === '7'
getCountryCallingCode('IL') === '972'
```

### getExtPrefix(country: string): string

Returns phone number extension prefix for a given `country`. If no custom ext prefix is defined for a `country` then the default `" ext. "` prefix is returned.

```js
getExtPrefix('US') === ' ext. '
getExtPrefix('GB') === ' x'
```

<!--
### parsePhoneNumberCharacter(nextCharacter, value)

Parses next character while parsing `value` from text: discards everything except `+` and digits, and `+` is only allowed at the start of a phone number. Can be used for [`input-format`](https://github.com/catamphetamine/input-format).

```js
parsePhoneNumberCharacter('5', '880055') === '5'
parsePhoneNumberCharacter('+', '') === '+'
parsePhoneNumberCharacter('+', '+7800') === ''
parsePhoneNumberCharacter('a', '') === ''
```
-->

### parseDigits(text: string): string

Parses digits from string. Can be used for building a phone number extension input component (e.g. [react-phone-number-input](https://github.com/catamphetamine/react-phone-number-input/)).

```js
parseDigits('x123') === '123'
parseDigits('٤٤٢٣') === '4423'
```

### parseIncompletePhoneNumber(text: string): string

Parses phone number characters (`+` and digits). Can be used for building a phone number input component (e.g. [react-phone-number-input](https://github.com/catamphetamine/react-phone-number-input/)).

```js
parseIncompletePhoneNumber('8 (800) 555') === '8800555'
parseIncompletePhoneNumber('+7 800 555') === '+7800555'
parseIncompletePhoneNumber('+٤٤٢٣٢٣٢٣٤') === '+442323234'
```

### formatIncompletePhoneNumber(value: string, country: string?): string

Formats incomplete phone number as a national one for a given `country`. If `country` is not specified then outputs the phone number in international format. This is just an alias for `new AsYouType(country, metadata).input(value)`. Can be used for building a phone number input component (e.g. [react-phone-number-input](https://github.com/catamphetamine/react-phone-number-input/)).

```js
formatIncompletePhoneNumber('8800555', 'RU') === '8 (800) 555'
formatIncompletePhoneNumber('+7800555') === '+7 800 555'
```

## Legacy API

<details>
<summary>Legacy API (before version <code>1.6.0</code>): <code>parse()</code>, <code>parseNumber()</code>, <code>format()</code>, <code>formatNumber()</code>, <code>isValidNumber()</code>, <code>getNumberType()</code>.</summary>

### parseNumber(text, [defaultCountry], [options])

_(previously called `parse()`)_

_(legacy API)_

Attempts to parse a phone number from `text`.

If [`defaultCountry`](#country-code) is passed then it's gonna be the default country for parsing non-international phone numbers.

Returns `{ country, phone, ext }` object where
 * `country` is a [country code](#country-code).
 * `phone` is a [national (significant) number](#national-significant-number).
 * `ext` is a [phone number extension](https://en.wikipedia.org/wiki/Extension_(telephone)).

If the phone number supplied isn't valid then an empty object `{}` is returned.

<details>
<summary>Examples</summary>

```js
// Parses international numbers.
parseNumber('+1 213 373 4253') === { country: 'US', phone: '2133734253' }
parseNumber('Phone: +1-213-373-4253.') === { country: 'US', phone: '2133734253' }
parseNumber('+12133734253') === { country: 'US', phone: '2133734253' }

// Parses national numbers provided a default country.
parseNumber('Phone: (213) 373-4253.', 'US') === { country: 'US', phone: '2133734253' }

// Parses phone number extensions.
parseNumber('(213) 373-4253 ext. 123', 'US') === { country: 'US', phone: '2133734253', ext: '123' }

// Parses RFC 3966 phone number URIs.
parseNumber('tel:+78005553535;ext=123') === { country: 'RU', phone: '8005553535', ext: '123' }
```

If the phone number supplied isn't valid then an empty object `{}` is returned.

```js
parseNumber('+1 111 111 1111') === {}
parseNumber('(111) 111-1111', 'US') === {}
parseNumber('abcdefg') === {}
```
</details>

####

Available `options`:

 * `defaultCountry : string` — Same as the `defaultCountry` argument.

 * `extended : boolean` — If set to `true` then `parseNumber()` will attempt to parse even a remotely hypothetical phone number even if it is considered "invalid".

<details>
<summary><code>{ extended: true }</code> documentation and examples</summary>

The result of "extended" parsing is an object where

 * `country` is a [country code](#country-code).
 * `phone` is a [national (significant) number](#national-significant-number).
 * `ext` is a [phone number extension](https://en.wikipedia.org/wiki/Extension_(telephone)).
 * `countryCallingCode` is a [country calling code](#country-calling-code).
 * [`carrierCode`](https://www.voip-info.org/carrier-identification-codes/)s are only used in Colombia and Brazil and only when dialing within those countries from a mobile phone to a fixed line number.
 * `valid: boolean` — whether it's a "valid" (real) phone number.
 * `possible: boolean` — a phone number is considered "possible" when it fits the phone number length rules for a given country. E.g. for US national (significant) number regexp is `[2-9]\d{9}` and possible national (significant) number length is `10` so a phone number `(111) 111-1111` is not a "valid" number because it doesn't match the US national (significant) number regexp but it is a "possible" number because it's `10` digits long.
 * Some or all of these properties may be absent from the result object.

```js
// If the number is valid.
parseNumber('Phone: (213) 373-4253.', 'US', { extended: true }) ===
{
  country: 'US',
  phone: '2133734253',
  ext: undefined,
  countryCallingCode: 1,
  carrierCode: undefined,
  valid: true,
  possible: true
}

// If the number is not "valid" but "possible".
parseNumber('(111) 111-1111', 'US', { extended: true }) ===
{
  country: 'US',
  phone: '1111111111',
  ext: undefined,
  countryCallingCode: 1,
  carrierCode: undefined,
  valid: false,
  possible: true
}

// If the number is not "valid" but "possible"
// and country can't be derived from it.
// (e.g. can't tell if it's a US number or a Canadian number)
parseNumber('+1 111 111 1111', { extended: true }) ===
{
  country: undefined,
  phone: '1111111111',
  ext: undefined,
  countryCallingCode: 1,
  carrierCode: undefined,
  valid: false,
  possible: true
}

// If the number is not "possible" (invalid length).
parseNumber('(213) 373', 'US', { extended: true }) ===
{
  country: 'US',
  phone: '213373',
  ext: undefined,
  countryCallingCode: 1,
  carrierCode: undefined,
  valid: false,
  possible: false
}

// In some cases if the number is extremely not "possible"
// then an empty object `{}` is returned.
//
// Too short (or too long) for any country's phone number.
parseNumber('1', 'US', { extended: true }) === {}
// Non-existent country calling code.
parseNumber('+210', { extended: true }) === {}
// No phone number found.
parseNumber('abcdefg', 'US', { extended: true }) === {}
```

The "extended" parsing mode is the default behaviour of the original Google's `libphonenumber`: it still returns parsed data even if the phone number being parsed is not considered valid (but is kinda "possible"). I guess this kind of behaviour is better for crawling websites for phone numbers because when mining "big data" it is better to extract all possible info rather than discard some pieces of it prematurely, e.g. when national (significant) number regexp for some country gets outdated which might very well happen because phone numbering plans are changing constantly around the world. Maybe after all it would make sense to make the "extended" parsing mode the default one in the next major version. I guess it would.
</details>

####

<details>
<summary>Also parses IDD-prefixed phone numbers</summary>

Sometimes users icorrectly input phone numbers in ["out-of-country" dialing](https://wikitravel.org/en/International_dialling_prefix) (IDD-prefixed) format instead of the proper international phone number format (the "+" notation). In such cases `parseNumber()` will attempt to parse such IDD-prefixed numbers if "default country" is provided:

```js
// International format.
parseNumber('+61 2 3456 7890') === { country: 'AU', phone: '234567890' }
// IDD-prefixed format.
parseNumber('011 61 2 3456 7890', 'US') === { country: 'AU', phone: '234567890' }
```
</details>

### formatNumber(number, format, [options])

_(previously called `format()`)_

_(legacy API)_

Formats a `number` into a string according to a `format`.

Available `format`s and `options` are the same as for [`PhoneNumber.format(format)`](#formatformat-string-options).

The `number` argument must be either a result of `parseNumber()` function call (to strip national prefix) or an E.164 phone number string (e.g. `+12133734253`).

<details>
<summary>Examples</summary>

```js
// Formats E.164 phone numbers.
formatNumber('+12133734253', 'NATIONAL') === '(213) 373-4253'
formatNumber('+12133734253', 'INTERNATIONAL') === '+1 213 373 4253'

// Formats E.164 phone numbers when
// they're not "valid" but still "possible".
formatNumber('+11111111111', 'NATIONAL') === '(111) 111-1111'
formatNumber('+11111111111', 'INTERNATIONAL') === '+1 111 111 1111'

// Formats E.164 phone numbers when
// they're not "valid" and not "possible" (invalid length).
formatNumber('+11111', 'NATIONAL') === '1111'
formatNumber('+11111', 'INTERNATIONAL') === '+1 1111'

// Formats a result of `parseNumber()` function call.
const parsedNumber = parseNumber('2133734253', 'US')
formatNumber(parsedNumber, 'NATIONAL') === '(213) 373-4253'
formatNumber(parsedNumber, 'INTERNATIONAL') === '+1 213 373 4253'

// Formats a result of `parseNumber()` function call in "extended" mode
// when it's not a "valid" number but is still a "possible" one.
const possibleNumber = parseNumber('+11111111111', { extended: true })
formatNumber(possibleNumber, 'NATIONAL') === '(111) 111-1111'
formatNumber(possibleNumber, 'INTERNATIONAL') === '+1 111 111 1111'

// Formats a result of `parseNumber()` function call in "extended" mode
// when it's neither a "valid" number nor a "possible" one (invalid length).
const possibleNumber = parseNumber('+11111', { extended: true })
formatNumber(possibleNumber, 'NATIONAL') === '1111'
formatNumber(possibleNumber, 'INTERNATIONAL') === '+1 1111'

// Formats phone number extensions.
formatNumber({ country: 'US', phone: '2133734253', ext: '123' }, 'NATIONAL') ===  '(213) 373-4253 ext. 123'

// When given an object not having `phone` property
// (e.g. a empty object `{}`) it will throw.
formatNumber({}) throws Error
```
</details>

### getNumberType(number, [defaultCountry])

_(legacy API)_

See the description for [`PhoneNumber.getType()`](#gettype).

The `number` argument can be either a result of the `parseNumber()` function call — `{ country, phone }` — or a string (phone number digits only) possibly accompanied with the second `defaultCountry` argument.

<details>
<summary>Examples</summary>

```js
getNumberType('+79160151539') === 'MOBILE'
getNumberType('9160151539', 'RU') === 'MOBILE'
getNumberType({ phone: '9160151539', country: 'RU' }) === 'MOBILE'
```
</details>

### isValidNumber(number, [defaultCountry])

_(legacy API)_

Checks if a phone number is valid, the validation is more strict than `parseNumber()`.

The `number` argument can be either a result of the `parseNumber()` function call — `{ country, phone }` — or a string (phone number digits only) possibly accompanied with the second `defaultCountry` argument.

<details>
<summary>Examples</summary>

```js
isValidNumber('+12133734253') === true
isValidNumber('+1213373') === false

isValidNumber('2133734253', 'US') === true
isValidNumber('21337', 'US') === false

isValidNumber({ phone: '2133734253', country: 'US' }) === true
```
</details>

####

<details>
<summary>The difference between using <code>parseNumber()</code> and <code>isValidNumber()</code></summary>

The difference between using `parseNumber()` and `isValidNumber()` for phone number validation is that `isValidNumber()` also checks the precise regular expressions of possible phone numbers for a country. For example, for Germany `parseNumber('123456', 'DE')` would return `{ country: 'DE', phone: '123456' }` because this phone number matches the general phone number rules for Germany (basic length check, etc). But, if the metadata is compiled with `--extended` (or relevant `--types`) flag (see [Customizing metadata](#customizing-metadata) section of this document) then `isValidNumber()` is gonna use those precise regular expressions for extensive validation and `isValid('123456', 'DE')` will return `false` because the phone number `123456` doesn't actually exist in Germany.

This is how it is implemented in the original Google's [`libphonenumber`](https://static.javadoc.io/com.googlecode.libphonenumber/libphonenumber/8.9.1/com/google/i18n/phonenumbers/PhoneNumberUtil.html#parse-java.lang.CharSequence-java.lang.String-): `parseNumber()` parses phone numbers and loosely validates them while `isValidNumber()` validates phone numbers precisely (provided the precise regular expressions are included in metadata).

The precise regular expressions aren't included in the default metadata because that would cause the default metadata to grow twice in its size: the complete ("full") metadata size is about 145 kilobytes while the reduced ("default") metadata size is about 77 kilobytes. Hence in the default configuration `isValidNumber()` performs absolutely the same "lite" validation as `parseNumber()`. For enabling extensive phone number validation the simplest way is to import functions from `libphonenumber-js/custom` module and supply them with `libphonenumber-js/metadata.full.json`. For generating custom metadata see the instructions provided in the [Customizing metadata](#customizing-metadata) section of this document.
</details>

####

<details>
<summary><code>isValidNumberForRegion()</code></summary>

The optional `defaultCountry` argument is the _default_ country, i.e. it does not restrict to just that country, e.g. in those cases where several countries share the same phone numbering rules (NANPA, Britain, etc). For example, even though the number `07624 369230` belongs to the Isle of Man ("IM" country code) calling `isValidNumber('07624369230', 'GB')` still returns `true` because the country is not restricted to `GB`, it's just that `GB` is the default one for the phone numbering rules. For restricting the country see `isValidNumberForRegion()` though restricting a country [might not be a good idea](https://github.com/googlei18n/libphonenumber/blob/master/FAQ.md#when-should-i-use-isvalidnumberforregion).

```js
// Even though '07624 369230' number belongs to the Isle of Man ("IM")
// the `defaultCountry` argument "GB" still works here because
// "GB" and "IM" both share the same phone numbering rules ("+44").
isValidNumber('07624369230', 'GB') === true
isValidNumber('07624369230', 'IM') === true

// Imposing country restrictions.
isValidNumberForRegion('07624369230', 'GB') === false
isValidNumberForRegion('07624369230', 'IM') === true
```
</details>
</details>

## Using phone number validation feature

I personally don't use strict phone number validation in my projects because telephone numbering plans sometimes change and so validation rules can change too which means that [`PhoneNumber.isValid()`](#isvalid) function may become outdated if a website isn't re-deployed regularly. For example:

* New phone number rules can be added to Google's `libphonenumber` library after they have already been implemented in real life (which can introduce a delay).

<!--
* Then those new rules from Google's `libphonenumber` are updated automatically in this library (the scheduled update script introduces a small delay of 1 day, unless it malfunctions).
-->

* After that those new rules from Google's `libphonenumber` are merged in this library (another delay).

* And then there's still the web application itself using this library and until a developer installs `libphonenumber-js@latest` manually and rebuilds and redeploys the web application, it's gonna use the old (potentially outdated) phone number validation rules which could result in losing rare customers with newly valid (but previously non-valid) phone numbers if a website form is too strict about validating user's input.

Phone number validation rules are [being updated regularly](https://github.com/googlei18n/libphonenumber/commits/master/resources/PhoneNumberMetadata.xml) in Google's repo. Imagine a web application (for example, a "promo-site" or a "personal website") with a "Contact Us" form being deployed once and then running for years without any maintenance.

If it was required to validate a phone number being input by a user, then I'd personally use something like [`PhoneNumber.isPossible()`](#ispossible) that just validates phone number length.

## React

There's also a React component utilizing this library — [`react-phone-number-input`](https://github.com/catamphetamine/react-phone-number-input) (or [without country select](https://github.com/catamphetamine/react-phone-number-input#without-country-select)).

## Bug reporting

When reporting an issue one must also provide a link to [Google's `libphonenumber` demo page](https://libphonenumber.appspot.com/) illustrating the expected behaviour. This includes validation, parsing, formatting and "as you type" formatting. For example, for an Australian number `438 331 999` Google's demo [outputs four sections](https://libphonenumber.appspot.com/phonenumberparser?number=438331999&country=AU) — "Parsing Result", "Validation Results", "Formatting Results" and "AsYouTypeFormatter Results". In a bug report, first describe the observed `libphonenumber-js` demo result and then Google's demo result (with a link to it) which must differ from the observed `libphonenumber-js` demo result. If the observed `libphonenumber-js` demo result is the same as Google's demo result and you don't agree with Google's demo result then create an issue in [Google's repo](https://github.com/googlei18n/libphonenumber).

<!--
Phone number validation bugs should **only** be reported if they appear when using [custom metadata functions](#customizing-metadata) fed with `metadata.full.json` because by default all functions in this library use the reduced metadata set which results in looser validation than the original Google `libphonenumber`'s. The [demo page](https://catamphetamine.github.io/libphonenumber-js/) also uses the reduced metadata set and therefore its validation is also looser than the original Google `libphonenumber`'s.

There is also a possibility of this library's demo metadata being outdated, or this library's metadata lagging behind Google's (I have to update it manually from time to time due to `ssh-agent` not working properly on Windows).
-->

When reporting `findPhoneNumbersInText()` bugs one should know that `findPhoneNumbersInText()` code was ported from [Google's Java code](https://github.com/googlei18n/libphonenumber/blob/master/java/libphonenumber/src/com/google/i18n/phonenumbers/PhoneNumberMatcher.java). I didn't write it myself, I just ported it. Therefore, it is unlikely that anyone other than Google will be fixing such bugs.

## TypeScript

[TypeScript support](https://github.com/catamphetamine/libphonenumber-js/blob/master/index.d.ts) for this library is entirely community-driven. I myself don't use TypeScript. Send your pull requests.

## CDN

One can use any npm CDN service, e.g. [unpkg.com](https://unpkg.com) or [jsdelivr.com](https://jsdelivr.com)

```html
<script src="https://unpkg.com/libphonenumber-js@[version]/bundle/libphonenumber-[type].js"></script>

<script>
  alert(new libphonenumber.AsYouType('US').input('213-373-4253'))
</script>
```

where `[version]` is an npm package version range (for example, `1.x` or `^1.7.6`) and `[type]` is the bundle type: `min`, `max` or `mobile`.

<!--
## Standalone

For those who aren't using bundlers for some reason there's a way to build a standalone version of the library

 * `git clone https://github.com/catamphetamine/libphonenumber-js.git`
 * `npm install`
 * `npm run build`
 * See the `bundle` folder for `libphonenumber-js.min.js`

```html
<script src="/scripts/libphonenumber-js.min.js"></script>
<script>
  alert(new libphonenumber.AsYouType('US').input('213-373-4253'))
</script>
```
-->

## Metadata

Metadata is generated from Google's original [`PhoneNumberMetadata.xml`](https://github.com/googlei18n/libphonenumber/blob/master/resources/PhoneNumberMetadata.xml) by transforming XML into JSON and removing unnecessary fields. See [metadata fields description](https://github.com/catamphetamine/libphonenumber-js/blob/master/METADATA.md).

<!--
Currently I have a script set up monitoring changes to `PhoneNumberMetadata.xml` in Google's repo and automatically releasing new versions of this library when metadata in Google's repo gets updated. So this library's metadata is supposed to be up-to-date. Still, in case the automatic metadata update script malfunctions some day, anyone can request metadata update via a Pull Request here on GitHub:
-->

The metadata update process is automated through an "autoupdate" script (see `./autoupdate.sh` or `./autoupdate.cmd`). The script detects changes to `PhoneNumberMetadata.xml` in Google `libphonenumber`'s repo and if there are changes then it pulls the latest metadata, processes it, commits the changes to GitHub, builds a new version of the library and releases it to NPM. So this library's metadata is supposed to be up-to-date. I could set up this script to run automatically but on my Windows machine `ssh-agent` doesn't work properly so I run the "autoupdate" script manually from time to time.

<!--
In case I forget to run the "autoupdate" script for a long time anyone can request metadata update via a Pull Request here on GitHub:

  * Fork this repo
  * `npm install`
  * `npm run metadata:update:branch`
  * Submit a Pull Request to this repo from the `update-metadata` branch of your fork

`npm run metadata:update:branch` command creates a new `update-metadata` branch, downloads the new [`PhoneNumberMetadata.xml`](https://github.com/googlei18n/libphonenumber/blob/master/resources/PhoneNumberMetadata.xml) into the project folder replacing the old one, generates JSON metadata out of the XML one, checks if the metadata has changed, runs the tests, commits the new metadata and pushes the commit to the remote `update-metadata` branch of your fork.

Alternatively, a developer may wish to update metadata urgently, without waiting for a pull request approval. In this case just perform the steps described in the [Customizing metadata](#customizing-metadata) section of this document.
-->

## Customizing metadata

This library comes prepackaged with three flavors of [metadata](#metadata):

* `metadata.full.json` — contains everything, including all regular expressions for precise phone number validation and getting phone number type, but is about `140 kilobytes` in size.
* `metadata.min.json` — (default) the minimal one, doesn't contain regular expressions for precise phone number validation and getting phone number type for most countries, is about `75 kilobytes` in size.
* `metadata.mobile.json` — is the "full" metadata which _only_ supports mobile numbers, is about `105 kilobytes` in size.

Sometimes, if only a specific set of countries is needed in a project, and a developer really wants to reduce the resulting bundle size, say, by 50 kilobytes (even when including all regular expressions for precise phone number validation and getting phone number type), then they can generate such custom metadata and pass it as the last argument to this library's "core" (used to be called "custom") functions.

<details>
<summary>See generate custom metadata instructions.</summary>

####

First, add metadata generation script to **your project's** `package.json`

```js
{
  "scripts": {
    "libphonenumber-metadata": "libphonenumber-generate-metadata metadata.custom.json --countries RU,DE --extended",
  }
}
```

And then run it like `npm run libphonenumber-metadata`.

The arguments are:

* The first argument is the output metadata file path.
* `--countries` argument is a comma-separated list of the countries included (if `--countries` is omitted then all countries are included).
* `--extended` argument may be passed to include all regular expressions for precise phone number validation and getting phone number type, which will enlarge the resulting metadata size approximately twice.
* `--types ...` argument may be passed instead of `--extended` to generate metadata that _only_ supports the selected phone number types (a comma-separated list, e.g. `--types mobile,fixed_line`). [See the list of all possible phone number types](https://github.com/catamphetamine/libphonenumber-js/blob/master/source/tools/generate.js#L6-L18).
</details>

####

<details>
<summary>Then use the generated <code>metadata.custom.json</code> file with the "core" functions.</summary>

####

Pass the `metadata` argument as the last one to the "core" functions.

In ES6 that would be:

```js
import {
  parsePhoneNumberFromString as _parsePhoneNumberFromString,
  findPhoneNumbersInText as _findPhoneNumbersInText,
  AsYouType as _AsYouType
} from 'libphonenumber-js/core'

import metadata from 'libphonenumber-js/metadata.full.json'

function call(func, _arguments) {
  var args = Array.prototype.slice.call(_arguments)
  args.push(metadata)
  return func.apply(this, args)
}

export function parsePhoneNumberFromString() {
  return call(_parsePhoneNumberFromString, arguments)
}

export function findPhoneNumbersInText() {
  return call(_findPhoneNumbersInText, arguments)
}

export function AsYouType(country) {
  return _AsYouType.call(this, country, metadata)
}
AsYouType.prototype = Object.create(_AsYouType.prototype, {})
AsYouType.prototype.constructor = AsYouType
```

And for [Common.js](https://auth0.com/blog/javascript-module-systems-showdown/) environment that would be:

```js
var core = require('libphonenumber-js/core')
var metadata = require('libphonenumber-js/metadata.full.json')

function call(func, _arguments) {
  var args = Array.prototype.slice.call(_arguments)
  args.push(metadata)
  return func.apply(this, args)
}

exports.parsePhoneNumberFromString = function parsePhoneNumberFromString() {
  return call(core.parsePhoneNumberFromString, arguments)
}

exports.findPhoneNumbersInText = function findPhoneNumbersInText() {
  return call(core.findPhoneNumbersInText, arguments)
}

exports.AsYouType = function AsYouType(country) {
  return core.AsYouType.call(this, country, metadata)
}
exports.AsYouType.prototype = Object.create(core.AsYouType.prototype, {})
exports.AsYouType.prototype.constructor = exports.AsYouType
```
</details>

####

<details>
<summary>Legacy: How to use the generated <code>metadata.custom.json</code> file with the legacy "custom" functions.</summary>

####

Pass the `metadata` argument as the last one to the "custom" functions.

In ES6 that would be:

```js
import {
  parseNumber,
  formatNumber,
  isValidNumber,
  getNumberType,
  AsYouType
} from 'libphonenumber-js/custom'

import metadata from 'libphonenumber-js/metadata.full.json'

parseNumber('+78005553535', metadata)
formatNumber({ phone: '8005553535', country: 'RU' }, metadata)
isValidNumber('+78005553535', metadata)
getNumberType('+78005553535', metadata)
new AsYouType('RU', metadata).input('+78005553535')
```

And for [Common.js](https://auth0.com/blog/javascript-module-systems-showdown/) environment that would be:

```js
var custom = require('libphonenumber-js/custom')
var metadata = require('libphonenumber-js/metadata.full.json')

exports.parseNumber = function parseNumber() {
  var parameters = Array.prototype.slice.call(arguments)
  parameters.push(metadata)
  return custom.parseNumber.apply(this, parameters)
}

exports.formatNumber = function formatNumber() {
  var parameters = Array.prototype.slice.call(arguments)
  parameters.push(metadata)
  return custom.formatNumber.apply(this, parameters)
}

exports.isValidNumber = function isValidNumber() {
  var parameters = Array.prototype.slice.call(arguments)
  parameters.push(metadata)
  return custom.isValidNumber.apply(this, parameters)
}

exports.getNumberType = function isValidNumber() {
  var parameters = Array.prototype.slice.call(arguments)
  parameters.push(metadata)
  return custom.getNumberType.apply(this, parameters)
}

exports.AsYouType = function AsYouType(country) {
  custom.AsYouType.call(this, country, metadata)
}

exports.AsYouType.prototype = Object.create(custom.AsYouType.prototype, {})
exports.AsYouType.prototype.constructor = exports.AsYouType
```
</details>

Metadata should be re-generated each time the project is being deployed because Google constantly updates their metadata.

<!-- ## To do -->

<!--
## Automatic metadata update setup

Create a daily (24 * 60 * 60) `launchd` job

http://alvinalexander.com/mac-os-x/mac-osx-startup-crontab-launchd-jobs

```sh
mkdir /Users/kuchumovn/work/libphonenumber-js-autoupdate

git clone https://github.com/catamphetamine/libphonenumber-js.git /Users/kuchumovn/work/libphonenumber-js-autoupdate

cd /Users/kuchumovn/work/libphonenumber-js-autoupdate

npm install

chmod u+x /Users/kuchumovn/work/libphonenumber-js-autoupdate/autoupdate.sh

nano ~/Library/LaunchAgents/com.github.catamphetamine.libphonenumber-js.metadata-update.plist

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
  <dict>
    <key>Label</key>
    <string>com.github.catamphetamine.libphonenumber-js.metadata-update</string>

    <key>ProgramArguments</key>
    <array>
      <string>/Users/kuchumovn/work/libphonenumber-js-autoupdate/autoupdate.sh</string>
    </array>

    <key>Nice</key>
    <integer>1</integer>

    <key>StartInterval</key>
    <integer>86400</integer>

    <key>RunAtLoad</key>
    <true/>

    <key>StandardErrorPath</key>
    <string>/tmp/libphonenumber.errors.txt</string>

    <key>StandardOutPath</key>
    <string>/tmp/libphonenumber.output.txt</string>
  </dict>
</plist>

launchctl load ~/Library/LaunchAgents/com.github.catamphetamine.libphonenumber-js.metadata-update.plist

launchctl list | grep 'libphonenumber-js'
```
-->

## Maintenance

Google periodically releases new metadata with the changes described in the [release notes](https://github.com/googlei18n/libphonenumber/blob/master/release_notes.txt). Sometimes those are minor non-breaking updates, sometimes those are major-version breaking updates. The metadata should be periodically updated via `autoupdate.cmd` (Windows) and `autoupdate.sh` (Linux/macOS) scripts. Also Google sometimes (very rarely) updates their code: [`phonenumberutil.js`](https://github.com/googlei18n/libphonenumber/blob/master/javascript/i18n/phonenumbers/phonenumberutil.js) (`parseNumber()`, `formatNumber()`, `isValidNumber()`, `getNumberType()`), [`asyoutypeformatter.js`](https://github.com/googlei18n/libphonenumber/blob/master/javascript/i18n/phonenumbers/asyoutypeformatter.js) (`AsYouType`), [`PhoneNumberMatcher`](https://github.com/googlei18n/libphonenumber/blob/master/java/libphonenumber/src/com/google/i18n/phonenumbers/PhoneNumberMatcher.java) (`findPhoneNumbersInText()`). The latest sync-up was performed on Jan 19th, 2020.

## Contributing

After cloning this repo, ensure dependencies are installed by running:

```sh
npm install
```

This module is written in ES6 and uses [Babel](http://babeljs.io/) for ES5
transpilation. Widely consumable JavaScript can be produced by running:

```sh
npm run build
```

Once `npm run build` has run, you may `import` or `require()` directly from
node.

After developing, the full test suite can be evaluated by running:

```sh
npm test
```

Test coverage must remain at 100%:

```sh
npm run test-coverage
```

When you're ready to test your new functionality on a real project, you can run

```sh
npm pack
```

It will `build`, `test` and then create a `.tgz` archive which you can then install in your project folder

```sh
npm install [module name with version].tar.gz
```

## Advertisement

If you're looking for an international "2 days ago" javascript solution then check out [`javascript-time-ago`](https://github.com/catamphetamine/javascript-time-ago).

## License

[MIT](LICENSE)