@stdlib/assert-is-domain-name NPM

isDomainName

Test if a value is a domain name.

Installation

npm install @stdlib/assert-is-domain-name

Usage

var isDomainName = require( '@stdlib/assert-is-domain-name' );

isDomainName( value )

Tests if a value is a domain name.

var bool = isDomainName( 'example.com' );
// returns true

bool = isDomainName( 'foo@bar.com' );
// returns false

Notes

Validation adheres to RFC 2181, which defines the syntax for domain names and stipulates that domain names must be 255 characters or less.

Examples

var isDomainName = require( '@stdlib/assert-is-domain-name' );

var bool = isDomainName( 'www.example.com' );
// returns true

bool = isDomainName( 'foo@bar.com' );
// returns false

bool = isDomainName( 'beep boop' );
// returns false

bool = isDomainName( null );
// returns false

bool = isDomainName( 5.0 );
// returns false

Notice

This package is part of stdlib, a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.

For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.