A tiny (171B) utility to check if a hostname is local
npm install local-hostname> A tiny (171B) utility to check if a hostname is local
Compares an incoming URL hostname segment against a manually constructed RegExp pattern.
The pattern supports IPV4 and IPV6 addresses and is derived from RFC1918 – see Wikipedia explainer.
This module supports browser and Node.js environments.
It is made available in three formats:
* CommonJS: dist/localhost.js
* ES Module: dist/localhost.mjs
* UMD: dist/localhost.min.js
``
$ npm install --save local-hostname
`js
import localhost from 'local-hostname';
localhost('localhost'); //=> true
localhost('127.0.254.1'); //=> true
localhost('hello.localhost'); //=> true
localhost('192.168.0.1'); //=> true
localhost('localhost.123'); //=> false
localhost('192.167.100.300'); //=> false
localhost('168.254.1.255'); //=> false
localhost('example.com'); //=> false
`
#### hostname
Type:
The
segment of a valid URL.
> Important: The localhost function does not parse or format the URL for you!Contributing
PRs are welcome, of course! However, please open an issue first to discuss the planned changes :)
I am _by no stretch of the imagination_ a networking expert – I most likely missed cases and/or ranges.
To change the
RegExp pattern, modify or add the segment(s) inside src/build.js, run it with node, and then paste the result into the src/index.js` file.MIT © Luke Edwards