prepend-http 
Prepend
https://to humanized URLs likesindresorhus.comandlocalhost
Install
$ npm install prepend-http
Usage
const prependHttp = require('prepend-http');
prependHttp('sindresorhus.com');
//=> 'https://sindresorhus.com'
prependHttp('localhost', {https: false});
//=> 'http://localhost'
prependHttp('https://sindresorhus.com');
//=> 'https://sindresorhus.com'
API
prependHttp(url, [options])
url
Type: string
URL to prepend https:// to.
options
Type: object
https
Type: boolean
Default: true
Prepend https:// instead of http://.
License
MIT © Sindre Sorhus