taking off the http or https off a javascript string

Question

I have the following strings

http://example.com
https://example.com
http://www.example.com

how do i get rid of the http:// or

Answer 1

You may use URL() constructor. It will parse your url string and there will be an entry w/o protocol. So less headache with regexps:

let u = new URL('https://www.facebook.com/companypage/');
URL {
    hash: ""
    host: "www.facebook.com"
    hostname: "www.facebook.com"
    href: "https://www.facebook.com/companypage/"
    origin: "https://www.facebook.com"
    password: ""
    pathname: "/companypage/"
    port: ""
    protocol: "https:"
    search: ""
    searchParams: URLSearchParams {}
    username: ""
}
u.host // www.facebook.com
u.hostname // www.facebook.com

Although URL() drops out a protocol, it leaves you with www part. In my case I wanted to get rid of that subdomain part as well, so had to use to .replace() anyway.

u.host.replace(/^www./, '') // www.facebook.com => facebook.com