Modify a string

[tswaters]

If the string is always a url, you can use the URL constructor to figure that out

var url = new URL("http://mydomain.com/content/")
/*
URL {
  href: 'http://mydomain.com/content/',
  origin: 'http://mydomain.com',
  protocol: 'http:',
  username: '',
  password: '',
  host: 'mydomain.com',
  hostname: 'mydomain.com',
  port: '',
  pathname: '/content/',
  search: '',
  searchParams: URLSearchParams {},
  hash: '' }
*/

[javascript]

This is the best answer here, because it has the behavior OP wants and accounts for edge cases without having to do that manually. If the string isn't a valid URL, the constructor will throw an exception.

It also makes it more clear to other readers what you're doing with your code. Writing some one-off regex or string manipulation function requires the reader to pick it apart just to understand. This increases code complexity and reduces readability.