How to Extract Hostnames from URLs in JavaScript Without Regular Expressions?

Extracting Hostname without Regular Expressions

When extracting only the hostname from a URL, there are alternative methods to using regular expressions, especially if you are seeking a JavaScript/jQuery-based solution.

Consider the following solution:

var tmp = document.createElement('a');
tmp.href = "http://www.example.com/12xy45";

// tmp.hostname will now contain 'www.example.com'
// tmp.host will now contain hostname and port 'www.example.com:80'

You can wrap this in a function to modularize the hostname extraction:

function url_domain(data) {
  var a = document.createElement('a');
  a.href = data;
  return a.hostname;
}

This technique leverages the browser's built-in methods to parse URLs and retrieve the hostname component. It is both concise and effective, making it a suitable alternative to regular expressions for this specific task.

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