How to remove the tld with regexp

JavaScript
1

I have this

// Raw
window.onload = function() {
  
  var str = "https://www.mailchimp.com";
// if str is C:\windows\file system\path\picture name.jpg
alert( str.split('w.').pop().replace(".com","") );
  display("Input: " + str);
  display("Found: " + m);
  
  function display(msg) {
    var p = document.createElement('p');
    p.innerHTML = msg;
    document.body.appendChild(p);
  }
};

Is only replace text end if it is .com. How can select from all char replace? Not depands on what value?

Thanks!

2

I’m not sure what are you trying to achieve here, really. Do you want to extract domain name from URL without TLD? So

f('https://www.mailchimp.com') // => maichimp
f('https://google.com/about') // => google

If yes, I’m afraid you’re largely underestimating complexity of this task, like a lot!
Consider following valid URLs:

http://example.com/path/to/page?name=ferret&color=purple
https://192.134.34.0:3000/
http://news.com.uk
https://bbc.uk
...

If you still decided to do it, you need to do following steps:

  1. Reliably extract hostname, like so:
function extractHostName(url) {
  return new URL(url).hostname;
}
  1. Have JSON of all possible TLD, so you can detect and eliminate TLD, like so:
function extractDomain(hostname) {
  const tld = JSON.parse(tld.json); // should be in a form of array
  const re = new RegExp(`(${tld.join('|').replace('.', '\\.')})$`);
  return hostname
    .replace(re, '')
    .replace(/\.$/, '')
    .replace(/^(\w+\.)*/, '');
}

You can grab JSON of all TLD here: https://datahub.io/core/top-level-domain-names
NOTE: they are not in array format, so you’ll have to re-format

But honestly, I would just drop this idea :slight_smile: