Considering that the variable part will consist of letters, number and hyphen, replace (.*) with [a-z0-9\-]+ that you must solve.

Regex

This would be Regex: ((?:https|http|ftp)?:\/\/)?([^\/,\s]+\.[^\/,\s]+?)(?=\/|,|\s|$|\?|#)(.*) Where the demo on Regex101 can be viewed more closely.

Code

Regex101 Example

Return Group 2

const regex = /((?:https|http|ftp)?:\/\/)?([^\/,\s]+\.[^\/,\s]+?)(?=\/|,|\s|$|\?|#)(.*)/gm;
const str = 'http://dominio.do/strig-dinâmica-000-0000-000
https://www.olympikus.com.br/tenis-olympikus-flower-415-feminino-cinza-D22-1131-010
ftp://dominio.br/strig-dinâmica-000-0000-000
dominio.c/strig-dinâmica-000-0000-000';
const subst = '$2';

// The substituted value will be contained in the result variable
const result = str.replace(regex, subst);

console.log('Substitution result: ', result);

Example SOen

Code of a deleted user that can be seen here

In which returns the Integer String

var regex = /((?:https|http|ftp)?:\/\/)?([^\/,\s]+\.[^\/,\s]+?)(?=\/|,|\s|$|\?|#)(.*)/g;

var input = 'http://dominio.do/strig-dinâmica-000-0000-000
https://www.olympikus.com.br/tenis-olympikus-flower-415-feminino-cinza-D22-1131-010
ftp://dominio.br/strig-dinâmica-000-0000-000
dominio.c/strig-dinâmica-000-0000-000';

while (match = regex.exec(input)) {
    document.write(match[0] + "<br/>");
};

Debug

The Debuggex can be seen in the link and helps in understanding along with the demo in Regex101.

Explanation:

((?:https|http|ftp)?:\/\/)?([^\/,\s]+\.[^\/,\s]+?)(?=\/|,|\s|$|\?|#)(.*)

• 1st Capture Group - ((?:https|http|ftp)?:\/\/)?
  • Quantifier ? - Matches from zero to one, as many times as possible, returning as needed ( greedy )
  • Non-capture group - (?: Https | http | ftp)?
    • Quantifier ? - Matches from zero to one, as many times as possible, returning as needed ( greedy )
    • Alternatives - | are the options that are between the | separator, which acts as a boolean OR .
      • 1st Alternative - https matches the https characters literally
      • 2nd Alternative - http corresponds to http characters literally
      • 3rd Alternative - ftp matches ftp characters literally
    • : matches the character: literally
    • \ / matches the character / literally
• 2nd Capture Group - ([^\/,\s]+\.[^\/,\s]+?)
  • [^\/,\s]+ - Corresponds to a character not present in the set
    • Quantifier + - Matches between one and unlimited times, as many times as possible, returning as needed ( greedy )
    • \ / matches the character / literally
    • , matches the character, literally
    • \ s matches any white space character (equal to [\ r \ n \ t \ f \ v])
  • \. Matches the character. literally
  • [^\/,\s]+? - Corresponds to a character not present in the set
    • Quantifier +? - Matches between one and unlimited times, as few as possible, expanding as needed ( lazy )
    • \ / matches the character / literally
    • , matches the character, literally
    • \ s matches any white space character (equal to [\ r \ n \ t \ f \ v])
• Positive Lookahead (?=\/|,|\s|$|\?|#)
  • Alternatives - | are the options that are between the | separator, which acts as a boolean OR .
    • 1st alternative \ / matches the / literally
    • 2nd alternative , matches the character, literally
    • 3rd alternative \ s matches any white space character (equal to [\ r \ n \ t \ f \ v])
    • 4th alternative $ secures the position at the end of a line
    • 5th alternative \? matches the? literally
    • 6th alternative # matches the character # literally
• 3rd Capture Group - (.*)
  • . * matches any character (except for line terminators)
  • Quantifier * - Matches between zero and unlimited times, as many times as possible, returning as needed ( greedy )

  

The second group is what "matters", in which it has the   link information, or if you want to get the entire string, it would be group 0.