JavaScript - string regex backreferences

Question

You can backreference like this in JavaScript:

var str = \"123 $test 123\";
str = str.replace(/(\\$)([a-z]+)/gi, \"$2\");

This would (quite

Answer 1

Using ESNext, quite a dummy links replacer but just to show-case how it works :

let text = 'Visit http://lovecats.com/new-posts/ and https://lovedogs.com/best-dogs NOW !';

text = text.replace(/(https?:\/\/[^ ]+)/g, (match, link) => {
  // remove ending slash if there is one
  link = link.replace(/\/?$/, '');
  
  return `${link.substr(link.lastIndexOf('/') +1)}`;
});

document.body.innerHTML = text;