regex-get-tld.js

const regex = /^(?:https?:\/\/w*\.?)?([a-zA-Z0-9\.\-_]+)(?:[\/.\-_a-zA-Z0-9]*)$/;
const str = `https://test.google.com/testdsadsa`;
let m;

if ((m = regex.exec(str)) !== null) {
    // The result can be accessed through the `m`-variable.
    m.forEach((match, groupIndex) => {
        console.log(`Found match, group ${groupIndex}: ${match}`);
    });
}