Fetch Whois records using RDAP in javascript

fetch-whois.js

whois("example.com").then((response) => console.log(response));

async function fetchEndpoint(extension) {
    let endpoint;

    try {
        let response = await fetch("https://data.iana.org/rdap/dns.json");
        let data = await response.json();
        let services = data["services"];
        let service = services.find((s) => s[0].includes(extension));
        endpoint = service[1][0];
    } catch (e) { }

    return endpoint;
}

async function whois(domain) {
    let extension = domain.split(".").pop();
    // console.log(`Fetching whois of ${domain} (extension: ${extension})`);

    let endpoint = await fetchEndpoint(extension);
    let response = await fetch(`${endpoint}domain/${domain}`);
    let data = await response.json();

    return data;
}