获取一级域名

function getTopLevelDomain() {
    const url = window.location.href;
    const domain = new URL(url).hostname;
    const topLevelDomain = domain.split('.').slice(-2).join('.');
    return topLevelDomain;
}

console.log(getTopLevelDomain()); // 输出: example.com

from urllib.parse import urlparse

def get_top_level_domain(url):
    parsed_url = urlparse(url)
    domain_parts = parsed_url.netloc.split('.')
    top_level_domain = '.'.join(domain_parts[-2:])
    return top_level_domain

print(get_top_level_domain('https://www.example.com/path'))  # 输出: example.com

const url = require('url');

function getTopLevelDomain(urlString) {
    const parsedUrl = new url.URL(urlString);
    const domainParts = parsedUrl.hostname.split('.');
    const topLevelDomain = domainParts.slice(-2).join('.');
    return topLevelDomain;
}

console.log(getTopLevelDomain('https://www.example.com/path'));  // 输出: example.com

function getTopLevelDomain(url) {
    const domain = new URL(url).hostname;
    const topLevelDomain = domain.match(/[^.]+\.[^.]+$/)[0];
    return topLevelDomain;
}

console.log(getTopLevelDomain('https://subdomain.example.com/path'));  // 输出: example.com