node根据网址获得域名

const url = require('url');

const urlString = 'https://www.example.com/path/to/resource?query=param';

// 解析URL
const parsedUrl = new URL(urlString);

// 获取域名
const domain = parsedUrl.hostname;

console.log(domain); // 输出: www.example.com

const url = require('url');

let urlString = 'www.example.com/path/to/resource?query=param';

// 手动添加协议
if (!urlString.startsWith('http://') && !urlString.startsWith('https://')) {
  urlString = 'http://' + urlString;
}

// 解析URL
const parsedUrl = new URL(urlString);

// 获取域名
const domain = parsedUrl.hostname;

console.log(domain); // 输出: www.example.com