js url截取

const urlString = 'https://www.example.com/path/to/resource?key=value#anchor';

// 创建URL对象
const url = new URL(urlString);

// 获取协议
console.log(url.protocol); // 输出: "https:"

// 获取主机名
console.log(url.hostname); // 输出: "www.example.com"

// 获取路径名
console.log(url.pathname); // 输出: "/path/to/resource"

// 获取查询字符串
console.log(url.search); // 输出: "?key=value"

// 获取特定查询参数
const params = new URLSearchParams(url.search);
console.log(params.get('key')); // 输出: "value"

const urlString = 'https://www.example.com/path/to/resource?key=value#anchor';

// 截取协议
const protocol = urlString.split('://')[0];
console.log(protocol); // 输出: "https"

// 截取主机名和路径后部分
const hostAndPath = urlString.split('://')[1];
const host = hostAndPath.split('/')[0];
console.log(host); // 输出: "www.example.com"

// 截取路径
const path = '/' + hostAndPath.split('/').slice(1, -1).join('/');
console.log(path); // 输出: "/path/to"

// 截取查询字符串
const query = urlString.split('?')[1].split('#')[0];
console.log(query); // 输出: "key=value"