关于JavaScript中URL对象的一些妙用

// 假设当前的 url 为 'https://www.test.com?a=1&b=2'
const b = new URLSearchParams(location.search);
const aParam = b.get('a'); // 1
const bParam = b.get('b'); // 2
const entries = [...b];
// [['a', '1'], ['b', '2']]
// 如果希望可以像 qs.parse 一样获取一个对象，可以这样做
const params = Object.fromEntries(entries);
// {a: 'c', b: '2'}

const a = new URL('https://www.test.com?a=1&b=2');
// hash: ""
// host: "www.test.com"
// hostname: "www.test.com"
// href: "https://www.test.com/?a=1b=2"
// origin: "https://www.test.com"
// password: ""
// pathname: "/"
// port: ""
// protocol: "https:"
// search: "?a=1&b=2"
// searchParams: URLSearchParams {}
// username: ""
// [[Prototype]]: URL

const a = new URL('https://www.test.com?a=1&b=2');
const entries = [...a.searchParmas];
const params = Object.fromEntries(entries);

// 在浏览器控制台，一行
[...new URL(location.href).searchParams];

const a = new URL('https://www.test.com?a=1&b=2');
a.searchParams.set('a', '18');
a.searchParams.set('b', '14');
a.searchParams.set('c', 'test');
let newURL = a.toString(); // https://www.test.com/?a=18&b=14&c=test
a.hash = 'hasha';
newURL = a.toString(); // 'https://www.test.com/?a=18&b=14&c=test#hasha'
a.host = 'www.init.com';
newURL = a.toString(); // https://www.init.com/?a=18&b=14&c=test#hasha