js 截取url问号后面

let url = new URL('https://example.com?foo=bar&baz=qux');
let params = new URLSearchParams(url.search);
console.log(params.get('foo')); // 输出: bar

function getQueryString(url) {
    let queryString = url.split('?')[1];
    if (!queryString) return {};
    let queryParams = queryString.split('&');
    let result = {};
    queryParams.forEach(param => {
        let [key, value] = param.split('=');
        result[key] = decodeURIComponent(value);
    });
    return result;
}

let url = 'https://example.com?foo=bar&baz=qux';
console.log(getQueryString(url)); // 输出: { foo: 'bar', baz: 'qux' }

let encodedParam = encodeURIComponent('中文');
let url = `https://example.com?param=${encodedParam}`;
let decodedParam = decodeURIComponent(new URL(url).searchParams.get('param'));
console.log(decodedParam); // 输出: 中文