js如何获取a标签的参数

// 假设URL为 https://example.com/?name=John&age=30
const urlParams = new URLSearchParams(window.location.search);
const name = urlParams.get('name'); // "John"
const age = urlParams.get('age');   // "30"

function getQueryParams() {
    const params = {};
    const search = window.location.search.substring(1); // 去掉开头的问号
    const queryParams = search.split('&');

    queryParams.forEach(param => {
        const keyValue = param.split('=');
        const key = decodeURIComponent(keyValue[0]);
        const value = decodeURIComponent(keyValue[1] || '');
        params[key] = value;
    });

    return params;
}

// 使用示例
const params = getQueryParams();
console.log(params.name); // "John"
console.log(params.age);   // "30"

// 编码
const encodedParam = encodeURIComponent('John Doe');

// 解码
const decodedParam = decodeURIComponent(encodedParam);