js获取地址栏的id参数

// 获取当前URL
const currentUrl = new URL(window.location.href);

// 使用URLSearchParams获取id参数
const idParam = currentUrl.searchParams.get('id');

console.log(idParam); // 输出: 123 (假设URL是 http://example.com/?id=123)

function getQueryParam(param) {
    const queryString = window.location.search.substring(1); // 去掉开头的'?'
    const params = queryString.split('&');
    for (let i = 0; i < params.length; i++) {
        const pair = params[i].split('=');
        if (decodeURIComponent(pair[0]) === param) {
            return decodeURIComponent(pair[1]);
        }
    }
    return null;
}

const idParam = getQueryParam('id');
console.log(idParam); // 输出: 123 (假设URL是 http://example.com/?id=123)