使用jquery从存储在变量中的url获取域名？

Question

$url = 'http://hostname.com/folder/folder2/test.php?id=243432432424243';

从上面的变量我可以如下：

$finalUrl = 'http://hostname.com';

如果是，请回答此问题。

Answer 1

function getBaseURL() {
    var url = location.href;  // entire url including querystring - also: window.location.href;
    var baseURL = url.substring(0, url.indexOf('/', 14));
    if (baseURL.indexOf('http://localhost') != -1) {
        // Base Url for localhost
        var url = location.href;  // window.location.href;
        var pathname = location.pathname;  // window.location.pathname;
        var index1 = url.indexOf(pathname);
        var index2 = url.indexOf("/", index1 + 1);
        var baseLocalUrl = url.substr(0, index2);
        return baseLocalUrl + "/";
    }
    else {
        // Root Url for domain name
        return baseURL + "/";
    }

}

Answer 2

var $url = 'http://hostname.com/folder/folder2/test.php?id=243432432424243';

var a = document.createElement('a');
a.href = $url;

var $finalUrl = a.protocol + '//' + a.hostname;