javascript - 如何从JavaScript中的字符串中提取基本URL？(How to extract base URL from a string in JavaScript?)

Question

I'm trying to find a relatively easy and reliable method to extract the base URL from a string variable using JavaScript (or jQuery).

(我正在尝试找到一种相对简单可靠的方法，使用JavaScript（或jQuery）从字符串变量中提取基本URL。)

For example, given something like:

(例如，给出如下内容：)

http://www.sitename.com/article/2009/09/14/this-is-an-article/

I'd like to get:

(我想得到：)

http://www.sitename.com/

Is a regular expression the best bet?

(正则表达式是最好的选择吗？)

If so, what statement could I use to assign the base URL extracted from a given string to a new variable?

(如果是这样，我可以使用什么语句将从给定字符串中提取的基本URL分配给新变量？)

I've done some searching on this, but everything I find in the JavaScript world seems to revolve around gathering this information from the actual document URL using location.host or similar.

(我已经对此进行了一些搜索，但我在JavaScript世界中找到的所有内容似乎都围绕着使用location.host或类似方法从实际文档URL收集此信息。)

  ask by Bungle translate from so

Answer 1

Edit: Some complain that it doesn't take into account protocol.

(编辑：有人抱怨它没有考虑协议。)

So I decided to upgrade the code, since it is marked as answer.

(所以我决定升级代码，因为它被标记为答案。)

For those who like one-line-code... well sorry this why we use code minimizers, code should be human readable and this way is better... in my opinion.

(对于那些喜欢单行代码的人...很抱歉这就是为什么我们使用代码最小化，代码应该是人类可读的，这种方式更好......在我看来。)

var pathArray = "https://somedomain.com".split( '/' );
var protocol = pathArray[0];
var host = pathArray[2];
var url = protocol + '//' + host;

Or use Davids solution from below.

(或者从下面使用Davids解决方案 。)