blocks|key|221791|text|这样如何：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|221792|window.location.hostname|code-block|syntax|javascript|221793|location对象实际上有一个指向number+of+attributes不同部分的URL|offset|length|style|CODE|221794|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.mozilla.org/en-US/docs/Web/API/Location#wikiArticle^0|0|0|0|8|I|K|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|W|8|@$I|X|J|Y|K|L]]|9|@$I|Z|J|10|1|11]]|A|$]]|$1|M|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|T]]]]

How about:

<pre><code>window.location.hostname
</code></pre>

The <code>location</code> object actually has a <a href="https://developer.mozilla.org/en-US/docs/Web/API/Location#wikiArticle" rel="noreferrer">number of attributes</a> referring to different parts of the URL

blocks|key|221958|text|让我们假设你有这个url路径：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|221959|http://localhost:4200/landing?query=1#2|offset|length|style|BOLD|221960|因此，您可以通过位置值为自己服务，如下所示：|221961|window.location.hash:+"#2"
​
window.location.host:+"localhost:4200"
​
window.location.hostname:+"localhost"
​
window.location.href:+"http://localhost:4200/landing?query=1#2"
​
window.location.origin:+"http://localhost:4200"
​
window.location.pathname:+"/landing"
​
window.location.port:+"4200"
​
window.location.protocol:+"http:"

window.location.search:+"?query=1"|code-block|syntax|javascript|221962|现在我们可以得出结论，你正在寻找：|221963|window.location.hostname|221964|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|13|0|13|0|0|8|3|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Z|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|10|8|@$D|11|E|12|F|G]]|9|@$D|13|E|14|1|15]]|A|$]]|$1|H|3|I|5|6|7|16|8|@$D|17|E|18|F|G]]|9|@]|A|$]]|$1|J|3|K|5|L|7|19|8|@]|9|@]|A|$M|N]]|$1|O|3|P|5|6|7|1A|8|@]|9|@]|A|$]]|$1|Q|3|R|5|L|7|1B|8|@]|9|@]|A|$M|N]]|$1|S|3|-4|5|6|7|1C|8|@]|9|@]|A|$]]]|T|$U|$5|V|W|X|A|$Y|C]]]]

Let's suppose you have this url path:
http://localhost:4200/landing?query=1#2
So, you can serve yourself by the location values, as follow:
<pre><code>window.location.hash: &quot;#2&quot;
​
window.location.host: &quot;localhost:4200&quot;
​
window.location.hostname: &quot;localhost&quot;
​
window.location.href: &quot;http://localhost:4200/landing?query=1#2&quot;
​
window.location.origin: &quot;http://localhost:4200&quot;
​
window.location.pathname: &quot;/landing&quot;
​
window.location.port: &quot;4200&quot;
​
window.location.protocol: &quot;http:&quot;

window.location.search: &quot;?query=1&quot;
</code></pre>
Now we can conclude you're looking for:
<pre><code>window.location.hostname
</code></pre>

blocks|key|218875|text|如果您对主机名(例如www.beta.example.com)不感兴趣，而是对域名(例如example.com)感兴趣，则这适用于有效的主机名：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|218876|function+getDomainName(hostName)
{
++++return+hostName.substring(hostName.lastIndexOf(".",+hostName.lastIndexOf(".")+-+1)+%2B+1);
}|code-block|syntax|javascript|218877|entityMap^0|A|K|18|B|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]|$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|S|8|@]|D|@]|E|$]]]|L|$]]

If you are not interested in the host name (for example <code>www.beta.example.com</code>) but in the domain name (for example <code>example.com</code>), this works for valid host names:

<pre><code>function getDomainName(hostName)
{
 return hostName.substring(hostName.lastIndexOf(".", hostName.lastIndexOf(".") - 1) + 1);
}
</code></pre>

blocks|key|3085998|text|function+getDomain(url,+subdomain)+{
++++subdomain+=+subdomain+%7C%7C+false;

++++url+=+url.replace(/(https?:\/\/)?(www.)?/i,+'');

++++if+(!subdomain)+{
++++++++url+=+url.split('.');

++++++++url+=+url.slice(url.length+-+2).join('.');
++++}

++++if+(url.indexOf('/')+!==+-1)+{
++++++++return+url.split('/')[0];
++++}

++++return+url;
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|3085999|示例|unstyled|offset|length|style|BOLD|3086000|3086001|getDomain('http://www.example.com')；//+example.com|unordered-list-item|3086002|getDomain('www.example.com')；//+example.com|3086003|getDomain('http://blog.example.com'，true)；//+blog.example.com|3086004|getDomain(location.href)；//+..|3086005|3086006|以前的版本是获取完整的域(包括子域)。现在，它根据首选项确定正确的域。因此，当第二个参数被提供为true时，它将包括子域，否则它只返回'main+domain‘|3086007|entityMap|0|LINK|mutability|MUTABLE|url|http://www.example.com/|1|http://blog.example.com/^0|0|0|2|0|0|B|M|0|0|0|B|N|1|0|0|0|0^^$0|@$1|2|3|4|5|6|7|17|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|18|8|@$G|19|H|1A|I|J]]|9|@]|A|$]]|$1|K|3|-4|5|F|7|1B|8|@]|9|@]|A|$]]|$1|L|3|M|5|N|7|1C|8|@]|9|@$G|1D|H|1E|1|1F]]|A|$]]|$1|O|3|P|5|N|7|1G|8|@]|9|@]|A|$]]|$1|Q|3|R|5|N|7|1H|8|@]|9|@$G|1I|H|1J|1|1K]]|A|$]]|$1|S|3|T|5|N|7|1L|8|@]|9|@]|A|$]]|$1|U|3|-4|5|F|7|1M|8|@]|9|@]|A|$]]|$1|V|3|W|5|F|7|1N|8|@]|9|@]|A|$]]|$1|X|3|-4|5|F|7|1O|8|@]|9|@]|A|$]]]|Y|$Z|$5|10|11|12|A|$13|14]]|15|$5|10|11|12|A|$13|16]]]]

<pre><code>function getDomain(url, subdomain) {
 subdomain = subdomain || false;

 url = url.replace(/(https?:\/\/)?(www.)?/i, '');

 if (!subdomain) {
 url = url.split('.');

 url = url.slice(url.length - 2).join('.');
 }

 if (url.indexOf('/') !== -1) {
 return url.split('/')[0];
 }

 return url;
}
</code></pre>

Examples

<ul>
<li>getDomain('<a href="http://www.example.com" rel="noreferrer">http://www.example.com</a>'); // example.com</li>
<li>getDomain('www.example.com'); // example.com</li>
<li>getDomain('<a href="http://blog.example.com" rel="noreferrer">http://blog.example.com</a>', true); // blog.example.com</li>
<li>getDomain(location.href); // ..</li>
</ul>

Previous version was getting full domain (including subdomain). Now it determines the right domain depending on preference. So that when a 2nd argument is provided as true it will include the subdomain, otherwise it returns only the 'main domain'

blocks|key|221896|text|你可以很容易地从Javascript中的location对象中获得它：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|221897|例如，此页面的URL为：|221898|http://www.stackoverflow.com/questions/11401897/get-the-current-domain-name-with-javascript-not-the-path-etc|code-block|syntax|javascript|221899|然后，我们可以获得具有location对象的以下属性的确切的域：|221900|location.host+=+"www.stackoverflow.com"
location.protocol=+"http:"|221901|您可以使用以下命令创建完整的域：|221902|location.protocol+%2B+"//"+%2B+location.host|221903|，在本例中返回http://www.stackoverflow.com|offset|length|style|CODE|221904|除此之外，我们还可以获得完整的URL以及location对象的其他属性的路径：|221905|location.href=+"http://www.stackoverflow.com/questions/11401897/get-the-current-domain-name-with-javascript-not-the-path-etc"++++
location.pathname=+"questions/11401897/get-the-current-domain-name-with-javascript-not-the-path-etc"|221906|entityMap^0|0|0|0|0|0|0|0|7|S|0|0|0^^$0|@$1|2|3|4|5|6|7|12|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|13|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|14|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|15|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|16|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|17|8|@]|9|@]|A|$]]|$1|O|3|P|5|F|7|18|8|@]|9|@]|A|$G|H]]|$1|Q|3|R|5|6|7|19|8|@$S|1A|T|1B|U|V]]|9|@]|A|$]]|$1|W|3|X|5|6|7|1C|8|@]|9|@]|A|$]]|$1|Y|3|Z|5|F|7|1D|8|@]|9|@]|A|$G|H]]|$1|10|3|-4|5|6|7|1E|8|@]|9|@]|A|$]]]|11|$]]

You can get it from location object in Javascript easily:

For example URL of this page is: 

<pre><code>http://www.stackoverflow.com/questions/11401897/get-the-current-domain-name-with-javascript-not-the-path-etc
</code></pre>

Then we can get the exact domain with following properties of location object:

<pre><code>location.host = "www.stackoverflow.com"
location.protocol= "http:"
</code></pre>

you can make the full domain with:

<pre><code>location.protocol + "//" + location.host
</code></pre>

Which in this example returns <code>http://www.stackoverflow.com</code> 

I addition of this we can get full URL and also the path with other properties of location object: 

<pre><code>location.href= "http://www.stackoverflow.com/questions/11401897/get-the-current-domain-name-with-javascript-not-the-path-etc" 
location.pathname= "questions/11401897/get-the-current-domain-name-with-javascript-not-the-path-etc"
</code></pre>

blocks|key|3085915|text|使用|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3085916|document.write(document.location.hostname)​|code-block|syntax|javascript|3085917|window.location有很多属性。有关它们的列表，请参阅here。|offset|length|style|CODE|3085918|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.mozilla.org/en/DOM/window.location^0|0|0|0|F|W|4|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|W|8|@$I|X|J|Y|K|L]]|9|@$I|Z|J|10|1|11]]|A|$]]|$1|M|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|T]]]]

Use

<pre><code>document.write(document.location.hostname)​
</code></pre>

<code>window.location</code> has a bunch of properties. See <a href="https://developer.mozilla.org/en/DOM/window.location" rel="noreferrer">here</a> for a list of them.

blocks|key|3085957|text|如果您只对域名感兴趣，而想要忽略子域，那么您需要从host和hostname中解析它。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3085958|下面的代码执行此操作：|3085959|var+firstDot+=+window.location.hostname.indexOf('.');
var+tld+=+".net";
var+isSubdomain+=+firstDot+<+window.location.hostname.indexOf(tld);
var+domain;

if+(isSubdomain)+{
++++domain+=+window.location.hostname.substring(firstDot+==+-1+?+0+:+firstDot+%2B+1);
}
else+{
++domain+=+window.location.hostname;
}|code-block|syntax|javascript|3085960|http://jsfiddle.net/5U366/4/|3085961|entityMap|0|LINK|mutability|MUTABLE|url^0|P|4|U|8|0|0|0|0|S|0|0^^$0|@$1|2|3|4|5|6|7|V|8|@$9|W|A|X|B|C]|$9|Y|A|Z|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|10|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|11|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|12|8|@]|D|@$9|13|A|14|1|15]]|E|$]]|$1|O|3|-4|5|6|7|16|8|@]|D|@]|E|$]]]|P|$Q|$5|R|S|T|E|$U|N]]]]

If you are only interested in the domain name and want to ignore the subdomain then you need to parse it out of <code>host</code> and <code>hostname</code>. 

The following code does this:

<pre><code>var firstDot = window.location.hostname.indexOf('.');
var tld = ".net";
var isSubdomain = firstDot &lt; window.location.hostname.indexOf(tld);
var domain;

if (isSubdomain) {
 domain = window.location.hostname.substring(firstDot == -1 ? 0 : firstDot + 1);
}
else {
 domain = window.location.hostname;
}
</code></pre>

<a href="http://jsfiddle.net/5U366/4/">http://jsfiddle.net/5U366/4/</a>

blocks|key|3086048|text|由于此问题要求输入域名，而不是主机名，因此正确答案应为|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3086049|window.location.hostname.split('.').slice(-2).join('.')|code-block|syntax|javascript|3086050|这也适用于像www.example.com这样的主机名。|offset|length|3086051|entityMap|0|LINK|mutability|MUTABLE|url|http://www.example.com/^0|0|0|6|F|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@$I|V|J|W|1|X]]|A|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

Since this question asks for domain name, not host name, a correct answer should be

<pre><code>window.location.hostname.split('.').slice(-2).join('.')
</code></pre>

This works for host names like <a href="http://www.example.com" rel="noreferrer">www.example.com</a> too.

blocks|key|218893|text|如果你想要一个完整的域名来源，你可以使用这个：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|218894|document.location.origin|code-block|syntax|javascript|218895|如果您只希望获得域，请使用can+just：|218896|document.location.hostname|218897|但您还有其他选择，请查看中的属性：|218898|document.location|218899|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|U|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

If you wish a full domain origin, you can use this:

<pre><code>document.location.origin
</code></pre>

And if you wish to get only the domain, use can you just this:

<pre><code>document.location.hostname
</code></pre>

But you have other options, take a look at the properties in:

<pre><code>document.location
</code></pre>

blocks|key|221921|text|如果您想在JavaScript中获取域名，只需使用以下代码：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|221922|var+domain_name+=+document.location.hostname;
alert(domain_name);|code-block|syntax|javascript|221923|如果您需要网页URL路径以便可以访问web+URL路径，请使用此示例：|221924|var+url+=+document.URL;
alert(url);|221925|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

If you want to get domain name in JavaScript, just use the following code:

<pre><code>var domain_name = document.location.hostname;
alert(domain_name);
</code></pre>

If you need to web page URL path so you can access web URL path use this example:

<pre><code>var url = document.URL;
alert(url);
</code></pre>

blocks|key|221938|text|这个函数怎么样？|type|unstyled|depth|inlineStyleRanges|entityRanges|data|221939|window.location.hostname.match(/\w*\.\w*$/gi)[0]|code-block|syntax|javascript|221940|这将只匹配域名，而不管它是子域还是主域|221941|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

What about this function? 

<pre><code>window.location.hostname.match(/\w*\.\w*$/gi)[0]
</code></pre>

This will match only the domain name regardless if its a subdomain or a main domain

blocks|key|3086273|text|window.location.hostname是一个很好的开始。但它包含子域，您可能想要删除这些子域。例如，如果主机名是www.example.com，您可能只需要example.com位。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3086274|一如既往，有一些角落案例让这件事变得很麻烦，例如bbc.co.uk。下面的正则表达式很适合我：|3086275|​|3086276|let+hostname+=+window.location.hostname;
//+remove+any+subdomains,+e.g.+www.example.com+->+example.com
let+domain+=+hostname.match(/%5E(?:.*?\.)?([a-zA-Z0-9\-_]{3,}\.(?:\w{2,8}%7C\w{2,4}\.\w{2,4}))$/)[1];
console.log("domain:+",+domain);|code-block|syntax|javascript|3086277|3086278|entityMap^0|0|O|1P|F|2B|B|0|O|9|0|0|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@$9|S|A|T|B|C]|$9|U|A|V|B|C]|$9|W|A|X|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|Y|8|@$9|Z|A|10|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|11|8|@]|D|@]|E|$]]|$1|J|3|K|5|L|7|12|8|@]|D|@]|E|$M|N]]|$1|O|3|I|5|6|7|13|8|@]|D|@]|E|$]]|$1|P|3|-4|5|6|7|14|8|@]|D|@]|E|$]]]|Q|$]]

<code>window.location.hostname</code> is a good start. But it includes sub-domains, which you probably want to remove. E.g. if the hostname is <code>www.example.com</code>, you probably want just the <code>example.com</code> bit.
There are, as ever, corner cases that make this fiddly, e.g. <code>bbc.co.uk</code>. The following regex works well for me:
<div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
<div class="snippet-code">
<pre class="snippet-code-js lang-js prettyprint-override"><code>let hostname = window.location.hostname;
// remove any subdomains, e.g. www.example.com -&gt; example.com
let domain = hostname.match(/^(?:.*?\.)?([a-zA-Z0-9\-_]{3,}\.(?:\w{2,8}|\w{2,4}\.\w{2,4}))$/)[1];
console.log("domain: ", domain);</code></pre>
</div>
</div>

blocks|key|222049|text|我想应该是这么简单的：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|222050|url.split("/")[2]|offset|length|style|CODE|222051|entityMap^0|0|0|H|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@$D|L|E|M|F|G]]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

I figure it ought to be as simple as this: 

<code>url.split("/")[2]</code>

blocks|key|222055|text|对我来说，最好的匹配是window.location.origin|type|unstyled|depth|inlineStyleRanges|entityRanges|data|222056|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

for my case the best match is window.location.origin

blocks|key|224005|text|综合以上几个答案，下面的方法对我来说非常适合销毁Cookie：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|224006|++/**
+++*+Utility+method+to+obtain+the+domain+URI:
+++*/
++fetchDomainURI()+{
++++if+(window.location.port.length+>+0)+{
++++++return+window.location.hostname;
++++}
++++return+`.${window.location.hostname.match(/\w*\.\w*$/gi)[0]}`;
++}|code-block|syntax|javascript|224007|适用于带端口的IP地址，例如0.0.0.0:8000等，以及复杂的域，如app.staging.example.com+returning+.example.com+=>允许跨域设置和销毁Cookie。|offset|length|style|CODE|224008|entityMap^0|0|0|10|N|1Y|C|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@$I|R|J|S|K|L]|$I|T|J|U|K|L]]|9|@]|A|$]]|$1|M|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|N|$]]

Combining a few answers from the above, the following works really well for me for destroying Cookies:

<pre><code> /**
 * Utility method to obtain the domain URI:
 */
 fetchDomainURI() {
 if (window.location.port.length &gt; 0) {
 return window.location.hostname;
 }
 return `.${window.location.hostname.match(/\w*\.\w*$/gi)[0]}`;
 }
</code></pre>

Works for IP addresses with ports, e.g., 0.0.0.0:8000 etc, as well as complex domains like <code>app.staging.example.com</code> returning <code>.example.com</code> => allows for cross-domain Cookie setting and destroying.

blocks|key|3086147|text|我是JavaScript的新手，但您不能直接使用:+document.domain吗？|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3086148|示例：|3086149|<p+id="ourdomain">

<script>
var+domainstring+=+document.domain;
document.getElementById("ourdomain").innerHTML+=+(domainstring);
</script>|code-block|syntax|javascript|3086150|输出：|3086151|domain.com|3086152|或|3086153|www.domain.com|3086154|这取决于您在网站上使用的内容。|3086155|entityMap^0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|V|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|W|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|X|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|Y|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|Z|8|@]|9|@]|A|$]]|$1|O|3|P|5|F|7|10|8|@]|9|@]|A|$G|H]]|$1|Q|3|R|5|6|7|11|8|@]|9|@]|A|$]]|$1|S|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|T|$]]

I'm new to JavaScript, but cant you just use: document.domain ?

Example:

<pre><code>&lt;p id="ourdomain"&gt;&lt;/p&gt;

&lt;script&gt;
var domainstring = document.domain;
document.getElementById("ourdomain").innerHTML = (domainstring);
&lt;/script&gt;
</code></pre>

Output:

<pre><code>domain.com
</code></pre>

or

<pre><code>www.domain.com
</code></pre>

Depending on what you use on your website.

blocks|key|2872570|text|即使问题是关于域名的，接受的解决方案也包括子域(例如，你让blog.example.com调用location.hostname)。为了将来的参考，我建议使用一行代码来仅提取域(例如，https://blog.example.com/index.html+->+example.com)作为迈克尔.|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2872571|location.hostname.split('.').filter((+_,+i)+=>+i+<+2).join('.')|code-block|syntax|javascript|2872572|当心！当TLD由两部分组成时，它可能会中断。.co.uk)。如果这是您的情况，请在上面的代码中将2改为3。|2872573|entityMap^0|T|G|1B|H|2K|Z|3N|B|0|0|M|6|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]|$9|R|A|S|B|C]|$9|T|A|U|B|C]|$9|V|A|W|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|X|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|Y|8|@$9|Z|A|10|B|C]]|D|@]|E|$]]|$1|M|3|-4|5|6|7|11|8|@]|D|@]|E|$]]]|N|$]]

Even if the question is about the domain name, the accepted solution includes the subdomain (eg. you get <code>blog.example.com</code> calling <code>location.hostname</code>).
For future reference I suggest a one-liner to extract only the domain (eg. <code>https://blog.example.com/index.html</code> -&gt; <code>example.com</code>) as Micheal.
<pre><code>location.hostname.split('.').filter(( _, i) =&gt; i &lt; 2).join('.')
</code></pre>
Beware! It can break when the TLD is composed of two parts (eg. <code>.co.uk</code>). If that's your case change 2 with 3 in the code above.

blocks|key|2872613|text|https://publicsuffix.org/list/|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2872614|(https://github.com/publicsuffix/list/blob/master/public_suffix_list.dat)|2872615|需要正确地解析出所有没有后缀的域，使用上面答案中的点永远不会完全正确。可以针对公共后缀dat文件运行上面的代码示例来实现这一点。|2872616|您可以在此基础上编写自己的代码，也可以使用https://www.npmjs.com/package/tldts之类的包|2872617|getDomainWithoutSuffix('google.com');++++++++//+returns+`google`
getDomainWithoutSuffix('fr.google.com');+++++//+returns+`google`
getDomainWithoutSuffix('fr.google.google');++//+returns+`google`
getDomainWithoutSuffix('foo.google.co.uk');++//+returns+`google`
getDomainWithoutSuffix('t.co');++++++++++++++//+returns+`t`
getDomainWithoutSuffix('fr.t.co');+++++++++++//+returns+`t`
getDomainWithoutSuffix('https://user:password@example.co.uk:8080/some/path?and&query#hash');+//+returns+`example`|code-block|syntax|javascript|2872618|entityMap|0|LINK|mutability|MUTABLE|url|1|https://github.com/publicsuffix/list/blob/master/public_suffix_list.dat|2|https://www.npmjs.com/package/tldts^0|0|U|0|0|1|1Z|1|0|0|L|Z|2|0|0^^$0|@$1|2|3|4|5|6|7|Z|8|@]|9|@$A|10|B|11|1|12]]|C|$]]|$1|D|3|E|5|6|7|13|8|@]|9|@$A|14|B|15|1|16]]|C|$]]|$1|F|3|G|5|6|7|17|8|@]|9|@]|C|$]]|$1|H|3|I|5|6|7|18|8|@]|9|@$A|19|B|1A|1|1B]]|C|$]]|$1|J|3|K|5|L|7|1C|8|@]|9|@]|C|$M|N]]|$1|O|3|-4|5|6|7|1D|8|@]|9|@]|C|$]]]|P|$Q|$5|R|S|T|C|$U|4]]|V|$5|R|S|T|C|$U|W]]|X|$5|R|S|T|C|$U|Y]]]]

<a href="https://publicsuffix.org/list/" rel="nofollow noreferrer">https://publicsuffix.org/list/</a>
(<a href="https://github.com/publicsuffix/list/blob/master/public_suffix_list.dat" rel="nofollow noreferrer">https://github.com/publicsuffix/list/blob/master/public_suffix_list.dat</a>)
is needed to correctly parse out all domains without suffixes, working with dots as in the answers above will never completely be correct. Feel free to run the above codes samples against the public suffixes dat file to realize this.
You can roll your own code based on this or use a package like <a href="https://www.npmjs.com/package/tldts" rel="nofollow noreferrer">https://www.npmjs.com/package/tldts</a>
<pre><code>getDomainWithoutSuffix('google.com'); // returns `google`
getDomainWithoutSuffix('fr.google.com'); // returns `google`
getDomainWithoutSuffix('fr.google.google'); // returns `google`
getDomainWithoutSuffix('foo.google.co.uk'); // returns `google`
getDomainWithoutSuffix('t.co'); // returns `t`
getDomainWithoutSuffix('fr.t.co'); // returns `t`
getDomainWithoutSuffix('https://user:password@example.co.uk:8080/some/path?and&amp;query#hash'); // returns `example`
</code></pre>

blocks|key|3086207|text|欢迎访问我们的“href="javascript:document.location.href=document.location.origin%2B'/contact-us'"+title=”单击联系我们“class="coded_link”>联系人“链接|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3086208|Indeed+worked+for+me+whereas+I+couldn't+use+PHP|3086209|Just+tested+that+it+worked+thanks+to+the+approach+mentioned+above+in+some+of+the+answers,+so+quick+and+verified+that+worked|3086210|entityMap|0|LINK|mutability|MUTABLE|url|1|https://i.stack.imgur.com/zWYSu.png|2|https://i.stack.imgur.com/1i2fg.png^0|8|3B|0|0|0|1B|1|0|0|3F|2|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@$A|T|B|U|1|V]]|C|$]]|$1|D|3|E|5|6|7|W|8|@]|9|@$A|X|B|Y|1|Z]]|C|$]]|$1|F|3|G|5|6|7|10|8|@]|9|@$A|11|B|12|1|13]]|C|$]]|$1|H|3|-4|5|6|7|14|8|@]|9|@]|C|$]]]|I|$J|$5|K|L|M|C|$N|-4]]|O|$5|K|L|M|C|$N|P]]|Q|$5|K|L|M|C|$N|R]]]]

Feel free to visit our “&lt;a <code>href=&quot;javascript:document.location.href=document.location.origin+'/contact-us'&quot;</code> title=&quot;Click to Contact Us&quot; class=&quot;coded_link&quot; &gt;Contact” link
<a href="https://i.stack.imgur.com/zWYSu.png" rel="nofollow noreferrer">Indeed worked for me whereas I couldn't use PHP</a>
<a href="https://i.stack.imgur.com/1i2fg.png" rel="nofollow noreferrer">Just tested that it worked thanks to the approach mentioned above in some of the answers, so quick and verified that worked</a>

I plan on buying two domain names for the same site. Depending on which domain is used I plan on providing slightly different data on the page. Is there a way for me to detect the actual domain name that the page is loading from so that I know what to change my content to?

I've looked around for stuff like this but most of it doesn't work the way I want it to.

For instance when using

<pre><code>document.write(document.location)
</code></pre>

on <a href="http://jsfiddle.net/LSAP5/" rel="noreferrer">JSFiddle</a> it returns

<blockquote>
 <code>http://fiddle.jshell.net/_display/</code>
</blockquote>

i.e. the actual path or whatever that is.

Get The Current Domain Name With Javascript (Not the path, etc.)

我计划购买同一网站的两个域名。根据使用的域，我计划在页面上提供略有不同的数据。有没有一种方法可以让我检测到页面加载的实际域名，以便我知道要将内容更改为什么？我到处寻找这样的东西，但大部分都不是我想要的方式。例如，当使用document.write(document.location)在上，它返回 http://fiddle.jshell.net/_display/即实际路径或其他任何内容。

问使用Javascript获取当前域名(不是路径等)
EN

回答 19

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