使用前牢记窗口和位置

1.在客户端渲染中使用窗口和位置(注意:不在ssr中使用)

window.location.host; 

or

var host = window.location.protocol + "//" + window.location.host;

2.服务器端渲染

如果你使用nuext .js(vue)或next.js(react)，请参考文档

对于nuxt js框架

req.headers.host

代码:

async asyncData ({ req, res }) {
        if (process.server) {
         return { host: req.headers.host }
        }

路由器代码:

export function createRouter (ssrContext) {



console.log(ssrContext.req.headers.host)   
      return new Router({
        middleware: 'route',
        routes:checkRoute(ssrContext),
        mode: 'history'
      })
    }

对于next.js框架

Home.getInitalProps = async(context) => {
   const { req, query, res, asPath, pathname } = context;
   if (req) {
      let host = req.headers.host // will give you localhost:3000
     }
  }

对于node.js用户

var os = require("os");
var hostname = os.hostname();

or

request.headers.host

对于laravel用户

public function yourControllerFun(Request $request) {

    $host = $request->getHttpHost();

  

    dd($host);

}

or

直接在web.php中使用

Request::getHost();

注意:

您手动检查CSR和SSR应用程序 例子 ssr渲染

if(req.server){
host=req.host;
}
if(req.client){
host=window.location.host; 
}

要获取主机名:location.hostname

但你的例子也在寻找方案，也就是位置。在Chrome中，origin似乎可以做你想做的事情，但在Mozdev文档中却没有提及。你可以用

location.protocol + '//' + location.hostname

如果你也想要端口号(当它不是80时)，那么:

location.protocol + '//' + location.host

我喜欢这个，取决于目的

window.location.href.split("/")[2] == "localhost:17000" //always domain + port

你可以在任何url字符串上应用它

var url = "http://localhost:17000/sub1/sub2/mypage.html?q=12";
url.split("/")[2] == "localhost:17000"
url.split("/")[url.split("/").length-1] == "mypage.html?q=12"

从url-string(相对路径)中删除协议，域和路径

var arr = url.split("/");
if (arr.length>3)
   "/" + arr.splice(3, arr.length).join("/") == "/sub1/sub2/mypage.html?q=12"

你可以尝试这样做:

1. Get the full URL:

     window.location

2. Get the only protocol:

    window.location.protocol

3. Get the host:

    window.location.host

4. Get the host and protocol:

    window.location.origin

5. Get pathname or directory without protocol and host:

    var url = 'http://www.example.com/somepath/path2/path3/path4';
    
    var pathname = new URL(url).pathname;
    
    alert(pathname); 

// will return the host name and port
var host = window.location.host; 

或可能

var host = window.location.protocol + "//" + window.location.host;

或者如果你喜欢串联

var protocol = location.protocol;
var slashes = protocol.concat("//");
var host = slashes.concat(window.location.host);

// or as you probably should do
var host = location.protocol.concat("//").concat(window.location.host);

// the above is the same as origin, e.g. "https://stackoverflow.com"
var host = window.location.origin;

如果您有或期望自定义端口，请使用window.location.host而不是window.location.hostname

这应该可以工作:

window.location.hostname