正如已经提到的，有一个尚未完全支持的window.location.origin，但不是使用它或创建一个新变量来使用，我更喜欢检查它，如果它没有设置为设置它。

例如;

if (!window.location.origin) {
  window.location.origin = window.location.protocol + "//" + window.location.hostname + (window.location.port ? ':' + window.location.port: '');
}

实际上我在几个月前写过关于window.location.origin的修复

尝试使用正则表达式(Regex)，当你想要验证/提取东西或甚至用javascript做一些简单的解析时，它将非常有用。

正则表达式是:

/([a-zA-Z]+):\/\/([\-\w\.]+)(?:\:(\d{0,5}))?/

演示:

function breakURL(url){

     matches = /([a-zA-Z]+):\/\/([\-\w\.]+)(?:\:(\d{0,5}))?/.exec(url);

     foo = new Array();

     if(matches){
          for( i = 1; i < matches.length ; i++){ foo.push(matches[i]); }
     }

     return foo
}

url = "https://www.google.co.uk:55699/search?q=http%3A%2F%2F&oq=http%3A%2F%2F&aqs=chrome..69i57j69i60l3j69i65l2.2342j0j4&sourceid=chrome&ie=UTF-8"


breakURL(url);       // [https, www.google.co.uk, 55699] 
breakURL();          // []
breakURL("asf");     // []
breakURL("asd://");  // []
breakURL("asd://a"); // [asd, a, undefined]

现在你也可以进行验证了。

以下是我使用的解决方案:

const result = `${ window.location.protocol }//${ window.location.host }`;

编辑:

要增加跨浏览器兼容性，请使用以下方法:

const result = `${ window.location.protocol }//${ window.location.hostname + (window.location.port ? ':' + window.location.port: '') }`;

适用于所有浏览器的简单答案:

let origin;

if (!window.location.origin) {
  origin = window.location.protocol + "//" + window.location.hostname + 
     (window.location.port ? ':' + window.location.port: '');
}

origin = window.location.origin;

console.log(`${req.protocol}://${req.get('host')}/${req.originalUrl}`);

要求的事情。protocol -给出你使用的协议(例如HTTP) get(host) -给出带有端口号的主机名(例如localhost:8080)

ES6风格，具有可配置参数。

/**
 * Get the current URL from `window` context object.
 * Will return the fully qualified URL if neccessary:
 *   getCurrentBaseURL(true, false) // `http://localhost/` - `https://localhost:3000/`
 *   getCurrentBaseURL(true, true) // `http://www.example.com` - `https://www.example.com:8080`
 *   getCurrentBaseURL(false, true) // `www.example.com` - `localhost:3000`
 *
 * @param {boolean} [includeProtocol=true]
 * @param {boolean} [removeTrailingSlash=false]
 * @returns {string} The current base URL.
 */
export const getCurrentBaseURL = (includeProtocol = true, removeTrailingSlash = false) => {
  if (!window || !window.location || !window.location.hostname || !window.location.protocol) {
    console.error(
      `The getCurrentBaseURL function must be called from a context in which window object exists. Yet, window is ${window}`,
      [window, window.location, window.location.hostname, window.location.protocol],
    )
    throw new TypeError('Whole or part of window is not defined.')
  }

  const URL = `${includeProtocol ? `${window.location.protocol}//` : ''}${window.location.hostname}${
    window.location.port ? `:${window.location.port}` : ''
  }${removeTrailingSlash ? '' : '/'}`

  // console.log(`The URL is ${URL}`)

  return URL
}