查看 MDN文章关于 window.location 。

QueryString在窗口中可用.location.search 。

The QueryString is available in window.location.search.

在旧版浏览器中也可以使用的解决方案

MDN提供了一个示例（在上面引用的文章中不再提供）如何获取QueryString中可用的单个键的get值。这样的事情：

MDN provide an example (no longer available in the above referenced article) of how to the get value of a single key available in the QueryString. Something like this:

function getQueryStringValue (key) {  
  return decodeURIComponent(window.location.search.replace(new RegExp("^(?:.*[&\\?]" + encodeURIComponent(key).replace(/[\.\+\*]/g, "\\$&") + "(?:\\=([^&]*))?)?.*$", "i"), "$1"));  
}  

// Would write the value of the QueryString-variable called name to the console  
console.log(getQueryStringValue("name")); 

在现代浏览器中

在现代浏览器中，您有 searchParams 属性，返回 URLSearchParams 对象。返回的对象有许多方便的方法，包括get-method。所以上面例子的等价物是：

In modern browsers you have the searchParams property of the URL interface, which returns a URLSearchParams object. The returned object has a number of convenient methods, including a get-method. So the equivalent of the above example would be:

let params = (new URL(document.location)).searchParams;
let name = params.get("name");

URLSearchParams 接口也可用于解析查询字符串格式的字符串，并将它们转换为方便的URLSearchParams对象。

The URLSearchParams interface can also be used to parse strings in a querystring format, and turn them into a handy URLSearchParams object.

let paramsString = "name=foo&age=1337"
let searchParams = new URLSearchParams(paramsString);

searchParams.has("name") === true; // true
searchParams.get("age") === "1337"; // true

请注意，此界面的浏览器支持仍然有限，所以如果你需要支持旧版浏览器，坚持使用第一个示例或使用 polyfill 。