Creates an object containing the parameters of the current URL.
- Use 
String.prototype.match()with an appropriate regular expression to get all key-value pairs. - Use 
Array.prototype.reduce()to map and combine them into a single object. - Pass 
location.searchas the argument to apply to the currenturl. 
代码实现
const getURLParameters = url =>
  (url.match(/([^?=&]+)(=([^&]*))/g) || []).reduce(
    (a, v) => (
      (a[v.slice(0, v.indexOf('='))] = v.slice(v.indexOf('=') + 1)), a
    ),
    {}
  );
getURLParameters('google.com'); // {}
getURLParameters('http://url.com/page?name=Adam&surname=Smith');
// {name: 'Adam', surname: 'Smith'}