通过 reduce 获取 URL参数

const getUrlParams = url => url.match(/([^?=&]+)(=([^&]*))/g).reduce((a, v) => (a[v.slice(0, v.indexOf('='))] = v.slice(v.indexOf('=') + 1), a), {});

// getUrlParameters('http://api.com/relation?userIds=1,2,3&userType=student')