获取url指定key对应的值

location.js

// url = 'https://www.baidu.com/s?wd=%E6%96%B0%E5%9E%A3%E7%BB%93%E8%A1%A3'
var urlParams = function (key) {
  var ret = location.search.match(new RegExp('(\\?|&)' + key + '=(.*?)(&|$)'))
  return ret && decodeURIComponent(ret[2])
}
urlParams('wd'); // '新垣结衣'


/**
 * removeParam 删除 URL 中指定参数
 * @param {name} 参数名
 * @param {url} 指定 URL，可选。默认当前地址 location.href
 */
export const removeParam = (name, url) => {
  if (typeof name !== 'string') return false;
  if (!url) url = window.location.href;
  var urlparts = url.split('?');
  var prefix = encodeURIComponent(name + '=');
  var pars = urlparts[1].split(/[&;]/g);
  var i = 0,
    len = pars.length;

  for (; i < len; i++) {
    if (encodeURIComponent(pars[i]).lastIndexOf(prefix, 0) !== -1) {
      pars.splice(i, 1);
    }
  }
  url = urlparts[0] + (pars.length > 0 ? '?' + pars.join('&') : '');
  return url;
}