Question

/**
 * @param {*} name
 * @param {*} origin
 */

export function getUrlParam(name, origin = null) {
  let reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)");
  let r = null;
  if (origin == null) {
    r = window.location.search.substr(1).match(reg);
  } else {
    r = origin.substr(1).match(reg);
  }
  if (r != null) return decodeURIComponent(r[2]);
  return null;
}