获取url里某个参数

屎山，懒得改

function getUrlKey(name, url) {
      let getdata =
        decodeURIComponent(
          (new RegExp("[?|&]" + name + "=" + "([^&;]+?)(&|#|;|$)").exec(
            url
          ) || [, ""])[1].replace(/\+/g, "%20")
        ) || undefined;
      if (getdata == "undefined" || getdata == undefined) {
        return "";
      }
      return getdata;
    }