ネイティブJavascriptでwrap

/*Downloaded from https://www.codeseek.co/neko_sugar310gb/andx30cdandx30a4andx30c6andx30a3andx30d6javascriptandx3067wrap-gevWwd */
.douga{border:solid 1px #000;}
iframe{border:solid 15px #ccc;}

/*Downloaded from https://www.codeseek.co/neko_sugar310gb/andx30cdandx30a4andx30c6andx30a3andx30d6javascriptandx3067wrap-gevWwd */
/*====================
* native wrap
----------------------
+elm : object
+cre : rap tag object
======================*/
var wrap=function(elm,cre){
  var or=elm.nextElementSibling,
      pre=elm.parentNode;
  cre.appendChild(elm);
  pre.insertBefore(cre,or);
};

var douga = document.getElementsByTagName("iframe");
//超絶適当に書いたイベント設定
for(var i=0;i<douga.length;i++){
  douga[i].addEventListener("click",function(){
    console.log("ok");
  });
}
//要素を書き換えるやつ
document.addEventListener("DOMContentLoaded", function(){
  var creD=document.createElement("div");
  creD.className="douga";
  for(var i = 0; i < douga.length; ++i){
    wrap(douga[i],creD.cloneNode());
  }
});