reframe.js

!function(e,t){"object"==typeof exports&&"undefined"!=typeof module?module.exports=t():"function"==typeof define&&define.amd?define(t):e.reframe=t()}(this,function(){"use strict";function e(e,t){var i="string"==typeof e?document.querySelectorAll(e):e,n=t||"js-reframe";"length"in i||(i=[i]);for(var o=0;o<i.length;o+=1){var r=i[o];if(!(-1!==r.className.split(" ").indexOf(n))){var d=r.getAttribute("height"),f=r.getAttribute("width");if(!(f.indexOf("%")>-1||r.style.width.indexOf("%")>-1)){var a=(d||r.offsetHeight)/(f||r.offsetWidth)*100,s=document.createElement("div");s.className=n;var l=s.style;l.position="relative",l.width="100%",l.paddingTop=a+"%";var p=r.style;p.position="absolute",p.width="100%",p.height="100%",p.left="0",p.top="0",r.parentNode.insertBefore(s,r),r.parentNode.removeChild(r),s.appendChild(r)}}}}return e});reframe('iframe');