Fix medium iframes

fix-medium-iframes.js

// Replace iframes to load their real content
// Intended to be used in Scratchpad (Firefox)

(function() {
  let sf = $(".js-stickyFooter");
  if(sf !== null) { sf.remove(); }
  
  document.querySelectorAll("figure iframe").forEach(iframe => {
    let src = iframe.dataset["src"];
    let newIframe = document.createElement("iframe");
    newIframe.style = "width: 100%; border: 1px solid #ccc";
    newIframe.src = src;
    newIframe.onload = () => {
      newIframe.height = newIframe.contentWindow.document.body.scrollHeight + "px";
    }
    let container = iframe.closest("figure");
    container.parentNode.insertBefore(newIframe, container);
    container.parentNode.removeChild(container);
  });
})();