iframeAutoAdjust.js: iframeの高さをリンク先文書の高さにする

iframe-auto-adjust.js

/**
 * iframe-auto-adjust.js
 *
 * @version 1.0.1
 * @author think49
 * @url https://gist.github.com/1151313
 */

'use strict';
(function () {

  function handleIframeLoad (event) {
    var iframe, iframeDoc, docWidth, docHeight, scrollWidth, scrollHeight, style;

    iframe = event.target || event.srcElement;

    // RFC3986 (3.1. Scheme)
    if (/^[A-Za-z](?:[A-Za-z]|[0-9]|[+\-.])*:\u002F\u002F/.test(iframe.getAttribute('src'))) {
      return;
    }

    iframeDoc = iframe.contentDocument || iframe.contentWindow && iframe.contentWindow.document;

    if (!iframeDoc) {
      return;
    }

    docWidth = iframeDoc.width;
    docHeight = iframeDoc.height;
    scrollWidth = iframeDoc.documentElement.scrollWidth;
    scrollHeight = iframeDoc.documentElement.scrollHeight;
    style = iframe.style;
    style.width = (docWidth && docWidth >= scrollWidth ? docWidth : scrollWidth + 15) + 'px';
    style.height = (docHeight && docHeight >= scrollHeight  ? docHeight : scrollHeight + 15) + 'px';
  }

  function handleDOMContentLoaded (event) {
    var doc, iframes, iframe, i, l;

    doc = event.target || document;
    iframes = doc.getElementsByTagName('iframe');

    for (i = 0, l = iframes.length; i < l; i++) {
      iframe = iframes[i];
      if (typeof iframe.addEventListener === 'function') {
        iframe.addEventListener('load', handleIframeLoad, false);
      } else {
        handleIframeLoad.call(iframe, {target: iframe});
      }
    }
  }


  if (typeof document.addEventListener === 'function') {
    document.addEventListener ('DOMContentLoaded', handleDOMContentLoaded, false);
  } else if (typeof attachEvent === 'object' || typeof attachEvent === 'function') {
    attachEvent('onload', handleDOMContentLoaded);
  }
})();

• iframe-auto-adjust.js