BrettBukowski/screenshot.js

## screenshot.js
function urlsToAbsolute(nodeList) {
  if (!nodeList.length) {
    return [];
  }

  var attrName = 'href';
  if (nodeList[0].__proto__ === HTMLImageElement.prototype ||
      nodeList[0].__proto__ === HTMLScriptElement.prototype) {
    attrName = 'src';
  }

  nodeList = [].map.call(nodeList, function(el, i) {
    var attr = el.getAttribute(attrName);
    // If no src/href is present, disregard.
    if (!attr) {
      return;
    }

    var absURL = /^(https?|data):/i.test(attr);
    if (absURL) {
      return el;
    } else {
      // Set the src/href attribute to an absolute version.
      if (attr.indexOf('/') != 0) { // src="images/test.jpg"
        el.setAttribute(attrName, document.location.origin + document.location.pathname + attr);
      } else if (attr.match(/^\/\//)) { // src="//static.server/test.jpg"
        el.setAttribute(attrName, document.location.protocol + attr);
      } else {
        el.setAttribute(attrName, document.location.origin + attr);
      }

      // Set the src/href attribute to an absolute version. Accessing
      // el['src']/el['href], the browser will stringify an absolute URL, but
      // we still need to explicitly set the attribute on the duplicate.
      return el;
    }
  });
  return nodeList;
}

function screenshot (el) {
  urlsToAbsolute(document.images);
  urlsToAbsolute(document.querySelectorAll("link[rel='stylesheet']"));
  urlsToAbsolute(document.scripts);

  var toCapture = (el || document.documentElement).cloneNode(true);
  var template, blob;

  // Make screenshot read-only, no scrolling, and no selections.
  toCapture.style.pointerEvents = 'none';
  toCapture.style.overflow = 'hidden';
  toCapture.style.userSelect = 'none';

  if (el) {
    var head = document.head.cloneNode(true);
    // Construct a bare-bones page w/ nothing else on it.
    // Keep the source element's dimensions.
    var style = window.getComputedStyle(el);
    toCapture.style.width = style.width;
    toCapture.style.height = style.height;

    template = ['<!DOCTYPE html><html lang="en">',
        head.outerHTML,
        '<body>',
        toCapture.outerHTML,
        '</body></html>'
    ].join('');
  }
  else {
    template = toCapture.outerHTML;
  }

  blob = new Blob([template], { type: 'text/html' });

  window.open(window.URL.createObjectURL(blob));
}
	function urlsToAbsolute(nodeList) {
	if (!nodeList.length) {
	return [];
	}

	var attrName = 'href';
	if (nodeList[0].__proto__ === HTMLImageElement.prototype \|\|
	nodeList[0].__proto__ === HTMLScriptElement.prototype) {
	attrName = 'src';
	}

	nodeList = [].map.call(nodeList, function(el, i) {
	var attr = el.getAttribute(attrName);
	// If no src/href is present, disregard.
	if (!attr) {
	return;
	}

	var absURL = /^(https?\|data):/i.test(attr);
	if (absURL) {
	return el;
	} else {
	// Set the src/href attribute to an absolute version.
	if (attr.indexOf('/') != 0) { // src="images/test.jpg"
	el.setAttribute(attrName, document.location.origin + document.location.pathname + attr);
	} else if (attr.match(/^\/\//)) { // src="//static.server/test.jpg"
	el.setAttribute(attrName, document.location.protocol + attr);
	} else {
	el.setAttribute(attrName, document.location.origin + attr);
	}

	// Set the src/href attribute to an absolute version. Accessing
	// el['src']/el['href], the browser will stringify an absolute URL, but
	// we still need to explicitly set the attribute on the duplicate.
	return el;
	}
	});
	return nodeList;
	}

	function screenshot (el) {
	urlsToAbsolute(document.images);
	urlsToAbsolute(document.querySelectorAll("link[rel='stylesheet']"));
	urlsToAbsolute(document.scripts);

	var toCapture = (el \|\| document.documentElement).cloneNode(true);
	var template, blob;

	// Make screenshot read-only, no scrolling, and no selections.
	toCapture.style.pointerEvents = 'none';
	toCapture.style.overflow = 'hidden';
	toCapture.style.userSelect = 'none';

	if (el) {
	var head = document.head.cloneNode(true);
	// Construct a bare-bones page w/ nothing else on it.
	// Keep the source element's dimensions.
	var style = window.getComputedStyle(el);
	toCapture.style.width = style.width;
	toCapture.style.height = style.height;

	template = ['<!DOCTYPE html><html lang="en">',
	head.outerHTML,
	'<body>',
	toCapture.outerHTML,
	'</body></html>'
	].join('');
	}
	else {
	template = toCapture.outerHTML;
	}

	blob = new Blob([template], { type: 'text/html' });

	window.open(window.URL.createObjectURL(blob));
	}