dtapuska

worker.postMessage('example', {transfer: [a,b]});
will be equivalent to
worker.postMessage('example', [a, b]);

window.postMessage('example', 'http://example.com');
will be equivalent to
window.postMessage('example', {targetOrigin: 'http://example.com'});

dtapuska

(function(){
  function getElementXPath(element) {
    if (element && element.id)
      return '//*[@id="' + element.id + '"]';
    else
      return getElementTreeXPath(element);
  }

  function getElementTreeXPath(element) {
    var paths = [];