"Object doesn't support property or method 'createEvent'" against IE11 in Enterprise Compatibility Mode

2 posts, 0 answers
  1. Greg
    Greg avatar
    1 posts
    Member since:
    Feb 2013

    Posted 21 Oct 2016 Link to this post

    We are using the Testing Framework (version 2016_3_0928_5) against a site that is forced to use IE 11 in Enterprise Compatibility Mode and we often see the following exception while executing the tests:

    System.InvalidOperationException: Javascript call [var eventObjJSON = 'null';var eventObj = JSON.parse(eventObjJSON);var eventType = "HTMLEvents";var eventName = "change";var evt = document.createEvent(eventType);if (!evt) throw "Error creating event";var altKey = false;var ctrlKey = false;var shiftKey = false;var metaKey = false;if (eventType == "HTMLEvents" || !eventObj) {evt.initEvent(eventName, true, true);}else {if (eventObj.modifiers & 0x01)altKey = true;if (eventObj.modifiers & 0x02)ctrlKey = true;if (eventObj.modifiers & 0x04)shiftKey = true;if (eventObj.modifiers & 0x08)metaKey = true;if (eventType == "MouseEvents") {var button = 0;if (eventObj.button & 1)button = 0;else if (eventObj.button & 2)button = 2;else if (eventObj.button & 4)button = 1;var relatedTarget;if (eventObj.relatedTarget)relatedTarget = eval(eventObj.relatedTarget);evt.initMouseEvent(eventName, true, true, window, 0, eventObj.screenX, eventObj.screenY,0, 0, ctrlKey, altKey, shiftKey, metaKey, button, relatedTarget);}else if (eventType == "KeyboardEvent") {var keyCode;var charCode;keyCode = eventObj.keyCode;if (eventName == "keypress") {charCode = eventObj.keyCode;}else {charCode = 0;}var keyNum = String.fromCharCode(parseInt(keyCode)).toUpperCase().charCodeAt(0);var keyIdentifier = "U+00" + keyNum.toString(16);evt.initKeyboardEvent(true, true, window,keyIdentifier,0, ctrlKey, altKey, shiftKey, metaKey);}}var target = document.getElementsByTagName('select')[1];target.dispatchEvent(evt);] failed! Please make sure the function exists and the call is using the correct prototype signature. Javascript error: TypeError: Object doesn't support property or method 'createEvent' 

    Has anybody encountered a similar error and found a resolution?

    Any help would be greatly appreciated.

    Thank you,


  2. Elena
    Elena avatar
    1215 posts

    Posted 25 Oct 2016 Link to this post

    Hi Greg,

    Thank you for your feedback. Could you please share further details on the topic and when this exception is thrown in the logs. Does it appear for certain action steps or certain circumstances? Please generate your application log during such a faulty execution and provide it here. Please clear the log prior the execution to ensure only relative to the issue information will be recorded within the file. 

    It would be quite helpful as well if you could provide direct access to your application along with a script that reproduces such an error for further investigation. I appreciate your cooperation! 

    Elena Tsvetkova
    Telerik by Progress
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