What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.

At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.

We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.

  • Profile Image

    Why am I experiencing trouble embedding a form using javascript?

    Asked by collegeplus on November 26, 2012 at 12:44 PM

    I have been using the standard embed code (<script type="text/javascript" src=""></script>) for a form on a website for the past several months, and just recently received this error message when accessing the form:

    v8_build_source.js:49: ReferenceError: V8Config is not defined load ( V8Config.CACHEPATH + form_id + '.js' )

    I switched the embed code over to an iframe, and everything works fine now. Just curious, but why would I have experienced this problem in the first place?

  • Profile Image
    JotForm Support

    Answered by Welvin on November 26, 2012 at 01:02 PM


    This is just a temporary glitch that may happen sometimes due to conflicting issues with the new features added or a result of a fixes that have been done by our developers. Or, sometimes due to Jotform server loads.

    Iframe would be the best solutions if such case will continue to happen in your embedded forms.

    Please let us know if the issue will still occur so we can forward this to our developers.


    Thank you.