Cannot read property 'offsetHeight' of undefined about pym.js HOT 3 CLOSED

Your page loads and initializes Pym inside the head tag, which means that when it tries to find and send the height of the body tag, the browser's HTML parser hasn't created the body yet, and the script fails. Move the Pym-related code in the child page to the bottom of the body tag to give the parser time to work.

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Thanks for this. It did fix my issue, however my child iframe is still not resizing. I put the following code on the child to manually send the height back to the parent but it doesn't appear to be doing anything. Any thoughts?

var pymChild = null;

            document.addEventListener("DOMContentLoaded", function () {
                pymChild.sendHeight();
            });

            pymChild = new pym.Child();

Thanks!

from pym.js.

I usually turn on the { polling: 200 } option for Pym children instead of manually sending the height on each DOM change. If that doesn't solve your problem, it may be worth making sure that the body of the child page has a measurable offsetHeight--in some cases, CSS changes that set a percentage height will cause the element to size itself to the window, and not vice-versa.

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