Can implement Standalone package(2.7.2) to a python-django framework and access ketcher with javascript

[Jo-Zh]

Hi,
I saw lots of examples and good usages in React, but I am using django currently and use build in template, So I downloaded standalone package and implement to a Django project with JS, index.html, Css files.
First of all, the editor works.
But had issues to access Ketcher functions like .setMolecular with javascript by following this link https://lifescience.opensource.epam.com/ketcher/developers-manual.html#installation

The workflow is:

1. copy standalone package CSS, JS to static, index.html to template. Set views, url... and load static in Django Template....
2. Go to a Template html contains <iframe id="ifKetcher" src="ketcher/index.html" width="800" height="600"></iframe>
   and Write the codes :
   `
   var ketcherFrame = document.getElementById('ifKetcher');
   var ketcher = null;

if ('contentDocument' in ketcherFrame)
ketcher = ketcherFrame.contentWindow.ketcher;
else // IE7
ketcher = document.frames['ifKetcher'].window.ketcher;
`
3. Then I expected result is able to access ketcher functions like .setMolecular... But I got ketcher is undefined.
and the contentWindow objects has property ketcher with "U" tag (guess meaning undefined).

Not sure did everything properly, hope someone can help me. Thanks!

[Jo-Zh]

I found this: #1049 and replicated the result, when first loading a ketcher windows in react application.
But I still don' t know how to use ketcher.setMolecule in a iframe without react application...
Anyone did it successfully using vanilla javascript? Any hints? Thanks...