Cross Domain 100% Height?

Tried and Failed: –
[advanced_iframe src=”https://bon.bonology.com/p/i/” enable_external_height_workaround=”true”]
<script src=”https://bonology.com/wp-content/plugins/advanced-iframe/js/ai_external.js”></script&gt;

I noticed you said:

you can do this is you are able to add JavaScript to their page. See the external workaround.

Okay, https://bon.bonology.com is my site, a RSS script called FreshRSS.org (one click install using cPanel) which has a index.php and index.html

Is this a possible? Step-by-step instructions/sample if you don’t mind. I am happy to buy the pro version if this one works.

Else, can you try this one > https://github.com/davidjbradshaw/iframe-resizer-react
(I don’t know what to do with it, make a plufgin with it…?)