使用localy生成的代码通过javascript加载IFrame

BACKGROUND INFO:
Hello, recently I have been trying to create a website generator for my school, and it has gone quite well, it nearly has as many features as Wix. Recently I tried to add support for parallax effects through parallax.js, and it works perfectly (you can generate the website and see it when you save it and open it in a new tab), but parallax.js does not rescan the page for parallax elements each time the page is changed. I tried using an iframe to do this, and it worked. However, the way that I give them a preview is that the code is generated client-side (in the pagemaker), so I need a way to 'load' an IFrame through javascript using generated code. Hello, recently I have been tr