So I am using an editor and then creating an iframe based on the content of that editor. The editor will have a single preview file and then we can do a script import of a javascript file in the preview HTML file. That imported javascript file will also be in string/text (the content of the file stored in a variable). And of course the javascript file can further import other javascript files. My question is how do we inject the script import in the HTML file that we then use to create an iframe? The only approach I could think of was with RegEx by finding and replacing the script tag with the content of the JS file but I don't know if that will work correctly

This right here is the HTML file I am using for the iframe. The arrow indicating the imported script file.